R update from 3.0 to 3.1 but all packages remain in 3.0
6568
Migrating R libraries
109624
How do I tell apt to never upgrade a particular package?
1520
How to install software or upgrade from an old unsupported release?
126343
How to downgrade a package via apt-get?
41054
How can I check the available version of a package in the repositories?
117112
Why isn't Ubuntu moving its repositories to old-releases anymore?
121201
Why can't I update applications without upgrading the whole OS?
131490
How do I save Updates/Installed Packages?
102559
How to install package from newer distribution?
95336
Installing particular versions when repo has newer versions?
8197
R.java can't be modified
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?
50317
How do I reinstall a base-R package (e.g., stats, graphics, utils, etc.)?
72082
Is using Software Updater the same thing as running apt-get update and apt-get upgrade?
421
How do I update a Drupal distribution to a newer version?
44613
PPA & Packaging: Having versions of packages for multiple distros
149428
How do I refresh the package list?