tldr/pages/linux/usermod.md

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# usermod
> Modifies a user account.
> See also: `users`, `useradd`, `userdel`.
> More information: <https://manned.org/usermod>.
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- Change a username:
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`sudo usermod --login {{new_username}} {{username}}`
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- Change a user ID:
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`sudo usermod --uid {{id}} {{username}}`
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- Change a user shell:
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`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}}`