Held Packages error while trying to install ROS in Ubuntu 16.04 and 14.04
6809
How do I fix the GPG error "NO_PUBKEY"?
4450
How can I reproduce the error "package... needs to be reinstalled, but I can't find an archive for it" for testing?
92739
E: The repository 'http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu disco Release' does not have a Release file
133
How can I fix a 404 Error when using a PPA or updating my package lists?
119323
"Unable to locate package" errors for all software
31793
The following packages have unmet dependencies!
47780
How to install R on Ubuntu 16.04 Xenial?
129939
Unable to install .deb applications with ubuntu software
62476
E: Package '' has no installation candidate
30304
Shows "unable to locate package unzip" error
102559
How to install package from newer distribution?
86898
How to solve missing libmng.so.1 in Trusty (14.04) Package is no more available
107074
High Sierra - The path /System/Installation/Packages/OSInstall.mpkg appears to be missing or damaged
148120
Errors were encountered while processing Linux kernel packages
98844
upgrade 14.04 with errors and shows red sign on top
149984
Can't update or install anything. Ubuntu 3.11.0.14
29326
Can't install a package due to "Something wicked happened resolving" error