Improved local shell snippet rendering

knowledge base/1password-cli.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # installation
 brew cask install 1password-cli
 
@@ -23,7 +23,7 @@ op list items
 
 - After you have signed in the first time, you can sign in again using your account shorthand, which is your sign-in address subdomain (in this example, _company_); `op signin` will prompt you for your password and output a command that can save your session token to an environment variable:
 
-  ```shell
+  ```sh
   op signin company
   ```
 

knowledge base/README.md

@@ -0,0 +1,15 @@
+# Knwoledge base
+
+This is the collection of all notes, reminders and whatnot I gathered during the years.
+
+## Conventions
+
+- Use `sh` as document language instead of `shell` when writing shell snippets in code blocks:
+
+  ```diff
+  - ```shell
+  + ```sh
+  #!/usr/bin/env zsh
+  ```
+
+  The local renderer just displays them better like this.

knowledge base/access a jar file contents.md

@@ -3,7 +3,7 @@
 A `.jar` file is nothing more than an archive.  
 You can find all the files it contains just unzipping it:
 
-```shell
+```sh
 $ unzip file.jar
 Archive:  file.jar
    creating: META-INF/

knowledge base/acl.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # show acls of file test/declarations.h
 getfacl test/declarations.h
 

knowledge base/ansible.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Install.
 pip3 install --user ansible && port install sshpass   # darwin
 sudo pamac install ansible sshpass                    # manjaro linux
@@ -161,7 +161,7 @@ ansible-galaxy remove namespace.role
 
 Roles can be either **created**:
 
-```shell
+```sh
 ansible-galaxy init role-name
 ```
 
@@ -174,7 +174,7 @@ collections:
   - community.docker
 ```
 
-```shell
+```sh
 ansible-galaxy install mcereda.boinc_client
 ansible-galaxy install --roles-path ~/ansible-roles namespace.role
 ansible-galaxy install namespace.role,v1.0.0
@@ -203,7 +203,7 @@ dependencies:
 
 Change Ansible's output setting the stdout callback to `json` or `yaml`:
 
-```shell
+```sh
 ANSIBLE_STDOUT_CALLBACK=yaml
 ```
 

knowledge base/antigen.md

@@ -6,14 +6,14 @@
 
 Example:
 
-```shell
+```sh
 tee: /Users/user/.antigen/bundles/robbyrussell/oh-my-zsh/cache//completions/_helm: No such file or directory
 /Users/user/.antigen/bundles/robbyrussell/oh-my-zsh/plugins/helm/helm.plugin.zsh:source:9: no such file or directory: /Users/user/.antigen/bundles/robbyrussell/oh-my-zsh/cache//completions/_helm
 ```
 
 The issue is due of the `$ZSH_CACHE_DIR/completions` being missing and `tee` not creating it on Mac OS X. Create the missing `completions` directory and re-run antigen:
 
-```shell
+```sh
 mkdir -p $ZSH_CACHE_DIR/completions
 antigen apply
 ```

knowledge base/apk.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Update the package lists.
 apk update
 

knowledge base/apt.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # mark all packages as non-explicitly installed
 apt-mark auto $(sudo apt-mark showmanual)
 

knowledge base/asdf.md

@@ -4,7 +4,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # list installed plugins
 asdf plugin list
 
@@ -46,7 +46,7 @@ asdf current helm
 
 ## Installation
 
-```shell
+```sh
 # install the program
 brew install asdf
 
@@ -57,7 +57,7 @@ brew install asdf
 
 ## Plugins management
 
-```shell
+```sh
 # list installed plugins
 asdf plugin list
 asdf plugin list --urls
@@ -80,7 +80,7 @@ asdf plugin remove $PLUGIN_NAME
 
 ## Versions management
 
-```shell
+```sh
 # list installed versions for a plugin
 # asdf list $PLUGIN_NAME
 asdf list elixir

knowledge base/authenticate without using sudo.md

@@ -7,7 +7,7 @@ Requires [polkit] to be:
 - installed
 - configured to authorize and authenticate the users
 
-```shell
+```sh
 pkexec COMMAND
 ```
 

knowledge base/aws.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Install the CLI.
 brew install awscli
 
@@ -16,7 +16,7 @@ export AWS_PROFILE="work"
 
 ## Profiles
 
-```shell
+```sh
 # Initialize the default profile.
 # Not specifying a profile means to configure the default profile.
 $ aws configure

knowledge base/az.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # login
 az login
 

knowledge base/bash.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Run a command or function on exit, kill or error.
 trap "rm -f $tempfile" EXIT SIGTERM ERR
 trap function-name EXIT SIGTERM ERR

knowledge base/boinccmd.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # use a project manager
 boinccmd --acct_mgr attach http://bam.boincstats.com myAwesomeUsername myAwesomePassword
 boinccmd --acct_mgr info

knowledge base/btrfs.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # create a volume with single metadata and double data blocks (useless but good example)
 sudo mkfs.btrfs --metadata single --data dup /dev/sdb
 
@@ -44,7 +44,7 @@ sudo compsize /mnt/btrfs-volume
 
 See also [snapper].
 
-```shell
+```sh
 sudo btrfs send --no-data -p /old/snapshot /new/snapshot | sudo btrfs receive --dump
 
 # requires you to be using snapper for your snapshots

knowledge base/cheat.sh.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # using the exact name of the command
 curl cheat.sh/tar
 curl cht.sh/curl

knowledge base/check a pod can connect to an external db.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # access a test container
 kubectl run --generator=run-pod/v1 --limits 'cpu=200m,memory=512Mi' --requests 'cpu=200m,memory=512Mi' --image alpine ${USER}-mysql-test -it -- sh
 

knowledge base/chezmoi.md

@@ -4,7 +4,7 @@ A multi-machine dotfile manager, written in Go.
 
 ## TL;DR
 
-```shell
+```sh
 # initialize chezmoi
 chezmoi init
 chezmoi init https://github.com/username/dotfiles.git
@@ -50,7 +50,7 @@ chezmoi update
 
 ## Save the current data to a remote repository
 
-```shell
+```sh
 $ chezmoi cd
 chezmoi $> git remote add origin https://github.com/username/dotfiles.git
 chezmoi $> git push -u origin main

knowledge base/clamav.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # manually update the virus definitions
 # do it once **before** starting a scan or the daemon
 # the definitions updater deamon must be stopped to avoid complaints from it
@@ -39,7 +39,7 @@ nice -n 15 clamscan && clamscan --bell -i -r /home
 - The `--fdpass` option of `clamdscan` (notice the _d_ in the command) sends a file descriptor to clamd rather than a path name, avoiding the need for the `clamav` user to be able to read everyone's files
 - `clamscan` is designed to be single-threaded, so when scanning a file or directory from the command line only a single CPU thread is used; use `xargs` or another executor to run a scan in parallel:
 
-  ```shell
+  ```sh
   find . -type f -printf "'%p' " | xargs -P $(nproc) -n 1 clamscan
   find . -type f | parallel --group --jobs 0 -d '\n' clamscan {}
   ```

knowledge base/compare two pdf files.md

@@ -2,13 +2,13 @@
 
 Install and use `diffpdf` (preferred) or `diff-pdf`:
 
-```shell
+```sh
 sudo zypper install diff-pdf
 ```
 
 As an alternative:
 
-```shell
+```sh
 # create a pdf with the diff as red pixels
 compare -verbose -debug coder $PDF_1 $PDF_2 -compose src /tmp/$OUT_FILE.tmp
 

knowledge base/cpufreq.md

@@ -4,7 +4,7 @@ Default governor is _ondemand_ for older CPUs and kernels and _schedutil_ for ne
 
 ## TL;DR
 
-```shell
+```sh
 # list the available governors
 cpupower frequency-info --governors
 

knowledge base/curl.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Send a single GET request and show its output on stdout.
 curl http://url.of/file
 

knowledge base/diff-pdf.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # just check
 diff-pdf --verbose file1.pdf file2.pdf
 

knowledge base/docker.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Show locally available images.
 docker images -a
 
@@ -101,7 +101,7 @@ The docker daemon is configured using the `/etc/docker/daemon.json` file:
 
 Docker mounts specific system files in all containers to forward its settings:
 
-```shell
+```sh
 6a95fabde222$ mount
 …
 /dev/disk/by-uuid/1bb…eb5 on /etc/resolv.conf type btrfs (rw,…)
@@ -116,7 +116,7 @@ Those files come from the volume the docker container is using for its root, and
 
 - Containers created with no specified name will be assigned one automatically:
 
-  ```shell
+  ```sh
   $ docker create hello-world
   8eaaae8c0c720ac220abac763ad4b477d807be4522d58e334337b1b74a14d0bd
 
@@ -131,7 +131,7 @@ Those files come from the volume the docker container is using for its root, and
 
 - When referring to a container or image using their ID, you just need to use as many characters you need to uniquely specify a single one of them:
 
-  ```shell
+  ```sh
   $ docker ps -a
   CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS    PORTS   NAMES
   63b1a0a3e557   alpine        "/bin/sh"  34 seconds ago   Created           alpine

knowledge base/dpkg.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # add an extra architecture
 dpkg --add-architecture i386
 

knowledge base/envsubst.md

@@ -4,12 +4,12 @@ Substitutes environment variables in shell format strings.
 
 ## TL;DR
 
-```shell
+```sh
 envsubst < input.file
 envsubst < input.file > output.file
 ```
 
-```shell
+```sh
 $ cat hello.file
 hello $NAME
 

knowledge base/export all variables in a envfile.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 set -o allexport
 source envfile
 set +o allexport

knowledge base/extract attachments from multipart emails.md

@@ -18,7 +18,7 @@ In such cases the text file itself contains the multipart message body of the em
 
 You can use `munpack` to easily extract attachments out of such text files and write them into a proper named files.
 
-```shell
+```sh
 $ munpack -f plaintext.eml
 myawesomefile.tar.gz (application/x-gzip)
 ```

knowledge base/fedora linux.md

@@ -6,7 +6,7 @@ RPM Fusion provides software that the Fedora Project or Red Hat doesn't want to
 
 These repositories are not available by default and need to be installed using a remote package:
 
-```shell
+```sh
 # All flavours but Silverblue-based ones.
 sudo dnf install https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm https://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm
 
@@ -16,7 +16,7 @@ sudo rpm-ostree install https://download1.rpmfusion.org/free/fedora/rpmfusion-fr
 
 After enabling the repositories, you can add their _tainted_ versions for closed or restricted packages:
 
-```shell
+```sh
 sudo dnf install rpmfusion-{free,nonfree}-release-tainted
 sudo rpm-ostree install rpmfusion-{free,nonfree}-release-tainted
 ```

knowledge base/fedora silverblue.md

@@ -4,7 +4,7 @@
 
 Changes to the base layer are executed in a new bootable filesystem root. This means that the system must be rebooted after a package has been layered.
 
-```shell
+```sh
 # Check for available upgrades.
 rpm-ostree upgrade --check
 

knowledge base/ffmpeg.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Convert a webm file to GIF.
 ffmpeg -y -i rec.webm -vf palettegen palette.png \
   && ffmpeg -y -i rec.webm -i palette.png \
@@ -13,7 +13,7 @@ ffmpeg -y -i rec.webm -vf palettegen palette.png \
 
 ### Webm to GIF
 
-```shell
+```sh
 ffmpeg -y -i rec.webm -vf palettegen palette.png
 ffmpeg -y -i rec.webm -i palette.png -filter_complex paletteuse -r 10 out.gif
 ```

knowledge base/find.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Change the permissions of all files and directories in the current directory,
 # recursively.
 find . -type d -exec chmod 755 {} +
@@ -101,7 +101,7 @@ Any number of units may be combined in one `-Xtime` argument.
 with the `-newerXY file` form, `find` checks if `file` has a more recent last access time (X=a), inode creation time (X=B), change time (X=c), or modification time (X=m) than the last access time (Y=a), inode creation time (Y=B), change time (Y=c), or modification time (Y=m).  
 If Y=t, `file` is interpreted as a direct date specification of the form understood by `cvs`. Also, `-newermm` is the same as `-newer`.
 
-```shell
+```sh
 # Find files last accessed exactly 5 minutes ago.
 find /dir -amin 5
 find /dir -atime 300s
@@ -143,14 +143,14 @@ find / -newer file.txt -user wnj -print
 
 - in GNU's `find` the path parameter defaults to the current directory and can be avoided
 
-  ```shell
+  ```sh
   # Delete all empty folders in the current directory only.
   find -maxdepth 1 -empty -delete
   ```
 
 - GNU's `find` also understands fractional time specifications:
 
-  ```shell
+  ```sh
   # Find files modified in the last 1 hour and 30 minutes.
   find -mtime 1.5h
   ```

knowledge base/firewalld.md

@@ -9,7 +9,7 @@ It is the default firewall management tool for:
 
 ## TL;DR
 
-```shell
+```sh
 # Show which zone is currently selected as the default.
 firewall-cmd --get-default-zone
 

knowledge base/flatpak.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # List installed applications and runtimes.
 flatpak list
 flatpak list --app

knowledge base/freebsd.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Initialize package managers.
 portsnap auto
 pkg bootstrap

knowledge base/funtoo linux.md

@@ -1,6 +1,6 @@
 # Funtoo GNU/Linux
 
-```shell
+```sh
 # Portage update.
 sudo ego sync
 sudo emerge --sync

knowledge base/fwupd.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Display all detected devices.
 fwupdmgr get-devices
 

knowledge base/gcloud.md

@@ -6,7 +6,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Login.
 gcloud auth login
 gcloud auth login account

knowledge base/get the environment of a process running in a container.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 cat /proc/${PID}/environ
 
 # Container in kubernetes.

knowledge base/git.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Set your identity.
 git config user.name 'User Name'
 git config --global user.email user@email.com
@@ -291,7 +291,7 @@ git show :/cool
 
 ## Configuration
 
-```shell
+```sh
 # Required to be able to commit changes.
 git config --local user.email 'me@me.info'
 git config --local user.name 'Me'
@@ -311,7 +311,7 @@ git config --global submodule.recurse true
 
 To show the current configuration use the `--list` option:
 
-```shell
+```sh
 git config --list
 git config --list --show-scope
 git config --list --global --show-origin
@@ -320,7 +320,7 @@ git config --list --global --show-origin
 The configuration is shown in full for the requested scope (or all if not specified), but it might include the same setting multiple times if it shows up in multiple scopes.  
 Render the current value of a setting using the `--get` option:
 
-```shell
+```sh
 # Get the current user.name value.
 git config --get user.name
 
@@ -333,7 +333,7 @@ git config --list \
 
 ## Manage changes
 
-```shell
+```sh
 # Show changes relative to the current index (not yet staged).
 git diff
 
@@ -370,7 +370,7 @@ git diff --no-index path/to/file/A path/to/file/B
 
 Just save the output from `git diff` to get a patch file:
 
-```shell
+```sh
 # Just the current changes.
 # No staged nor committed files.
 git diff > file.patch
@@ -382,7 +382,7 @@ git diff --output file.patch --cached
 The output from `git diff` just shows changes to **text** files by default, no metadata or other information about commits or branches.  
 To get a whole commit with all its metadata and binary changes, use `git format-patch`:
 
-```shell
+```sh
 # Include 5 commits starting with 'commit' and going backwards.
 git format-patch -5 commit
 
@@ -401,14 +401,14 @@ git add . && git commit -m 'uncommitted' \
 
 Use `git apply` to apply a patch file to the current index:
 
-```shell
+```sh
 git apply file.patch
 ```
 
 The changes from the patch are unstaged and no commits are created.  
 To apply all commits from a patch, use `git am` on a patch created with `git format-patch`:
 
-```shell
+```sh
 git am file.patch
 ```
 
@@ -419,7 +419,7 @@ The commits are applied one after the other and registered in the repository's l
 The _stash_ is a changelist separated from the one in the current working directory.  
 `git stash` will save the current changes there and cleans the working directory. You can (re-)apply changes from the stash at any time:
 
-```shell
+```sh
 # Stash changes locally.
 git stash
 
@@ -442,7 +442,7 @@ git stash apply stash@{6}
 
 This creates a local branch tracking an existing remote branch.
 
-```shell
+```sh
 $ git checkout -b local-branch remote/existing-branch
 Branch 'local-branch' set up to track remote branch 'existing-branch' from 'remote'.
 Switched to a new branch 'local-branch'
@@ -450,7 +450,7 @@ Switched to a new branch 'local-branch'
 
 ### Delete a branch
 
-```shell
+```sh
 # Delete local branches.
 git branch --delete local-branch
 git branch -D local-branch
@@ -467,7 +467,7 @@ git branch --delete --remotes feat-branch
 
 Command source [here][prune local branches that do not exist on remote anymore].
 
-```shell
+```sh
 # Branches merged on the remote are tagged as 'gone' in `git branch -vv`'s output.
 git fetch -p \
   && awk '/origin/&&/gone/{print $1}' <(git branch -vv) | xargs git branch -d
@@ -478,7 +478,7 @@ git branch --merged | grep -vE '(^\*|master|main|dev)' | xargs git branch -d
 
 ### Merge the master branch into a feature branch
 
-```shell
+```sh
 git stash pull
 git checkout master
 git pull
@@ -488,7 +488,7 @@ git merge --no-ff master
 git stash pop
 ```
 
-```shell
+```sh
 git checkout feature
 git pull origin master
 ```
@@ -498,7 +498,7 @@ git pull origin master
 `git rebase` takes the commits in a branch and appends them on top of the commits in a different branch.
 The commits to rebase are previously saved into a temporary area and then reapplied to the new branch, one by one, in order.
 
-```shell
+```sh
 # Rebase main on top of the current branch.
 git rebase main
 
@@ -513,7 +513,7 @@ git pull --rebase=interactive origin master
 
 _Annotated_ tags are stored as full objects in git's database:
 
-```shell
+```sh
 # Create annotated tags.
 git tag --annotate v0.1.0
 
@@ -529,7 +529,7 @@ git push --follow-tags
 
 while _lightweight_ tags are stored as a pointer to a specific commit:
 
-```shell
+```sh
 # Create lightweight tags.
 git tag v0.1.1-rc0
 git tag 1.12.1 HEAD
@@ -537,7 +537,7 @@ git tag 1.12.1 HEAD
 
 Type-generic tag operations:
 
-```shell
+```sh
 # Push specific tags.
 git push origin v1.5
 
@@ -591,7 +591,7 @@ Those commands need to be wrapped into a one-line function definition:
 
 1. Install the extension:
 
-   ```shell
+   ```sh
    apt install git-lfs
    brew install git-lfs
    dnf install git-lfs
@@ -600,7 +600,7 @@ Those commands need to be wrapped into a one-line function definition:
 
 1. If the package manager did not enable it system-wide, enable the extension for your user account:
 
-   ```shell
+   ```sh
    git lfs install
    ```
 
@@ -608,14 +608,14 @@ Those commands need to be wrapped into a one-line function definition:
 
 1. Configure file tracking from inside the repository:
 
-   ```shell
+   ```sh
    git lfs track "*.exe"
    git lfs track "enormous_file.*"
    ```
 
 1. Add the `.gitattributes` file to the traced files:
 
-   ```shell
+   ```sh
    git add .gitattributes
    git commit -m "lfs configured"
    ```
@@ -624,7 +624,7 @@ Those commands need to be wrapped into a one-line function definition:
 
 See [Git Submodules: Adding, Using, Removing, Updating] for more information.
 
-```shell
+```sh
 # Add a submodule to an existing repository.
 git submodule add https://github.com/ohmyzsh/ohmyzsh lib/ohmyzsh
 
@@ -640,7 +640,7 @@ To delete a submodule the procedure is more complicated:
 
 1. De-init the submodule:
 
-   ```shell
+   ```sh
    git submodule deinit lib/ohmyzsh
    ```
 
@@ -648,7 +648,7 @@ To delete a submodule the procedure is more complicated:
 
 1. Remove the submodule from the repository's index:
 
-   ```shell
+   ```sh
    git rm -rf lib/ohmyzsh
    ```
 
@@ -664,19 +664,19 @@ See [remove files from git commit].
 
 1. **Unstage** the file using `git reset`; specify HEAD as the source:
 
-   ```shell
+   ```sh
    git reset HEAD secret-file
    ```
 
 1. **Remove** the file from the repository's index:
 
-   ```shell
+   ```sh
    git rm --cached secret-file
    ```
 
 1. Check the file is no longer in the index:
 
-   ```shell
+   ```sh
    $ git ls-files | grep secret-file
    $
    ```
@@ -684,13 +684,13 @@ See [remove files from git commit].
 1. Add the file to `.gitignore` or remove it from the working directory.
 1. Amend the most recent commit from your repository:
 
-   ```shell
+   ```sh
    git commit --amend
    ```
 
 ## Remotes
 
-```shell
+```sh
 # Add a remote.
 git remote add gitlab git@gitlab.com:user/my-awesome-repo.git
 
@@ -705,7 +705,7 @@ git remote set-url origin git@github.com:user/new-repo-name.git
 
 To always push to `repo1`, `repo2`, and `repo3`, but always pull only from `repo1`, set up the remote 'origin' as follows:
 
-```shell
+```sh
 git remote add origin https://exampleuser@example.com/path/to/repo1
 git remote set-url --push --add origin https://exampleuser@example.com/path/to/repo1
 git remote set-url --push --add origin https://exampleuser@example.com/path/to/repo2
@@ -748,20 +748,20 @@ See <https://git-scm.com/docs/git-config#git-config-branchltnamegtremote>.
 
 When everything else fails, enable tracing:
 
-```shell
+```sh
 export GIT_TRACE=1
 ```
 
 ### GPG cannot sign a commit
 
-> ```shell
+> ```sh
 > error: gpg failed to sign the data
 > fatal: failed to write commit object
 > ```
 
 If gnupg2 and gpg-agent 2.x are used, be sure to set the environment variable GPG_TTY, specially zsh users with Powerlevel10k with Instant Prompt enabled.
 
-```shell
+```sh
 export GPG_TTY=$(tty)
 ```
 
@@ -769,7 +769,7 @@ export GPG_TTY=$(tty)
 
 Disable certificate verification:
 
-```shell
+```sh
 export GIT_SSL_NO_VERIFY=true
 git -c http.sslVerify=false …
 ```

knowledge base/gopass.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 gopass init
 
 # multistore init
@@ -14,7 +14,7 @@ gopass init --store work    --path ~/.password-store.work
 
 ### Browserpass
 
-```shell
+```sh
 brew tap amar1729/formulae
 brew install browserpass
 for b in chromium chrome vivaldi brave firefox; do

knowledge base/gpg.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # List existing keys.
 gpg --list-keys
 gpg --list-keys --keyid-format short
@@ -65,7 +65,7 @@ brew install gnupg
 
 ## Encryption
 
-```shell
+```sh
 # Single file.
 gpg --output $DB.key.gpg --encrypt --recipient $RECIPIENT $DB.key
 
@@ -76,7 +76,7 @@ find . -type f -name secret.txt \
 
 ## Decryption
 
-```shell
+```sh
 # Single file.
 gpg --output $DB.key --decrypt $DB.key.gpg
 
@@ -90,7 +90,7 @@ The second command will create the decrypted version of all files in the same di
 
 As the original user, export all public keys to a base64-encoded text file and create an encrypted version of that file:
 
-```shell
+```sh
 gpg --armor --export > mypubkeys.asc
 gpg --armor --export email > mypubkeys-email.asc
 gpg --armor --symmetric --output mysecretatedpubkeys.sec.asc mypubkeys.asc
@@ -98,14 +98,14 @@ gpg --armor --symmetric --output mysecretatedpubkeys.sec.asc mypubkeys.asc
 
 Export all encrypted private keys (which will also include corresponding public keys) to a text file and create an encrypted version of that file:
 
-```shell
+```sh
 gpg --armor --export-secret-keys > myprivatekeys.asc
 gpg --armor --symmetric --output mysecretatedprivatekeys.sec.asc myprivatekeys.asc
 ```
 
 Optionally, export gpg's trustdb to a text file:
 
-```shell
+```sh
 gpg --export-ownertrust > otrust.txt
 ```
 
@@ -113,7 +113,7 @@ gpg --export-ownertrust > otrust.txt
 
 As the new user, execute `gpg --import` commands against the two `.asc` files, or the decrypted content of those files, and then check for the new keys with `gpg -k` and `gpg -K`, e.g.:
 
-```shell
+```sh
 gpg --output myprivatekeys.asc --decrypt mysecretatedprivatekeys.sec.asc
 gpg --import myprivatekeys.asc
 gpg --output mypubkeys.asc --decrypt mysecretatedpubkeys.sec.asc
@@ -124,13 +124,13 @@ gpg --list-keys
 
 Optionally import the trustdb file as well:
 
-```shell
+```sh
 gpg --import-ownertrust otrust.txt
 ```
 
 ## Key trust
 
-```shell
+```sh
 $ gpg --edit-key fingerprint
 gpg> trust
 gpg> quit
@@ -140,7 +140,7 @@ gpg> quit
 
 > The non-interactive (--batch) option requires a settings file.
 
-```shell
+```sh
 # basic key with default values
 gpg --batch --generate-key <<EOF
     %echo Generating a default key
@@ -159,7 +159,7 @@ EOF
 
 ## Change a key's password
 
-```shell
+```sh
 $ gpg --edit-key fingerprint
 gpg> passwd
 gpg> quit
@@ -193,7 +193,7 @@ You can create multiple subkeys as you would do for SSH keypairs.
 You should already have a GPG key. If you don't, read one of the many fine tutorials available on this topic.  
 You will create the subkey by editing your existing key **in expert mode** to get access to the appropriate options:
 
-```shell
+```sh
 $ gpg2 --expert --edit-key fingerprint
 gpg> addkey
 Please select what kind of key you want:
@@ -262,7 +262,7 @@ Save changes? (y/N) y
 When using SSH, `ssh-agent` is used to manage SSH keys. When using a GPG key, `gpg-agent` is used to manage GPG keys.  
 To get `gpg-agent` to handle requests from SSH, you need to enable its SSH support:
 
-```shell
+```sh
 echo "enable-ssh-support" >> ~/.gnupg/gpg-agent.conf
 ```
 
@@ -270,7 +270,7 @@ You can avoid usinig `ssh-add` to load the keys pre-specifying which GPG keys to
 The entries in this file are keygrips—internal identifiers that `gpg-agent` uses to refer to the keys. A keygrip refers to both the public and private key.  
 To find the keygrip use `gpg -K --with-keygrip`, then add that line to the `~/.gnupg/sshcontrol` file:
 
-```shell
+```sh
 $ gpg2 -K --with-keygrip
 /home/bexelbie/.gnupg/pubring.kbx
 ------------------------------
@@ -288,7 +288,7 @@ $ echo 7710BA0643CC022B92544181FF2EAC2A290CDC0E >> ~/.gnupg/sshcontrol
 
 Now tell SSH how to access `gpg-agent` by setting the value of the `SSH_AUTH_SOCK` environment variable.
 
-```shell
+```sh
 export SSH_AUTH_SOCK=$(gpgconf --list-dirs agent-ssh-socket)
 gpgconf --launch gpg-agent
 ```
@@ -313,7 +313,7 @@ Run `ssh-add -L` to list your public keys and copy them over manually to the rem
 
 **Solution:** if `gnupg2` and `gpg-agent` 2.x are used, be sure to set the environment variable `GPG_TTY`:
 
-```shell
+```sh
 export GPG_TTY=$(tty)
 ```
 

knowledge base/grep the standard error stream.md

@@ -2,13 +2,13 @@
 
 If you're using `bash` or `zsh` you can employ anonymous pipes:
 
-```shell
+```sh
 ffmpeg -i 01-Daemon.mp3 2> >(grep -i Duration)
 ```
 
 If you want the filtered redirected output on `stderr` again, add the `>&2` redirection to grep:
 
-```shell
+```sh
 command 2> >(grep something >&2)
 ```
 
@@ -19,7 +19,7 @@ Bash calls this _process substitution_:
 
 You can exclude `stdout` and grep `stderr` redirecting it to `null`:
 
-```shell
+```sh
 command 1>/dev/null 2> >(grep -oP "(.*)(?=pattern)")
 ```
 

knowledge base/grep.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # base search
 grep 'pattern' path/to/search
 
@@ -39,7 +39,7 @@ For simple searches, you might want to use [pdfgrep].
 Should you need more advanced grep capabilities not incorporated by pdfgrep, you might want to convert the file to text and search there.  
 You can to this using [pdftotext](pdfgrep.md) as shown in this example ([source][stackoverflow answer about how to search contents of multiple pdf files]):
 
-```shell
+```sh
 find /path -name '*.pdf' -exec sh -c 'pdftotext "{}" - | grep --with-filename --label="{}" --color "your pattern"' ';'
 ```
 
@@ -48,7 +48,7 @@ find /path -name '*.pdf' -exec sh -c 'pdftotext "{}" - | grep --with-filename --
 - Standard editions of `grep` run in a single thread; use another executor like
   `parallel` or `xargs` to parallelize grepping multiple files:
 
-  ```shell
+  ```sh
   find . -type f | parallel -j 100% grep 'pattern'
   find . -type f -print0 | xargs -0 -n 1 -P $(nproc) grep 'pattern'
   ```

knowledge base/gsutils.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # delete a bucket and all its contents
 gsutil rm -r gs://${BUCKET_NAME}
 

knowledge base/homebrew.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # install/uninstall on os x
 /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
 /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"
@@ -21,7 +21,7 @@ brew bundle dump
 
 ## Configuration
 
-```shell
+```sh
 # require SHA check for casks
 # change cask installation dir to the Application folder in the user HOME
 export HOMEBREW_CASK_OPTS="--require-sha --appdir $HOME/Applications"

knowledge base/imagemagick.md

@@ -6,7 +6,7 @@ Components:
 
 ## TL;DR
 
-```shell
+```sh
 # scale an image to 50% its original size
 convert IMG_20200117_135049.jpg -adaptive-resize 50% IMG_20200117_135049_resized.jpg
 

knowledge base/iperf.md

@@ -1,6 +1,6 @@
 # Iperf
 
-```shell
+```sh
 # on the server
 iperf3 -s
 iperf3 -s -p 7575

knowledge base/iw.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Scan for available wireless networks.
 iw dev wlp scan
 

knowledge base/iwlist.md

@@ -4,7 +4,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Scan for networks.
 iwlist wlan0 scan
 ```

knowledge base/jdupes.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # prompt to delete all duplicate files
 jdupes -Zdr directory
 

knowledge base/jira.md

@@ -1,6 +1,6 @@
 # Jira
 
-```shell
+```sh
 # create a ticket
 curl https://${COMPANY}.atlassian.net/rest/api/2/issue \
   -D - \

knowledge base/jq.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # add a field
 jq --arg REGION ${AWS_REGION} '.spec.template.spec.containers[]?.env? += [{name: "AWS_REGION", value: $REGION}]' /tmp/service.kube.json
 

knowledge base/jsonpath.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # filter elements
 # only works on arrays, not on maps
 kubectl get serviceaccounts \

knowledge base/kapp.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Configurations picked up from a directory
 $ kapp deploy -a my-app -f ./examples/simple-app-example/config-1.yml
 

knowledge base/kde.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Get from '~/.config/kinfocenterrc' the current value for the 'MenuBar' key in
 # the 'MainWindow' group.
 kreadconfig5 --file kinfocenterrc --group MainWindow --key MenuBar

knowledge base/keda.md

@@ -51,7 +51,7 @@ KEDA offers a wide range of triggers (A.K.A. _scalers_) that can both detect if
 
 ### Helm chart
 
-```shell
+```sh
 # Installation.
 helm repo add kedacore https://kedacore.github.io/charts \
  && helm repo update kedacore \
@@ -67,7 +67,7 @@ helm uninstall keda --namespace keda \
 
 Use the YAML declaration (which includes the CRDs and all the other resources) available on the GitHub releases page:
 
-```shell
+```sh
 # Installation.
 kubectl apply -f https://github.com/kedacore/keda/releases/download/v2.0.0/keda-2.0.0.yaml
 
@@ -77,7 +77,7 @@ kubectl delete -f https://github.com/kedacore/keda/releases/download/v2.0.0/keda
 
 One can also use the tools in the repository:
 
-```shell
+```sh
 git clone https://github.com/kedacore/keda
 cd keda
 VERSION=2.0.0 make deploy    # installation
@@ -270,7 +270,7 @@ For details and updated information see KEDA's [External Scalers] page.
 
 Use the logs for the keda operator or apiserver:
 
-```shell
+```sh
 kubectl logs --namespace keda keda-operator-8488964969-sqbxq
 kubectl logs --namespace keda keda-operator-metrics-apiserver-5b488bc7f6-8vbpl
 ```
@@ -286,7 +286,7 @@ There is at the moment of writing no way to control which of the replicas get te
 
 Just run the following:
 
-```shell
+```sh
 kubectl delete -f https://raw.githubusercontent.com/kedacore/keda/main/config/crd/bases/keda.sh_scaledobjects.yaml
 kubectl delete -f https://raw.githubusercontent.com/kedacore/keda/main/config/crd/bases/keda.sh_scaledjobs.yaml
 kubectl delete -f https://raw.githubusercontent.com/kedacore/keda/main/config/crd/bases/keda.sh_triggerauthentications.yaml

knowledge base/keybase.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Start the services.
 run_keybase
 run_keybase -fg
@@ -62,19 +62,19 @@ Use the import form in [Keybase launches encrypted git], or:
 
 1. Create the remote repository:
 
-   ```shell
+   ```sh
    keybase git create dotfiles
    ```
 
 1. Copy the existing repository to a temporary directory:
 
-   ```shell
+   ```sh
    git clone --mirror https://github.com/user/dotfiles _tmp.git
    ```
 
 1. Push the contents of the old repository to the new one:
 
-   ```shell
+   ```sh
    git -C _tmp.git push --mirror keybase://private/user/dotfiles
    ```
 
@@ -89,7 +89,7 @@ Use `keybase oneshot` to establish a temporary device. The resulting process won
 
 `keybase oneshot` needs a username and a paperkey to work, either passed in via standard input, command-line flags, or environment variables:
 
-```shell
+```sh
 # Provide login information on the standard input.
 keybase oneshot
 

knowledge base/keychron.md

@@ -6,7 +6,7 @@
 
 1. ensure the `hid_apple` module is loaded
 
-   ```shell
+   ```sh
    sudo modprobe hid_apple
 
    # load at boot
@@ -15,7 +15,7 @@
 
 1. configure the keyboard's _fn mode_:
 
-   ```shell
+   ```sh
    echo 0 | sudo tee /sys/module/hid_apple/parameters/fnmode
 
    # load at boot

knowledge base/kubeval.md

@@ -4,7 +4,7 @@ Validates one or more Kubernetes configuration files.
 
 ## TL;DR
 
-```shell
+```sh
 $ kubeval my-invalid-rc.yaml || echo "Validation failed" >&2
 WARN - my-invalid-rc.yaml contains an invalid ReplicationController - spec.replicas: Invalid type. Expected: integer, given: string
 Validation failed

knowledge base/less.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Search words *forwards* in the current document.
 :/keyword <ENTER>
 

knowledge base/lxc.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # install lxc
 apt-get install lxc
 snap install lxd
@@ -44,7 +44,7 @@ man lxc.container.conf(5)
 
 ## Create new containers as unprivileged user
 
-```shell
+```sh
 # allow user vagrant to create up to 10 veth devices connected to the lxcbr0 bridge
 echo "vagrant veth lxcbr0 10" | sudo tee -a /etc/lxc/lxc-usernet
 ```

knowledge base/mac os x.md

@@ -14,7 +14,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Install a .pkg file from CLI.
 # 'target' needs to be a device, not a path.
 installer -pkg /path/to/non-root-package.pkg -target CurrentUserHomeDirectory
@@ -76,7 +76,7 @@ scutil --get ComputerName
 
 ## Xcode CLI tools
 
-```shell
+```sh
 xcode-select --install
 ```
 
@@ -84,7 +84,7 @@ The tools will be installed into `/Library/Developer/CommandLineTools` by defaul
 
 ### Headless installation
 
-```shell
+```sh
 # Force the `softwareupdate` utility to list the Command Line Tools.
 touch /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress
 
@@ -102,7 +102,7 @@ CLI_TOOLS_LABEL="$(/usr/sbin/softwareupdate -l \
 
 ### Removal
 
-```shell
+```sh
 sudo rm -rf $(xcode-select -p)
 sudo rm -rf /Library/Developer/CommandLineTools
 ```
@@ -111,7 +111,7 @@ sudo rm -rf /Library/Developer/CommandLineTools
 
 See [How to update Xcode from command line] for details.
 
-```shell
+```sh
 # Remove and reinstall.
 sudo rm -rf $(xcode-select -p)
 xcode-select --install
@@ -121,7 +121,7 @@ xcode-select --install
 
 > **Note:** once set something, you'll probably need to restart the dock with `killall Dock`
 
-```shell
+```sh
 # Show hidden apps indicators in the dock.
 defaults write com.apple.dock showhidden -bool TRUE
 
@@ -148,7 +148,7 @@ Note:
 * edits the input image
 * `-Z` retains ratio
 
-```shell
+```sh
 sips -Z 1000 Downloads/IMG_20190527_013903.jpg
 ```
 
@@ -176,7 +176,7 @@ Combination | Behaviour
 
 ## Update the OS from CLI
 
-```shell
+```sh
 # List all available updates.
 softwareupdate --list --all
 
@@ -201,7 +201,7 @@ Save a password with the following settings:
 
 > The password's value needs to be given **last**.
 
-```shell
+```sh
 # Add the password to the default keychain.
 security add-generic-password -a johnny -s github -w 'b.good'
 # Also give it some optional data.

knowledge base/macports.md

@@ -6,7 +6,7 @@ Default ports install location is `/opt/local`.
 
 ## TL;DR
 
-```shell
+```sh
 # get help on a command
 port help install
 port help select

knowledge base/magisk.md

@@ -12,14 +12,14 @@
 1. select the boot image; the Magisk app will patch the image to `[Internal Storage]/Download/magisk_patched_<random strings>.img`
 1. copy the patched image to your computer using the file transfer mode or `adb`:
 
-   ```shell
+   ```sh
    adb pull /sdcard/Download/magisk_patched_<random strings>.img
    ```
 
 1. reboot the device to the bootloader (fastboot)
 1. flash the modified boot image:
 
-   ```shell
+   ```sh
    sudo fastboot flash boot path/to/modified/boot.img
    ```
 

knowledge base/manjaro linux.md

@@ -12,7 +12,7 @@ One can use the [branch comparison] tool to check in what branch a package is av
 
 ## Printing
 
-```shell
+```sh
 pamac install manjaro-printer
 sudo gpasswd -a ${USER} sys
 sudo systemctl enable --now cups.service

knowledge base/mdl.md

@@ -4,7 +4,7 @@ Tool to check markdown files and flag style issues.
 
 ## TL;DR
 
-```shell
+```sh
 # Install.
 gem install mdl
 

knowledge base/microos.md

@@ -4,7 +4,7 @@
 
 Every set of changes to the underlying system is executed on a new inactive snapshot, which will be the one the system will boot into on the next reboot.
 
-```shell
+```sh
 # Upgrade the system.
 sudo transactional-update dup
 pkcon update

knowledge base/mktemp.md

@@ -4,7 +4,7 @@ Creates a unique temporary file or directory and returns the absolute path to it
 
 ## TL;DR
 
-```shell
+```sh
 # create an empty temporary file
 mktemp
 

knowledge base/mount samba shares from a unix client.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 sudo mount -t cifs -o user=my-user //nas.local/shared_folder local_folder
 ```
 

knowledge base/mount.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # by label
 mount -L seagate_2tb_usb /media/usb
 

knowledge base/mysql.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # connect with user "root" on the local default socket
 # don't ask password and do not select db
 mysql

knowledge base/nc.md

@@ -12,7 +12,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Check port 22 on hosts.
 nc -Nnvz 192.168.0.81 22
 parallel -j 0 "nc -Nnvz -w 2 192.168.0.{} 22 2>&1" ::: {2..254} | grep -v "timed out"

knowledge base/needs-restarting.md

@@ -4,7 +4,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Install.
 sudo dnf install dnf-utils
 sudo yum install yum-utils

knowledge base/nmap.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # scan all 65535 ports on a host
 nmap -p- 192.168.1.1
 

knowledge base/opensuse linux.md

@@ -20,7 +20,7 @@ Open port 22 on the firewall:
 
 - using [firewall-cmd][firewalld] on the command line:
 
-  ```shell
+  ```sh
   sudo firewall-cmd --add-port=22/tcp --permanent
   ```
 
@@ -29,7 +29,7 @@ Start the SSH daemon:
 - using Yast: open _Yast2_ > _System services_ and enable _SSHD_
 - using [systemctl][systemd] on the command line:
 
-  ```shell
+  ```sh
   sudo systemctl enable --now sshd.service
   ```
 
@@ -39,7 +39,7 @@ Install the OS from another computer capable of reading and writing SD cards.
 
 Given `/dev/sdb` being a SD card, use the following:
 
-```shell
+```sh
 curl -C - -L -o opensuse.raw.xz http://download.opensuse.org/ports/aarch64/tumbleweed/appliances/openSUSE-Tumbleweed-ARM-JeOS-raspberrypi.aarch64.raw.xz
 xzcat opensuse.raw.xz \
  | sudo dd bs=4M of=/dev/sdb iflag=fullblock oflag=direct status=progress \
@@ -52,7 +52,7 @@ Connect using SSH and login using `root:linux`.
 
 ### Firmware update from a running system
 
-```shell
+```sh
 # Check for an updated firmware.
 sudo rpi-eeprom-update
 

knowledge base/opkg.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # update the list of available packages
 opkg update
 

knowledge base/pacman.md

@@ -9,7 +9,7 @@ Useful options:
 
 ## TL;DR
 
-```shell
+```sh
 
 # search an installed package
 pacman --query --search ddc

knowledge base/pamac.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # check if updates are available (in aur too)
 pamac checkupdates --aur
 

knowledge base/parallel.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # group output (--group)
 # fill up cpu threads (--jobs 100%)
 # use newline as delimiter for the arguments in input

knowledge base/pdftk.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # combine multiple files
 pdftk file1.pdf file2.pdf file3.pdf cat output newfile.pdf
 

knowledge base/pi-hole.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # one-step automated install
 curl -sSL https://install.pi-hole.net | bash
 ```

knowledge base/pkexec.md

@@ -4,7 +4,7 @@ Allows an _authorized_ user to execute a command as another user. If a username
 
 ## TL;DR
 
-```shell
+```sh
 pkexec systemctl hibernate
 ```
 

knowledge base/pkgutil.md

@@ -8,7 +8,7 @@ Options are processed first, and affect the operation of all commands. Multiple
 
 ## TL;DR
 
-```shell
+```sh
 # list the package id of all installed packages
 pkgutil --pkgs
 pkgutil --packages --volume /

knowledge base/portage.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # System update.
 sudo emerge --sync
 sudo emerge --depclean --ask

knowledge base/postgresql.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # connect to a server
 psql --host "${HOSTNAME}" --port "${PORT:-5432}" "${DATABASENAME:-root}" "${USERNAME:-root}"
 ```

knowledge base/pre-commit.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # generate a very basic configuration
 pre-commit sample-config > .pre-commit-config.yaml
 

knowledge base/python.md

@@ -59,14 +59,14 @@ if __name__ == "__main__":
     serve(app, host="0.0.0.0", port=8080)
 ```
 
-```shell
+```sh
 pip install flask waitress
 python hello.py
 ```
 
 ## Maintenance
 
-```shell
+```sh
 # generate a list of all outdated packages
 pip list --outdated
 

knowledge base/raspberry pi os.md

@@ -8,7 +8,7 @@ Enable containerization features in the kernel to be able to run containers as i
 
 Add the following properties at the end of the line in `/boot/cmdline.txt`:
 
-```shell
+```sh
 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory
 ```
 
@@ -16,7 +16,7 @@ cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory
 
 Switch Debian firewall to legacy config:
 
-```shell
+```sh
 update-alternatives --set iptables  /usr/sbin/iptables-legacy
 update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
 ```

knowledge base/redis.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # debug the server
 redis-cli -h "${HOST}" -p "${PORT}" --user "${USERNAME}" --askpass MONITOR
 

knowledge base/reload a user's group assignments without logging out.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 exec su -l $USER
 ```
 

knowledge base/retrieve disk information.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 lshw -class disk
 smartctl -i /dev/sda
 hdparm -i /dev/sda

knowledge base/rpm.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # list all installed packages
 rpm --query --all
 

knowledge base/sddm.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # open a new window for every monitor you have connected and show a preview of the theme
 sddm-greeter --test-mode --theme /usr/share/sddm/themes/breeze
 ```

knowledge base/sed.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # Delete lines matching "OAM" from a file.
 sed -e '/OAM/d' -i .bash_history
 

knowledge base/send an email from cli.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 mail -s "Subject" recipient@mail.server
 echo "" | mail -a attachment.file -s "Subject" recipient@mail.server
 

knowledge base/set the ondemand cpu governor to not rise the frequencies for niced load.md

@@ -2,7 +2,7 @@
 
 ## TL:DR
 
-```shell
+```sh
 sudo cpupower frequency-set --governor ondemand
 echo 1 | sudo tee /sys/devices/system/cpu/cpufreq/ondemand/ignore_nice_load
 

knowledge base/shellcheck.md

@@ -4,7 +4,7 @@ Gives warnings and suggestions about `bash`/`sh` shell scripts.
 
 ## TL;DR
 
-```shell
+```sh
 shellcheck /path/to/script.sh
 ```
 

knowledge base/shred.md

@@ -2,6 +2,6 @@
 
 ## TL;DR
 
-```shell
+```sh
 shred --force --remove --verbose --zero file other-file
 ```

knowledge base/shuf.md

@@ -2,7 +2,7 @@
 
 ## TL;DR
 
-```shell
+```sh
 # randomize the order of lines in a file and output the result
 shuf filename