ansible
Ansible
Agentless automation over SSH. No agents to install on managed nodes -- just Python on targets and SSH access. All modules are idempotent by default: running a playbook twice produces the same result.
Ad-Hoc Commands
# Ping all hosts
ansible all -m ping
# Run command on web servers
ansible webservers -m command -a "uptime"
ansible webservers -m shell -a "df -h | grep /dev/sda"
# Copy file
ansible webservers -m copy -a "src=./app.conf dest=/etc/app.conf owner=root mode=0644"
# Install package
ansible webservers -m apt -a "name=nginx state=present" --become
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