My now looks like this: deb oneiric main deb-src oneiric main deb oneiric-updates main deb-src oneiric-updates main deb oneiric universe deb-src oneiric universe deb oneiric-updates universe deb-src oneiric-updates universe deb oneiric-security main deb-src oneiric-security main deb oneiric-security universe deb-src oneiric-security universe work for Ubuntu releases as old as 4.10 (warty), though I haven't tested this.You can avoid this problem in the future by using only LTS (long term support) releases which are supported for 5 years. I have an old PC which haven't been used for like 10 years, and it's birth is 1999.
What makes this program “advanced” is its approach to packages.When an old copy of these files is already present, APT can update it by only downloading the differences (see sidebar is the fast and efficient traditional Unix utility to compress files.Newer tools achieve better rates of compression but require more resources (computation time and memory) to compress and uncompress a file.Stallman and keeps the Free Software Foundation from recommending Debian to users. Contrary to other entries, a CD-ROM is not always available since it has to be inserted into the drive and since only one disc can be read at a time.For those reasons, these sources are managed in a slightly different way, and need to be added with the # Security updates deb jessie/updates main contrib non-free deb-src jessie/updates main contrib non-free ## Debian mirror # Base repository deb jessie main contrib non-free deb-src jessie main contrib non-free # Stable updates deb jessie-updates main contrib non-free deb-src jessie-updates main contrib non-free # Stable backports deb jessie-backports main contrib non-free deb-src jessie-backports main contrib non-free Most packages will come from the “base repository” which contains all packages but is seldom updated (about once every 2 months for a “point release”).Replacing all occurrences of archive.and security.with old-releases.in the etc/apt/file was the missing piece of the puzzle to get the pesky warning triangle to disappear from the upper panel in my no-longer-supported Ubuntu 10.04 Lucid Lynx installation. I wanted to test if it still work and it did, even with newest Debian 9.1.