Hello! Today i decided to install ElementaryOS and installation was fine but after installation i get weird popups (failed to fetch) and in console i get messages like this : Code (Text): W: The repository 'http://security.debian.org/debian-security loki 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://ftp.pl.debian.org/debian loki 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://ftp.de.debian.org/debian loki 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://ftp.pl.debian.org/debian loki-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://packages.elementary.io/appcenter loki 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://http.debian.net/debian loki 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://ppa.launchpad.net/elementary-os/stable/ubuntu loki 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://ppa.launchpad.net/elementary-os/os-patches/ubuntu loki 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.debian.org/debian-security/dists/loki/main/source/Sources 404 Not Found [IP: 151.101.112.204 80] E: Failed to fetch http://ftp.pl.debian.org/debian/dists/loki/main/source/Sources 404 Not Found [IP: 153.19.251.221 80] E: Failed to fetch http://ftp.de.debian.org/debian/dists/loki/main/source/Sources 404 Not Found E: Failed to fetch http://ftp.pl.debian.org/debian/dists/loki-updates/main/source/Sources 404 Not Found [IP: 153.19.251.221 80] E: Failed to fetch http://packages.elementary.io/appcenter/dists/loki/main/binary-amd64/Packages 404 Not Found [IP: 104.28.5.44 80] E: Failed to fetch http://cdn-fastly.deb.debian.org/debian/dists/loki/main/binary-amd64/Packages 404 Not Found [IP: 151.101.112.204 80] E: Failed to fetch http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/loki/main/source/Sources 404 Not Found E: Failed to fetch http://ppa.launchpad.net/elementary-os/os-patches/ubuntu/dists/loki/main/source/Sources 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead. How i can fix this ?
Seems like you are not connecting to the repository on the current server you have selected. Try changing servers and then run the below should fix it. Code (Text): sudo apt-get autoclean sudo apt-get clean sudo apt-get update