List inventory hosts

Show all hosts and groups parsed from inventory

ansible-inventory -i inventory --list | jq 'keys'

More ansible commands

Run with extra vars

ansible-playbook playbook.yml -e 'env=prod version=2.0'

Pass extra variables at runtime overriding playbook defaults
Verbose output

ansible-playbook playbook.yml -vvv

Maximum verbosity — shows every task, connection, output
Syntax check playbook

ansible-playbook playbook.yml --syntax-check

Validate YAML syntax without executing any tasks
Ad-hoc ping all hosts

ansible all -m ping -i inventory.ini

Check SSH connectivity and Python for all hosts
Run shell command on group

ansible webservers -m shell -a 'uptime && free -h' -i inventory.ini

Run a shell command on all hosts in the webservers group