Using Debian Long Term Support (LTS)
Important: Debian 9 stretch LTS only supports i386, amd64, arm64, armel and armhf. Users of other architectures are encouraged to upgrade to Debian 10 buster.
The current LTS version is Debian 9 stretch and will be supported from 2020-07-06 to 2022-06-30. To receive security updates, your /etc/apt/sources.list should look like this one:
deb http://deb.debian.org/debian/ stretch main contrib non-free deb-src http://deb.debian.org/debian/ stretch main contrib non-free deb http://security.debian.org/ stretch/updates main contrib non-free deb-src http://security.debian.org/ stretch/updates main contrib non-free
To follow security announcements, you may also want to subscribe to the debian-lts-announce mailing list.
Recommendations for upgrading from jessie LTS to stretch LTS
Update your /etc/apt/sources.list according to the list above.
Update your system. apt-get update
Upgrade your system. apt upgrade
Upgrade your system and remove obsolete packages. apt dist-upgrade
- Carefully check all debconf prompts and update configuration files as needed.
You can add other repositories.
If you want more info on which mirrors to use, read debian mirrors.
Check for unsupported packages
Not all packages of the Debian archive are supported by LTS. To check whether you have unsupported packages installed on your machine, please install the debian-security-support package (use the version in stretch, unstable will not work as expected). A check for new unsupported packages is run every time packages are installed. You can also run the 'check-support-status' utility manually to get a list of all unsupported packages installed on your system.
What can I do if security support for a package has ended?
You can choose between different options:
- Remove the unmaintained package.
- Keep the software and make sure, that neither already known nor new security issues affect your system.