:How to install a package behind an overly restricted firewall
130904
Install programs without an internet connection on Debian
8078
How do I install an individual package on a Linux system?
22405
What does "You have requested package `foo', but the package provides `foo'." mean?
75879
How do I get add-apt-repository to work through a proxy?
78011
Unable to install package post adding ppa
90795
Do I need to activate the firewall? I only use Ubuntu for a home desktop use?
120762
How should I install the fullpage package under Ubuntu?
45045
What packages do i need to install on an ubuntu desktop for it to "become a server"?
70383
Blacklisting grub packages from installing
55940
How to bypass the "secure connection failed" warning in Firefox 33
41844
Package Install via Market sometimes fails and gives seemingly random error message
62412
How to install from unknown sources on AT&T?
26308
How to solve "Unable to find expected entry 'restricted/binary-1386/Packages' Wrong sources.list entry or malformed file"?
67117
How to install an unsafe APK after allowing Play Protect to block it?
92201
How to install snap packages behind web proxy on Ubuntu 16.04
16186
Requires installation of untrusted packages?
72142
How to install a package with apt without the "Do you want to continue [Y/n]?" prompt?