How can I tell what version of Ubuntu I am running?

root@apache:/etc/update-manager# lsb_release -a
No LSB modules are available.

root@apache:/etc/update-manager# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.10
Release:        20.10
Codename:       groovy

root@apache:/etc/update-manager# hostnamectl
   Static hostname: apache
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 9674af04f3674694840f7f38a50fc86e
           Boot ID: 3c913cb7606345e79012dfe83fa58791
    Virtualization: vmware
  Operating System: Ubuntu 20.10
            Kernel: Linux 5.8.0-63-generic
      Architecture: x86-64