http://security.debian.org/dists/cosmic/Release 404 Not Found [IP: 151.101.184.204 80]
133
How can I fix a 404 Error when using a PPA or updating my package lists?
1520
How to install software or upgrade from an old unsupported release?
142018
How to download, modify, build and install a Debian source package?
1241
How to get Debian codename without lsb-release
39661
How to enable diffie-hellman-group1-sha1 key exchange on Debian 8.0?
68723
How to know the source repository of a package in debian?
112194
Debian 'ignores' /etc/network/if-pre-up.d/iptables
66694
Is there an apt command to download a deb file from the repositories to the current directory?
31052
How to download and install a .deb file
65
What can I do if a repository/PPA does not have a Release file?
7181
apt-get is stuck at "Fetched XXKb in XXsec"
29362
How do I install a single package from Debian testing or unstable on stable?
34016
Why is apt-get unable to locate bitcoin and bitcoin-qt package?
137182
Is there a standard way to create Debian packages for distributing Python programs?
17419
Installing Steam on Debian
60229
Failed to update Linux headers on debian stretch / Debian 9
19395
How can I install more recent versions of software than what Debian provides?