I am trying to solve errors to install MariaDB but i am getting new errors :/
Code:
Get:1 http://mirror.mephi.ru/mariadb/repo/5.5/ubuntu trusty InRelease [3,234 B]
Ign:2 http://archive.canonical.com/ubuntu precise InRelease
Get:3 http://archive.canonical.com/ubuntu precise Release [8,180 B]
Ign:4 http://extras.ubuntu.com/ubuntu precise InRelease
Err:1 http://mirror.mephi.ru/mariadb/repo/5.5/ubuntu trusty InRelease
The following signatures were invalid: 199369E5404BD5FC7D2FE43BCBCB082A1BB943DB
Get:5 http://archive.canonical.com/ubuntu precise Release.gpg [181 B]
Get:6 http://extras.ubuntu.com/ubuntu precise Release [11.9 kB]
Get:7 http://extras.ubuntu.com/ubuntu precise Release.gpg [72 B]
Ign:5 http://archive.canonical.com/ubuntu precise Release.gpg
Ign:9 http://us.archive.ubuntu.com precise InRelease
Ign:7 http://extras.ubuntu.com/ubuntu precise Release.gpg
Ign:10 http://us.archive.ubuntu.com precise-security InRelease
Get:8 http://ftp.osuosl.org/pub/mariadb/repo/5.5/ubuntu precise InRelease [2,489 B]
Hit:11 http://mariadb.mirror.liquidtelecom....po/10.4/ubuntu bionic InRelease
Err:8 http://ftp.osuosl.org/pub/mariadb/repo/5.5/ubuntu precise InRelease
The following signatures were invalid: 199369E5404BD5FC7D2FE43BCBCB082A1BB943DB
Ign:12 http://us.archive.ubuntu.com precise-updates InRelease
Hit:13 http://ftp.utexas.edu/mariadb/repo/10.3/ubuntu bionic InRelease
Ign:14 http://us.archive.ubuntu.com precise-backports InRelease
Err:15 http://us.archive.ubuntu.com precise Release
404 Not Found [IP: 91.189.91.38 80]
Err:16 http://us.archive.ubuntu.com precise-security Release
404 Not Found [IP: 91.189.91.38 80]
Err:17 http://us.archive.ubuntu.com precise-updates Release
404 Not Found [IP: 91.189.91.38 80]
Err:18 http://us.archive.ubuntu.com precise-backports Release
404 Not Found [IP: 91.189.91.38 80]
Reading package lists... Done
W: GPG error: http://mirror.mephi.ru/mariadb/repo/5.5/ubuntu trusty InRelease: The following signatures were invalid: 199369E5404BD5FC7D2FE43BCBCB082A1BB943DB
E: The repository 'http://mirror.mephi.ru/mariadb/repo/5.5/ubuntu trusty InRelease' is not signed.
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.
W: GPG error: http://archive.canonical.com/ubuntu precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
E: The repository 'http://archive.canonical.com/ubuntu precise Release' is not signed.
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.
W: GPG error: http://extras.ubuntu.com/ubuntu precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192
E: The repository 'http://extras.ubuntu.com/ubuntu precise Release' is not signed.
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.
W: GPG error: http://ftp.osuosl.org/pub/mariadb/repo/5.5/ubuntu precise InRelease: The following signatures were invalid: 199369E5404BD5FC7D2FE43BCBCB082A1BB943DB
E: The repository 'http://ftp.osuosl.org/pub/mariadb/repo/5.5/ubuntu precise InRelease' is not signed.
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://us.archive.ubuntu.com precise Release' does not have 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://us.archive.ubuntu.com precise-security Release' does not have 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://us.archive.ubuntu.com precise-updates Release' does not have 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://us.archive.ubuntu.com precise-backports Release' does not have 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.