10 pillars of IT security:
1. Sanitize Inputs
2. Audit services
3. Backups onsite && ofsite , test backups
4. Principle of least privileges (no one logs as root, ever)
5. Zero trust networks, 2FA
6. Key-based authetification
In case you accidentally commit file you did not want, e.g. .swp from vim use:
git rm unwanted_file.swp
Check if file does not appear anymoregit commit --amend
Export and Import packages list
Exportdpkg --get-selections
Importdpkt --set-selections
In order to issue direct command on server via ansible:
ansible [pattern] -m [module] -a "[module options]" ansible webservers -e "ansible_user=root" -m shell -a "/etc/init.d/nginx restart"