Why isn't Mozilla SeaMonkey available in the repositories? How can I install it?
134786
Why doesn't Ubuntu ship an application, or the latest versions of some applications?
43157
How do I install the Tor Browser Bundle in Ubuntu?
65
What can I do if a repository/PPA does not have a Release file?
5378
How can I install Sun/Oracle's proprietary Java JDK 6/7/8 or JRE?
46419
The repository 'http://dl.google.com/linux/chrome/deb stable Release' does not have a Release file
37211
What do I do if I don't have a META-INF folder or minecraft.jar?
151920
How to get the official, non-development version of Focal Fossa 20.04
129029
Where to get the full offline-capable installer for macOS Mojave (.1 update)?
28753
How do I install the latest Mesa release?
144663
Downloading Eclipse plug-in update sites for offline installation
9723
How do I install software using the Ubuntu Software Center?
6809
How do I fix the GPG error "NO_PUBKEY"?
107247
Firefox application associations not working in the 'Downloads' window
135555
Is Ubuntu's archive signing key available via HTTPS somewhere?
23826
How do I fix a "Unknown configuration key `foreign-architecture' found in your `dpkg' configuration files." error?
21617
Why can't I press the Install button when installing applications from unknown sources?
73465
How to install Scratch 2 on Ubuntu 16.10. or 17.04 (64bit)?