Ad-hoc ping all hosts ansible
Check connectivity to all hosts in inventory
ansible all -i inventory -m ping
more ansible
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Ad-hoc run shell command
ansible all -i inventory -m shell -a 'uptime'
Ad-hoc copy file
ansible all -i inventory -m copy -a 'src=./file dest=/tmp/file'
Gather facts from host
ansible <host> -i inventory -m setup | jq '._ansible_facts'
Encrypt variable with vault
ansible-vault encrypt_string 'secret_value' --name 'db_password'
Encrypt file with vault
ansible-vault encrypt vars/secrets.yml