Your main adminsys goes away of your company. Are you sure all his ssh access are revoked? What about the interns? The consultants?... Let's fix this!
Provide command and actions history (by users)
Test the 5 minutes Debian 12 installation :
bash <(curl -s https://raw.githubusercontent.com/librit/passhport/master/tools/install/install_debian_12.sh)