Installing 14.04, getting "???" error
14954
Dual-Boot Ubuntu 14.04 and Windows 7 on FakeRAID Installation error - question marks "????..."
76165
Unmet dependencies: not configured yet
137762
Unknown error code during application install "-24"
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?
140893
Error when using apt-get update
6079
Ubuntu 14.04 "[Errno 5] Input/output error" during Installation
12773
The requested package is unknown
119323
"Unable to locate package" errors for all software
1564
Error -504 on appliation installation
32220
How to resolve Unmet dependencies error?
16186
Requires installation of untrusted packages?
41844
Package Install via Market sometimes fails and gives seemingly random error message
12534
14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed
3275
I can't seem to install Ubuntu 16.04.2
135692
ubuntu 14.04 black screen when installing
102559
How to install package from newer distribution?
249
How do I fix this "E: Type '*' is not known on line * in source list ..." update error?