Getting "apt-get update does not have a Release file" and "Failed to fetch "during `apt-get update`
158674
How do I get `apt-get update` to work on a machine with no internet access and manually assigned IP address?
1632
How do I fix a "Failed to download package files" error?
56150
Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
22164
Problem with sudo apt get update: The repository cdrom... does not have a Release file
137317
libdvd-pkg: `apt-get check` failed, you may have broken packages. Aborting
54998
What does "apt-get install !!" do and how to make it work?
21184
Running "sudo apt-get update" returns connection errors
156977
Unable to install files with apt-get: "unable to locate package"
63320
Ubuntu repository does not have a Release file
80899
"no public key available" on apt-get update
95593
sudo apt-get update returns an error
24603
apt-get upgrade gives "403 forbidden" error
113442
apt-get not working on Ubuntu 16.04, problems with kernel packages
85009
`apt update` failed on Debian Linux
116035
Interrupting apt-get dist-upgrade: what could happen?
5877
"Failed to fetch" while updating
12534
14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed