"E: The list of sources could not be read." while trying to update
249
How do I fix this "E: Type '*' is not known on line * in source list ..." update error?
10023
'Some index files failed to download' while updating
74990
Error while trying to upgrade from Ubuntu 18.04 to 18.10: "Please install all available updates for your release before upgrading."
26496
"yum update" error. How to handle this?
10633
software updater failed to download repository information
93942
How to fix "Failed to download repository information" error while updating?
77705
Unable to upgrade in ubuntu
144507
No facility exists in Update Manager to upgrade to a new version, why?
64744
Restarted computer during update; "the system network service is not compatible with this version"
90937
apt-get update errors
94621
archive.ubuntu.com missing raring-updates
154420
"Failed to download repository information" error
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you
123083
sources.list file missing
56132
"E:Malformed line 1 in source list /etc/apt/sources.list.d/medibuntu.list (type),"
97771
"The package lists or status file could not be parsed or opened"
157904
error 503: service unavailable when using apt-get update behind proxy