Lsb release
lastmod 2023-07-21created 2020-09-014 edits
LSB
LSB means: The lsb_release command prints certain LSB (Linux Standard Base) and Distribution infomation.
Checking the Linux distribution
Or check it as follows.
Linux Distribution Detection
See Linux#Distribution Detection for details on how to check the Linux distribution.
Upgrading the OS to the latest version
Use do-release-upgrade.