sudo apt-get update error etc/apt/sources.list.d/signal-xenial.list
65
What can I do if a repository/PPA does not have a Release file?
11909
404 error with apt-get update, Don't have any PPA's
93246
How to resolve conflicting distributions in apt-get
13744
sudo apt-get update failing - "could not open" list file due to "permission denied"
113145
What does 'apt-get install update' do?
40885
What should I do when I got the KEYEXPIRED error message after an apt-get update?
135985
Apt-get saying "Unable to correct problems, you have held broken packages."
114246
apt-get update, unlinking
121462
Fixing a broken packet system (apt-get)
107009
ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
17208
What does this apt error message ("Download is performed unsandboxed as root...") mean?
28650
`apt-get update` cannot find Ubuntu servers
59119
apt-get, unmet dependencies, ... "but it is not going to be installed"
97588
sudo apt-get 'NOSPLIT Error'
84803
sudo apt get update gives error - The package cache file is corrupted
157904
error 503: service unavailable when using apt-get update behind proxy
138125
dpkg: error: cannot scan updates directory `/var/lib/dpkg/updates/'