wiki-grav/pages/02.linux/users-and-groups/default.en.md

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title: "Users and Groups"
visible: true
---

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## Users

Check users by looking at `/etc/passwd`

### Add users

Basic usage:  
`# useradd -m (user)`

Important options:

```
login name -> by default
group -> -G //separate multiple by commas: group1,group2
with home dir -> -m
shell -> -s
full name -> -c
```

Example more complicated usage:  
`# useradd -m -c "Bruno Huber" -s /bin/bash -G sudo,systemd-journal bruhub`

### Remove user

The command `userdel` can be used to remove users from a system.  
Using it with the `-r` additionally deletes the user home directory and mail spool.  
`# userdel -r (user)`

### Add user to groups

Add user to more groups:  
`# usermod -a -G (group1),(group2) (user)`

Alternative command:  
`# gpasswd -a (user) (group)`

### Remove user from group

`# gpasswd -d (user) (group)`

## Groups

Check a user's groups with `id (user)`

### Create group

`# groupadd (group)`

### Rename group

`# groupmod -n (new_group) (old_group)`

### Delete group

`# groupdel (group)`