# 10.2 Host names

Checking and changing the hostname is done of 2 basic commands.
```hostname``` to check the hostname and ```hostnamectl``` to control, change and check the hostname.

### Checking the hostname
Display the current host name.
```bash
hostname
```

Result:
```bash
[root@rhcsa ~]# hostname
rhcsa.greateracademy.local
```

Or with ```hostnamectl```.
```bash
hostnamectl status
```

Result will look similiar to this:
```bash
[root@rhcsa ~]# hostnamectl status
   Static hostname: rhcsa.greateracademy.local
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 761eb1a7c2cc48198712a57c9f7cccc4
           Boot ID: 677a772e4c7c4bc8a8b9953bc5444b05
    Virtualization: kvm
  Operating System: CentOS Linux 8 (Core)
       CPE OS Name: cpe:/o:centos:centos:8
            Kernel: Linux 4.18.0-80.el8.x86_64
      Architecture: x86-64
```
This gives a lot of information as you can see. The most important information for us is the ```Static hostname: rhcsa.greateracademy.local``` this is the FQDN (Fully Qualified Domain Name) which means hostname ```rhcsa``` together with the domain name ```greateracademy.local```.

### Changing the hostname
Set a static hostname to match the current transient hostname.

Change the host name to ```rhcsa[xx].greateracademy.local``` Replace the **X** with your student number.
```bash
hostnamectl set-hostname rhcsa.greateracademy.local
```

View the configuration file providing the hostname at network start.
```bash
cat /etc/hostname
```

```bash
hostname
```

Display the hostname status at a config file:
```bash
[root@rhcsa ~]# hostname
rhcsa
```

Or with the ```hostnamectl``` command:
```bash
[root@rhcsa ~]# hostnamectl status
   Static hostname: rhcsa.greateracademy.local
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 761eb1a7c2cc48198712a57c9f7cccc4
           Boot ID: 677a772e4c7c4bc8a8b9953bc5444b05
    Virtualization: kvm
  Operating System: CentOS Linux 8 (Core)
       CPE OS Name: cpe:/o:centos:centos:8
            Kernel: Linux 4.18.0-80.el8.x86_64
      Architecture: x86-64
```