Installing from such repository can't be done securely
65
What can I do if a repository/PPA does not have a Release file?
64509
Can't update from official repositories [Error 409]
5565
How to fix Permission Denied (Public key) error?
8078
How do I install an individual package on a Linux system?
102559
How to install package from newer distribution?
69037
How to use https with apt-get?
45526
How can I install packages without starting their associated services?
85250
Skipping acquire of configured file 'xxxx' as repository 'xxxx xenial InRelease' doesn't support architecture 'i386'"
152027
how to install packages with apt-get on a system connected via proxy?
339
How to resolve "Failed to download repository information"?
49337
How to add repository from shell in Debian?
78822
What are install* eula* and hash code directories sitting on the root of my drive?
34069
Why am I getting authentication errors for packages from an Ubuntu repository?
135383
Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
151656
Installing from source. How to resolve dependencies without destroying the package manager
26745
Skipping acquire of configured file 'contrib/binary-i386/Packages' as repository ... doesn't support architecture 'i386'
59119
apt-get, unmet dependencies, ... "but it is not going to be installed"