Unable to install any programs
47784
What is "superuser" and how do I get that privilege?
144754
Wine won't install, Does not have valid release file
131338
How do I deal with unknown installation error code -505?
135985
Apt-get saying "Unable to correct problems, you have held broken packages."
43579
I cannot install new packages: "Could not get lock /var/lib/dpkg/lock"
1632
How do I fix a "Failed to download package files" error?
110356
Installing Ubuntu (graphic errors)
122921
Not able to install composer
1564
Error -504 on appliation installation
97771
"The package lists or status file could not be parsed or opened"
15698
Why is Wine not installable on my system?
71368
Ubuntu 12.04 won't install
107535
Unable to install software or update the system after half installed java
98511
16.04 Cannot install anything from Ubuntu Software center
121099
System program problem detected?
78518
Windows 7, update.packages problem: "unable to move temporary installation"?
19749
How to debug an unmet dependencies problem?