sudo apt-get update error in Ubuntu 18.04
120
How do I restore the default repositories?
156977
Unable to install files with apt-get: "unable to locate package"
22164
Problem with sudo apt get update: The repository cdrom... does not have a Release file
106931
How to undo sudo add-apt-repository?
117623
Why do I need root-privileges to update my package manager's package list?
106436
Long list of Hit and Get from sudo apt update
66065
"Unable to connect" error with apt-get?
16753
Why should I regularly run 'apt-get update' and similar commands?
144214
Debian 8 apt-get update showing 404 Not Found
94171
Why Does Software Updater Say No updates Available, but apt-get upgrade Shows updates available?
49512
Difference between 'sudo apt-get' and 'sudo -E apt-get'
49149
How do I solve "Unable to fetch some archives, maybe run apt-get update or try with --fix-missing" error?
157904
error 503: service unavailable when using apt-get update behind proxy
13399
Why can I no longer (un)install packages via apt-get after doing a partial dist-upgrade?
105770
Cannot use apt-get/dpkg -- Input/output error
16578
How to upgrade a single package using apt-get?
69960
What is sudo apt-get -f install?