# Groups & sudo — Linux

Source: https://www.geekswithgeeks.com/en/linux/linux-groups-sudo

> Organizing users, and granting admin rights safely.

## Groups

Groups let you grant the same permissions to many users at once. Add a user to a group with `usermod -aG`.

```bash
sudo groupadd devs
sudo usermod -aG devs bob
groups bob
```

Output:

```
bob : bob devs
```

## sudo — temporary superpowers

`sudo command` runs one command as root, after you authenticate with your own password. It's safer than logging in as root all the time.

## Handle /etc/sudoers carefully

Never edit `/etc/sudoers` directly — use `visudo`, which checks syntax before saving so you can't lock yourself out.