Why is access to the proxmox web face lost if I rename the host?

Question

Proxmox

Hello!
Tell me why access to the web interface is lost if you change the computer name via ssh in hostname?
After the change, there is no access.
If you return everything back, then it works.
the service seems to work because port 8006 is open without web access.
What didn't you do?

Answer 1

because the webmord inside is tied to the hostname
on the site and the proxmox forum a lot of information how to change the hostname on the proxmox host what configs and where to fix

Answer 2

I lost access to the web interface after editing the /etc/fstab file, where I added a mounted partition:
/dev/sdb1 /system/sdb1 ext4 defaults 1 2
Here's what it looked like:
#
/dev/pve/root / ext4 errors= remount-ro 0 1
/dev/pve/swap none swap sw 0 0 proc
/proc proc defaults 0 0
/dev/sdb1 /system/sdb1 ext4 defaults 1 2