diff --git a/knowledge base/ansible.md b/knowledge base/ansible.md
index 67b9c3d..b838495 100644
--- a/knowledge base/ansible.md	
+++ b/knowledge base/ansible.md	
@@ -40,7 +40,7 @@ pip3 install --user 'ansible'
 brew install 'ansible' 'sshpass'         # darwin
 sudo pamac install 'ansible' 'sshpass'   # manjaro linux
 
-# Generate an example configuration file with all entries disabled.
+# Generate example configuration files with entries disabled.
 ansible-config init --disabled > 'ansible.cfg'
 ansible-config init --disabled -t 'all' > 'ansible.cfg'
 
@@ -49,6 +49,11 @@ ansible -i 'path/to/hosts/file' -m 'setup' all
 ansible -i 'host1,hostN,' -m 'setup' 'host1' -u 'remote-user'
 ansible -i 'localhost,' -c 'local' -km 'setup' 'localhost'
 
+# List hosts.
+ansible-inventory -i 'inventory' --list
+ansible-playbook -i 'inventory' 'playbook.yml' --list-hosts
+ansible -i 'inventory' all --list-hosts
+
 # Check the syntax of a playbook.
 # This will *not* execute the plays inside it.
 ansible-playbook 'path/to/playbook.yml' --syntax-check
@@ -56,7 +61,7 @@ ansible-playbook 'path/to/playbook.yml' --syntax-check
 # Execute playbooks.
 ansible-playbook 'path/to/playbook.yml' -i 'hosts.list'
 ansible-playbook … -i 'host1,host2,hostN,' -l 'hosts,list'
-ansible-playbook … -i 'host1,host2,other,' -l 'hosts-pattern'
+ansible-playbook … -i 'host1,host2,other,' -l 'hosts-pattern' --step
 
 # Show what changes (with details) a play would apply to the local machine.
 ansible-playbook 'path/to/playbook.yml' -i 'localhost,' -c 'local' -vvC
diff --git a/snippets/ansible.sh b/snippets/ansible.sh
new file mode 100644
index 0000000..bdf63bd
--- /dev/null
+++ b/snippets/ansible.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/env sh
+
+# Generate example configuration files with entries disabled.
+ansible-config init --disabled > 'ansible.cfg'
+ansible-config init --disabled -t 'all' > 'ansible.cfg'
+
+# List hosts.
+ansible-inventory -i 'aws_ec2.yml' --list
+ansible-playbook -i 'self-hosting.yml' 'gitlab.yml' --list-hosts
+ansible -i 'webservers.yml' all --list-hosts
+
+# Show hosts' ansible facts.
+ansible -i 'inventory.yml' -m 'setup' all
+ansible -i '192.168.1.34,gitlab.lan,' -m 'setup' 'gitlab.lan' -u 'admin'
+ansible -i 'localhost,' -c 'local' -km 'setup' 'localhost'
+
+# List tasks what would be executed.
+ansible-playbook 'gitlab.yml' --list-tasks
+ansible-playbook 'gitlab.yml' --list-tasks --tags 'configuration,packages'
+ansible-playbook 'gitlab.yml' --list-tasks --skip-tags 'system,user'
+
+# Create new roles.
+ansible-galaxy init 'gitlab'
+ansible-galaxy role init --type 'container' --init-path 'gitlab' 'name'
+
+# Apply changes.
+ansible-playbook \
+	-i 'aws_ec2.yml' -e 'ansible_aws_ssm_plugin=/usr/local/sessionmanagerplugin/bin/session-manager-plugin' \
+	-D --step \
+	'gitlab.yml'