tldr/pages/linux/usermod.md

usermod

Modifies a user account.

• Change a user's name:

usermod -l {{newname}} {{user}}

• Add user to supplementary groups (mind the whitespace):

usermod -a -G {{group1,group2}} {{user}}

• Create a new home directory for a user and move their files to it:

usermod -m -d {{/path/to/home}} {{user}}