When I was setting up some services for my homelab on my Proxmox machine, I was entering the same commands multiple times. So I wrote them down here to be able to quickly enter them again.

Create user with home directory and bash as shell

        
          sudo useradd -m -s /bin/bash username
        
      

Set password of new user

        
          sudo passwd username
        
      

Add user to sudo group

        
          sudo usermod -aG sudo username
        
      

Enable networking

Edit the file /etc/network/interfaces and add the contents:

        
          auto lo
          iface lo inet loopback

          auto eth0
          iface eth0 inet dhcp
        
        

Then restart the networking service:

        
          sudo service networking restart
        
        

Ubuntu 24.04 container

Ubuntu 24.04 uses netplan and the above setup will not work. To get internet to work, use these commands:

          
            sudo nano /etc/netplan/00-installer-config.yaml
          
          

Change the contents to:

            
              network:
                version: 2
                ethernets:
                  eth0:
                    dhcp4: true
                    dhcp6: false
                    optional: true
                    nameservers:
                      addresses:
                        - 10.10.10.102
            
          

Then apply:

            
              sudo netplan apply
            
          

Arch container

For arch, you first need to enable DHCP on your network interface. Edit the file /etc/systemd/network/20-wired.network and add the following contents:

        
[Match]
Name=eth0

[Network]
DHCP=yes
        
      

Then, enable and start the services, fix DNS, and restart networking:

        

# enable and start the services
systemctl enable systemd-networkd
systemctl enable systemd-resolved

systemctl start systemd-networkd
systemctl start systemd-resolved

# Fix DNS
ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf

# Restart networking
systemctl restart systemd-networkd
        
      

Populate keyring (Arch)

In a fresh Arch CT install, you also need to populate the keyring to be able to download packages:

        
pacman-key --init
pacman-key --populate archlinux
        
      

Install SSH server

        
          sudo apt update
          sudo apt install openssh-server
          sudo systemctl status sshd
        
      

Resizing LXC disk image

11-01-2026

I wanted to resize my Gitty LXC container disk image from 16G to 64G (So I could version control this website （*＾-＾*）).

On the proxmox host, stop the container and resize the image:

        
pct stop 109
pct resize 109 rootfs 64G
        
      

If you accidentally close the shell window too soon (like me <(＿　＿)>), you'll get this error:

TASK ERROR: got unexpected control message:
          

The disk image will be resized, but the filesystem will still show up as the original size. To fix this, with the container still stopped, activate the logical image of the container:

        
lvchange -ay VMs/vm-109-disk-0
        
      

Then resize the filesystem:

        
e2fsck -f /dev/VMs/vm-109-disk-0
resize2fs /dev/VMs/vm-109-disk-0