I can't install any app from Ubuntu software in 18.04
991
How can I fix apt error "W: Target Packages ... is configured multiple times"?
115687
How do I properly install a system app given its .apk?
44638
I can't install or update Apps from Play Store: Error 905. How to fix?
62476
E: Package '' has no installation candidate
28875
Installing applications from source
49782
Installation type empty on 16.04 for a dual boot
19218
How do I install an application from a .dmg disk image?
30645
How to install (old) packages for Ubuntu 9.04?
117302
"Package 'docker-ce' has no installation candidate" in 18.04
149984
Can't update or install anything. Ubuntu 3.11.0.14
5192
How to get my software into Ubuntu?
103929
sudo apt upgrade error 18.04 (Broken Packages)
80480
Snaps won't install in Ubuntu 18.04
40893
android 5.1.1 wont install apps
1520
How to install software or upgrade from an old unsupported release?
73357
Every package "has no installation candidate"
33268
Installing VMware on 18.04: Failed to build vmmon