Cannot add PPA. Please check that the PPA name or format is correct
96145
Cannot Add PPA Behind Proxy Ubuntu 14.04
26308
How to solve "Unable to find expected entry 'restricted/binary-1386/Packages' Wrong sources.list entry or malformed file"?
73173
How to Fix Broken Packages?
6851
How do I install the ubuntu-restricted-extras package?
4598
"PKIX path building failed" and "unable to find valid certification path to requested target"
47335
Search Launchpad for PPAs matching software or package name?
74185
How can I add a PPA from a previous release?
6809
How do I fix the GPG error "NO_PUBKEY"?
152823
PPAs will not install "sudo: add-apt-repository: command not found"
1564
Error -504 on appliation installation
98449
Cannot add any images
119273
Code Sign error: a valid provisioning profile matching the application's Identifier ... could not be found
93030
dependency in ppa
46461
Unsupported software?
157379
Is there any limit to the number of PPA's I can add to the system? Why?
37152
Is there a PPA for the latest Blender version?
2280
Package system is broken. How to fix it?