lsb_release
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial
a$ lsb_release --help
Usage: lsb_release [options]
Options:
-h, --help show this help message and exit
-v, --version show LSB modules this system supports
-i, --id show distributor ID
-d, --description show description of this distribution
-r, --release show release number of this distribution
-c, --codename show code name of this distribution
-a, --all show all of the above information
-s, --short show requested information in short format
