apt-get update
Hit:1 https://repos.sonar.digitalocean.com/apt main InRelease
Ign:2 http://mirrors.digitalocean.com/ubuntu cosmic InRelease
Ign:3 http://mirrors.digitalocean.com/ubuntu cosmic-updates InRelease
Ign:4 http://mirrors.digitalocean.com/ubuntu cosmic-backports InRelease
Err:5 http://mirrors.digitalocean.com/ubuntu cosmic Release
404 Not Found [IP: 104.24.116.209 80]
Err:6 http://mirrors.digitalocean.com/ubuntu cosmic-updates Release
404 Not Found [IP: 104.24.116.209 80]
Err:7 http://mirrors.digitalocean.com/ubuntu cosmic-backports Release
404 Not Found [IP: 104.24.116.209 80]
Ign:8 http://security.ubuntu.com/ubuntu cosmic-security InRelease
Err:9 http://security.ubuntu.com/ubuntu cosmic-security Release
404 Not Found [IP: 91.189.91.39 80]
Hit:10 http://ppa.launchpad.net/certbot/certbot/ubuntu cosmic InRelease
Reading package lists... Done
E: The repository 'http://mirrors.digitalocean.com/ubuntu cosmic Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://mirrors.digitalocean.com/ubuntu cosmic-updates Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://mirrors.digitalocean.com/ubuntu cosmic-backports Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://security.ubuntu.com/ubuntu cosmic-security Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
I know Ubuntu 18.10 is no more supported, but how can I update my source and get 19.04 installed
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Highly recommend migrating anything running 18.10 to a current LTS as soon as possible. However if anyone is still needing this…
Extending on alexdo’s answer you will likely need to replace all instances of:
http://mirrors.digitalocean.com/ubuntu/with:
http://old-releases.ubuntu.com/ubuntuHello, @bhkdev121
Ubuntu 18.10 (aka cosmic) reached end of life on July 18, 2019.
After a release has been EOL for some time, Ubuntu moves the repositories to denote that they are no longer supported. We just sync their archive changes in our mirrors. So when they disappear there, they disappear in ours as well.
Recommended fix: Upgrade to Ubuntu 18.04
Alternate fix:
If you want to continue using an outdated release then edit
/etc/apt/sources.listand changearchive.ubuntu.comandsecurity.ubuntu.comtoold-releases.ubuntu.com.then update with:
Warning: As with almost any upgrade between major releases of an operating system, this process carries an inherent risk of failure, data loss, or broken software configuration. Comprehensive backups and extensive testing are strongly advised.
To avoid these problems, we recommend migrating to a fresh Ubuntu 20.04 server rather than upgrading in-place. You may still need to review differences in software configuration when upgrading, but the core system will likely have greater stability. You can follow our series on how to migrate to a new Linux server to learn how to migrate between servers.
Hope that helps!
Regards, Alex