ubuntu version

ubuntu is released semi-annually.

Of these, one of the four releases has been released as a long-term support version.

This is "LTS".

ubuntu codename

Each version of ubuntu has a common name.

ubuntu 16.04 LTS (Xenial Xerus)

Xenial Xerus (Zenial Xerus)

Hospitality, friendly

Aragejirisu (Xerus rutilus)

Ground squirrel is a fellow squirrel

ubutnu 18.04 LTS (Bionic Beaver)

Bionic Beaver

Biotechnology, cyborg

Beaver

ubuntu 20.04 LTS (Focal Fossa)

Focal Fossa

Of focus

Fossa (living in Madagascar)

os-release

/etc/os-release

You can get information about ubuntu at.

$ cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal