i have ubuntu 19.04
when i try sudo apt-get update
i get this
Ign:1 http://tn.archive.ubuntu.com/ubuntu disco InRelease
Hit:2 http://ppa.launchpad.net/openjdk-r/ppa/ubuntu disco InRelease
Ign:3 http://security.ubuntu.com/ubuntu disco-security InRelease
Ign:4 http://tn.archive.ubuntu.com/ubuntu disco-updates InRelease
Err:5 http://security.ubuntu.com/ubuntu disco-security Release
404 Not Found [IP: 91.189.88.152 80]
Hit:6 https://dl.yarnpkg.com/debian stable InRelease
Ign:7 http://tn.archive.ubuntu.com/ubuntu disco-backports InRelease
Err:8 http://tn.archive.ubuntu.com/ubuntu disco Release
404 Not Found [IP: 91.189.88.152 80]
Hit:9 https://artifacts.elastic.co/packages/7.x/apt stable InRelease
Err:10 http://tn.archive.ubuntu.com/ubuntu disco-updates Release
404 Not Found [IP: 91.189.88.152 80]
Hit:11 https://dl.winehq.org/wine-builds/ubuntu bionic InRelease
Hit:12 https://deb.nodesource.com/node_12.x disco InRelease
Err:13 http://tn.archive.ubuntu.com/ubuntu disco-backports Release
404 Not Found [IP: 91.189.88.152 80]
Hit:14 https://repos.influxdata.com/ubuntu disco InRelease
Reading package lists... Done
E: The repository 'http://security.ubuntu.com/ubuntu disco-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.
E: The repository 'http://tn.archive.ubuntu.com/ubuntu disco 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://tn.archive.ubuntu.com/ubuntu disco-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://tn.archive.ubuntu.com/ubuntu disco-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.
how can i fix this problem please help. thank you.
