Download Debian 9.4(64-bit PC Network installer)


Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run.

Debian provides more than a pure OS: it comes with over 51000 packages, precompiled software bundled up in a nice format for easy installation on your machine. Read more...

The latest stable release of Debian is 9.4. The last update to this release was made on March 10th, 2018. Read more about available versions of Debian.

Getting Started


[10 Mar 2018] Updated Debian 9: 9.4 released
[09 Dec 2017] Updated Debian 8: 8.10 released
[09 Dec 2017] Updated Debian 9: 9.3 released
[07 Oct 2017] Updated Debian 9: 9.2 released
[12 Aug 2017] DebConf17 closes in Montreal and DebConf18 dates announced
[22 Jul 2017] Updated Debian 9: 9.1 released

For older news items see the News Page. If you would like to receive mail whenever new Debian news comes out, subscribe to the debian-announce mailing list.

Security Advisories

[20 Apr 2018] DSA-4178 libreoffice - security update
[20 Apr 2018] DSA-4177 libsdl2-image - security update
[20 Apr 2018] DSA-4176 mysql-5.5 - security update
[18 Apr 2018] DSA-4175 freeplane - security update
[17 Apr 2018] DSA-4174 corosync - security update
[16 Apr 2018] DSA-4173 r-cran-readxl - security update
[14 Apr 2018] DSA-4172 perl - security update
[13 Apr 2018] DSA-4171 ruby-loofah - security update
[11 Apr 2018] DSA-4169 pcs - security update
[09 Apr 2018] DSA-4170 pjproject - security update

For older security advisories see the Security Page. If you would like to receive security advisories as soon as they're announced, subscribe to the debian-security-announce mailing list.