Debian Version History

Production releases

Version	Code Name	Release Date	End of Life Date
8.0	Jessie	April 25th 2015
7.0	Wheezy	May 4th 2013
6.0	Squeeze	February 6th 2011	February (LTS)
5.0	Lenny	February 14th 2009	February 6th 2012
4.0	Etch	APR 8th 2007	February 15th 2010
3.1	Sarge	June 6th 2005	March 31st 2008
3.0	Woody	July 19th 2002	June 30th 2006
2.2	Potato	August 15th 2000	June 30th 2003
2.1	Slink	March 9th 1999	October 30th 2000
2.0	Hamm	July 24th 1998	-
1.3	Bo	July 2nd 1997	-
1.2	Rex	December 12th 1996	-
1.1	Buzz	June 17th 1996	-
0.93r6		October 26 1995	-
0.93r5		March 1995	-
0.91		January 1994

Https://wiki.debian.org/DebianReleases

How do I confirm the release version of the current system?

Lsb_release-a can be seen directly.

Debian Version History