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$ sudo apt-get update
Err:13 xenial/main Sources
404 Not Found [IP: 80]
Ign:17 xenial/main amd64 Packages
Ign:20 xenial/main i386 Packages
Ign:22 xenial/main all Packages
Ign:23 xenial/main Translation-en_US
Ign:24 xenial/main Translation-en
Ign:25 xenial/main amd64 DEP-11 Metadata
Ign:26 xenial/main DEP-11 64x64 Icons
Fetched 204 kB in 12s (16.5 kB/s)
Reading package lists... Done
W: The repository ' xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch 404 Not Found [IP: 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
1) Comment line inside /etc/apt/sources.list where
These packages are not actual ubuntu source so we can comment it out.
2) replace
deb xenial main
deb-src xenial main
deb trusty main
deb-src trusty main
Since xenial package does not exist check here:
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