Reading package lists... Error! GPG error and problem with Mergelist
4305
How do I fix a "Problem with MergeList" or "status file could not be parsed" error when trying to do an update?
102747
Debian 9, APT, and "GPG error: ... InRelease: The following signatures were invalid:"
93942
How to fix "Failed to download repository information" error while updating?
56132
"E:Malformed line 1 in source list /etc/apt/sources.list.d/medibuntu.list (type),"
135985
Apt-get saying "Unable to correct problems, you have held broken packages."
96143
How to resolve "dpkg: error processing /var/cache/apt/archives/python-apport_2.0.1-0ubuntu9_all.deb"?
86185
How to install a list of packages using apt-get?
119323
"Unable to locate package" errors for all software
13744
sudo apt-get update failing - "could not open" list file due to "permission denied"
154248
How to see all packages in a package repository? Website or command line?
115648
dpkg exit with error "cannot scan updates directory `/var/lib/dpkg/updates/': No such file or directory", how to fix it?
19565
Restore default apt repositories in sources.list from command line
55857
How do I get a list of obsolete packages?
65341
dpkg reports problems configuring huge list of python-related packages after any APT command
135055
Why does dpkg --list no longer show all installed programs?
13054
Failing package manager?
110971
How can I get a list of all packages in a repository section from command line?