What is Ubuntu

Ubuntu is a free and open source operating system based on Linux.
It is also based on Debian and uses the dpkg and apt systems for managing packages.

Support

The support channel on IRC is #ubuntu on irc.freenode.net
Ubuntu also has a forum http://www.askubuntu.com

Naming Scheme and LTS/non-LTS Versions

The naming of the versions uses the release year and release month. For instance Ubuntu 16.04 means it was released on April 2016.

Ubuntu has 2 types of versions of operating systems it releases based on different time intervals.

The LTS (Long Term Support) versions are released every 2 years, and they're supported for 5 years.
The other versions are released between the LTS versions, and they're supported for 9 months.
The naming and versions are listed below
Ubuntu 14.04 is an LTS version
Ubuntu 14.10 is a regular version
Ubuntu 15.04 is a regular version
Ubuntu 15.10 is a regular version
Ubuntu 16.04 is an LTS version
Ubuntu 16.10 is a regular version
Ubuntu 17.04 is a regular version
Ubuntu 17.10 is a regular version
Ubuntu 18.04 when released will be an LTS version
and so on

Since Ubuntu 15.04, Ubuntu has adopted systemd which is a new init system.


RELATED TOPICS
BIOS, UEFI, Live USB