I cannot install any packages
6851
How do I install the ubuntu-restricted-extras package?
132822
"E: Package ‘synaptic’ has no installation candidate" when trying to install synaptic
30588
Unable to locate package
122921
Not able to install composer
43579
I cannot install new packages: "Could not get lock /var/lib/dpkg/lock"
30754
Cannot update: "No available releases found"
36696
Unmet dependencies unable to fix
154622
How do I resolve this installation error?
59119
apt-get, unmet dependencies, ... "but it is not going to be installed"
97771
"The package lists or status file could not be parsed or opened"
153810
"Untrusted packages could compromise your system's security" appears while trying to install anything
77062
Updates stopped and fix-broken install is broken
29326
Can't install a package due to "Something wicked happened resolving" error
61415
Mac stuck in "El Capitan" installer loop: "no packages were eligible for install"
106062
Can't Install or remove anything on Ubuntu 16.04 because py3clean and py3compile not found
7460
E: Unable to correct problems, you have held broken packages
29362
How do I install a single package from Debian testing or unstable on stable?