Does software that has been built for older versions of Ubuntu run on newer versions?
16782
Install packages from newer release without building (apt pinning)
54368
How do you run a 32-bit program on a 64-bit version of Ubuntu?
28763
Where can find older versions of Apps?
105208
How can I check if a PPA has packages for another Ubuntu version?
81434
support time of other Ubuntu LTS flavours?
75380
upgrading glibc to a version at least 2.17 or higher in ubuntu 12.04 LTS?
30191
How do I compare version numbers in Python?
93420
Is Ubuntu 32-bit only for systems with "less than 2GB RAM"?
123413
Will apt-get dist-upgrade upgrade my system to a newer version?
50553
Can I mix sources from different ubuntu versions?
119943
Where can I find a repository for older unsupported releases?
134786
Why doesn't Ubuntu ship an application, or the latest versions of some applications?
12578
How do I upgrade to a newer version of Ubuntu?
2040
How to run 32-bit app in Ubuntu 64-bit?
144175
How do I install and keep updated with the most recent versions of Blender on Ubuntu?
23781
Incompatible Software for next OSX?
41519
What can I do if a package is not available on the newest version of Ubuntu (18.04) but is available on older versions?