usermod

Modifies a user account.

See also: `users`, `useradd`, `userdel`.

• Change a username:

sudo usermod --login {new_username} {username}

• Change a user id:

sudo usermod --uid {id} {username}

• Change a user shell:

sudo usermod --shell {path/to/shell} {username}

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

sudo usermod --append --groups {group1,group2,...} {username}

• Change a user home directory:

sudo usermod --move-home --home {path/to/new_home} {username}

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