feat: tagging in linux

.vscode/settings.json

@@ -42,6 +42,7 @@
         "freshclam",
         "gcloud",
         "getfacl",
+        "getfattr",
         "gettext",
         "gopass",
         "gpgconf",
@@ -96,6 +97,7 @@
         "runcmd",
         "scrollback",
         "setfacl",
+        "setfattr",
         "slurm",
         "sshfs",
         "sshpass",

knowledge base/linux/getfattr.md

@@ -0,0 +1,39 @@
+# `getfattr`
+
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Further readings](#further-readings)
+1. [Sources](#sources)
+
+## TL;DR
+
+```sh
+# Get values for specific extended attributes.
+getfattr -n 'name' 'path/to/file.1' … 'path/to/file.N'
+```
+
+## Further readings
+
+- [`setfattr`][setfattr]
+
+## Sources
+
+All the references in the [further readings] section, plus the following:
+
+- [`man` page][man page]
+- [Tag files in GNU/Linux]
+
+<!--
+  References
+  -->
+
+<!-- In-article sections -->
+[further readings]: #further-readings
+
+<!-- Knowledge base -->
+[setfattr]: setfattr.md
+[tag files in gnu/linux]: tag%20files.md
+
+<!-- Others -->
+[man page]: https://linux.die.net/man/1/getfattr

knowledge base/linux/setfattr.md

@@ -0,0 +1,42 @@
+# `setfattr`
+
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Further readings](#further-readings)
+1. [Sources](#sources)
+
+## TL;DR
+
+```sh
+# Add extended attributes.
+setfattr -n 'name' -v 'value' 'path/to/file.1' … 'path/to/file.N'
+
+# Remove extended attributes.
+setfattr -x 'name' 'path/to/file.1' … 'path/to/file.N'
+```
+
+## Further readings
+
+- [`getfattr`][getfattr]
+
+## Sources
+
+All the references in the [further readings] section, plus the following:
+
+- [`man` page][man page]
+- [Tag files in GNU/Linux]
+
+<!--
+  References
+  -->
+
+<!-- In-article sections -->
+[further readings]: #further-readings
+
+<!-- Knowledge base -->
+[getfattr]: getfattr.md
+[tag files in gnu/linux]: tag%20files.md
+
+<!-- Others -->
+[man page]: https://linux.die.net/man/1/setfattr

knowledge base/linux/tag files.md

@@ -0,0 +1,22 @@
+# Tag files in GNU/Linux
+
+The more native way is to use extended attributes.<br/>
+This allows to store the information within the file in its "filesystem entry", and it stays with the file when one moves it on the drive.
+
+Query them with [`getfattr`][getfattr].<br/>
+Set, modify and remove them using [`setfattr`][setfattr].
+
+## Sources
+
+- [How to tag any file on the Unix system?]
+
+<!--
+  References
+  -->
+
+<!-- Knowledge base -->
+[getfattr]: getfattr.md
+[setfattr]: setfattr.md
+
+<!-- Others -->
+[how to tag any file on the unix system?]: https://unix.stackexchange.com/questions/683017/how-to-tag-any-file-on-the-unix-system