Unix/Sysadmin

Useful sysadmin-related tasks.

See also Deployment/New Node Checklist for some useful scripts and steps.

Users and Groups

To add groups:

groupadd ssl-certs

To add users:

useradd git

To modify users and add them to a group:

usermod -G ssl-certs git

Files and Permissions

Change group permissions of a file:

chgrp GROUP FILE