# 5.2 Managing Groups Using CLI

To give rights to individual users is a lot of work, so administrators tend to devide users into groups to create a system called "Role Based Access abreviated", or **RBAC**.

### Adding groups and setting passwords
This will teach you how to create groups and add users to these groups.

We want to add the group **suicidesquad** with the members **Romeo** and **Juliet**

And add the group **deadgreeks** with the members **Plato** and **Aristotle**

Let's become root for this exersise.
```bash
su - root
```

Let's add the group **suicidesquad** with a group id of **30000** to the machine.
```bash
groupadd -g 30000 suicidesquad
```

Let's create the group **deadgreeks** to the machine
```bash
groupadd deadgreeks
```

Check if the groups exist:
```bash
[root@rhcsa ~]# tail -3 /etc/group
aristotle:x:1006:
suicidesquad:x:30000:
deadgreeks:x:30001:
```

The groups where added at the bottom of the /etc/group file. This file stores all the groups. Also, see that the group id or **GID** has been set and that the next added group followed the highest number.

### Add users to groups
Now we must add the users to their respective groups and their final fate.
```bash
usermod -G suicidesquad juliet
```

The capital G adds the user to the group, but as their secondary group. This will not replace the primairy group and therefore Juliet is still part of the group. Juliet and the group **suicidesquad** membership were added.
You can check this with the **id** command.
```bash
id juliet
```

```bash
[root@rhcsa ~]# id juliet
uid=1003(juliet) gid=1003(juliet) groups=1003(juliet),30000(suicidesquad)
```

And check the **/etc/group** file.
```bash
tail -3 /etc/group
```
```bash
[root@rhcsa ~]# tail -3 /etc/group
aristotle:x:1006:
suicidesquad:x:30000:juliet
deadgreeks:x:30001:
```

### Practice Question
Now do the following on your own and check your results. This simulates a question on the Red Hat exam.

Add the following users to their groups.

To **suicidesquad**
- Romeo

To **deadgreeks**
- Plato
- Aristotle
- Theireconomy