---
title: 'Users and Groups'
---

[toc]
## 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)`