Configuring a custom hostname is important in many environments. This is easily done by editing the file
/opt/fmadio/etc/hostname
Step 1) Confirm current hosname
The default hostname looks similar to below
fmadio@fmadio200v4-636:/opt/fmadio/etc$ cat hostname
fmadio200v4-636
fmadio@fmadio200v4-636:/opt/fmadio/etc$
Step 2) Edit the hostname
Edit the file to update the hostname as required
sudo vi /opt/fmadio/etc/hostname
OR use nano
sudo nano /opt/fmadio/etc/hostname
Step 3) Reboot to ensure hostname is persistent
Reboot the system to ensure the name change is persistent
sudo reboot
NOTE: /etc/hostname is volatile and will not be changed between reboots. It requires updating of /opt/fmadio/etc/hostname