While running the sudo apt-get update on ubuntu 17.04 Zesty Zapus, I am getting the following error. I have posted on the error lines. I wanted to install python libraries like matplotlib and tkinter which failed to installed because above command wasn't running succesfully. Please suggest me what to do.
Err:9 http://security.ubuntu.com/ubuntu zesty-security/main amd64 Packages
404 Not Found [IP: 2001:67c:1560:8001::14 80]
Err:25 http://in.archive.ubuntu.com/ubuntu zesty/main i386 Packages
404 Not Found [IP: 2001:67c:1360:8001::21 80]
Err:81 http://in.archive.ubuntu.com/ubuntu zesty-updates/main amd64 Packages
404 Not Found [IP: 2001:67c:1360:8001::21 80]
Err:113 http://in.archive.ubuntu.com/ubuntu zesty-backports/main amd64 Packages
404 Not Found [IP: 2001:67c:1360:8001::21 80]
Reading package lists... Done
W: The repository 'http://security.ubuntu.com/ubuntu zesty-security 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.
W: The repository 'http://in.archive.ubuntu.com/ubuntu zesty 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.
W: The repository 'http://in.archive.ubuntu.com/ubuntu zesty-updates 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.
W: The repository 'http://in.archive.ubuntu.com/ubuntu zesty-backports 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 http://security.ubuntu.com/ubuntu/dists/zesty-security/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::14 80]
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/zesty/main/binary-i386/Packages 404 Not Found [IP: 2001:67c:1360:8001::21 80]
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/zesty-updates/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1360:8001::21 80]
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/zesty-backports/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1360:8001::21 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
you can solve it by: just replace us.archive.ubuntu.com and security.ubuntu.com in /etc/apt/sources.list with old-releases.ubuntu.com and then you'll be able to finish updating.
refer to source 1 and ubuntu forum
it work for me
In my case:
sed -e 's/archive.ubuntu.com/old-releases.ubuntu.com/g' -i /etc/apt/sources.list
sed -e 's/security.ubuntu.com/old-releases.ubuntu.com/g' -i /etc/apt/sources.list
In my case, I was able to download some of the packages by doing the following:
I had to replace "us.archive.ubuntu.com" and "security.ubuntu.com" in /etc/apt/sources.list WITH "old-releases.ubuntu.com" and then I was able to finish downloading some of the packages, like Ayush Kumar said.
For the other updates that were listed by my Hosting company, Linode, I used the following:
I had to use the --allow-unauthenticated flag with sudo apt-get update.
sudo apt-get update --allow-unauthenticated
Then I was able to finish updating.
17.04 isn't getting further support from Ubuntu. So, the solution that worked for me was to upgrade it to 17.10 as none other solutions helped.
来源：https://stackoverflow.com/questions/48377901/sudo-apt-get-update-fail-on-ubuntu-17-04