I have the same problem. How do I fix it? I tried this:
sudo apt-get clean
sudo apt-get update
sudo apt-get upgrade
Still doesn't work. Here's what my terminal said:
stanleydellxps8500@stanleydellxps8500-XPS-8500:~$ sudo apt-get clean
[sudo] password for stanleydellxps8500:
stanleydellxps8500@stanleydellxps8500-XPS-8500:~$ sudo apt-get update
Hit:1 http://dl.google.com/linux/chrome/deb stable InRelease
Get:2 http://ca.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Get:4 http://ca.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Ign:5 http://ppa.launchpad.net/kazam-team/stable-series/ubuntu bionic InRelease
Hit:6 https://repo.steampowered.com/steam stable InRelease
Hit:7 http://archive.ubuntu.com/ubuntu bionic InRelease
Hit:8 https://packages.zorinos.com/stable bionic InRelease
Hit:9 https://packages.zorinos.com/patches bionic InRelease
Get:10 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main amd64 DEP-11 Metadata [293 kB]
Ign:11 http://ppa.launchpad.net/mhsabbagh/greenproject/ubuntu bionic InRelease
Hit:12 https://packages.zorinos.com/apps bionic InRelease
Get:13 http://ca.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 DEP-11 Metadata [295 kB]
Get:14 http://security.ubuntu.com/ubuntu bionic-security/main amd64 DEP-11 Metadata [51.4 kB]
Hit:15 https://packages.zorinos.com/drivers bionic InRelease
Get:16 http://ca.archive.ubuntu.com/ubuntu bionic-updates/multiverse amd64 DEP-11 Metadata [2,468 B]
Get:17 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 DEP-11 Metadata [57.9 kB]
Get:18 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 DEP-11 Metadata [2,464 B]
Get:19 http://ca.archive.ubuntu.com/ubuntu bionic-backports/universe amd64 DEP-11 Metadata [9,268 B]
Hit:20 http://ppa.launchpad.net/sylvain-pineau/kazam/ubuntu bionic InRelease
Err:21 http://ppa.launchpad.net/zorinos/apps/ubuntu bionic InRelease
Cannot initiate the connection to ppa.launchpad.net:80 (2001:67c:1560:8008::19). - connect (101: Network is unreachable) Could not connect to ppa.launchpad.net:80 (91.189.95.85), connection timed out [IP: 91.189.95.85 80]
Err:22 http://ppa.launchpad.net/zorinos/drivers/ubuntu bionic InRelease
Cannot initiate the connection to ppa.launchpad.net:80 (2001:67c:1560:8008::19). - connect (101: Network is unreachable) [IP: 91.189.95.85 80]
Err:23 http://ppa.launchpad.net/zorinos/patches/ubuntu bionic InRelease
Cannot initiate the connection to ppa.launchpad.net:80 (2001:67c:1560:8008::19). - connect (101: Network is unreachable) [IP: 91.189.95.85 80]
Err:24 http://ppa.launchpad.net/zorinos/stable/ubuntu bionic InRelease
Cannot initiate the connection to ppa.launchpad.net:80 (2001:67c:1560:8008::19). - connect (101: Network is unreachable) [IP: 91.189.95.85 80]
Err:25 http://ppa.launchpad.net/kazam-team/stable-series/ubuntu bionic Release
Cannot initiate the connection to ppa.launchpad.net:80 (2001:67c:1560:8008::19). - connect (101: Network is unreachable) [IP: 91.189.95.85 80]
Err:26 http://ppa.launchpad.net/mhsabbagh/greenproject/ubuntu bionic Release
Cannot initiate the connection to ppa.launchpad.net:80 (2001:67c:1560:8008::19). - connect (101: Network is unreachable) [IP: 91.189.95.85 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/kazam-team/stable-series/ubuntu bionic 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://ppa.launchpad.net/mhsabbagh/greenproject/ubuntu bionic 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.
stanleydellxps8500@stanleydellxps8500-XPS-8500:~$ sudo apt-get upgrade
[sudo] password for stanleydellxps8500:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
stanleydellxps8500@stanleydellxps8500-XPS-8500:~$
But Software Updater still says: Failed to download repository information. Check your internet connection.
My internet is working, and the updater is set to the Main server.