tldr/pages/linux/usermod.md

# usermod

> Modify a user account.
> See also: `users`, `useradd`, `userdel`.
> More information: <https://manned.org/usermod>.

- Change a username:

`sudo usermod {{-l|--login}} {{new_username}} {{username}}`

- Change a user ID:

`sudo usermod {{-u|--uid}} {{id}} {{username}}`

- Change a user shell:

`sudo usermod {{-s|--shell}} {{path/to/shell}} {{username}}`

- Add a user to supplementary groups (mind the lack of whitespace):

`sudo usermod {{-a|--append}} {{-G|--groups}} {{group1,group2,...}} {{username}}`

- Change a user home directory:

`sudo usermod {{-m|--move-home}} {{-d|--home}} {{path/to/new_home}} {{username}}`