# Tips and Trics

## Hostname & FQDN

Make sure the hostname and fqdn are properly set. If this is not set properly this might result in performance
degradation or ghost services; for example Ceph Monitor, Manager and Metadata Servers.

```bash
$ hostname
pve0
$ hostname -f
pve0.siempie.local
$ hostname -d
siempie.local
```

## Maintenance mode

```shell
sudo ha-manager crm-command node-maintenance enable pve0
```

```shell
sudo ha-manager crm-command node-maintenance disable pve0
```

## Show running VMs

```shell
sudo qm list
```