After upgrading from Ubuntu 12.04 to 14.04 not able to install any new package
74227
dpkg error when using apt-get install
84537
Using dpkg to install upgrade and dist-upgrade packages
17645
Unable to upgrade pip
151605
upgrading from 15.10 to 16.04 apt not installed
404
Last upgrade crashes network manager (no internet connection, no applet)
78859
How to reinstall default packages
85724
Cannot update/get any packages. gedit not installed
73357
Every package "has no installation candidate"
108176
Ubuntu 16.04 broken kernel packages won't let me install or remove anything with apt-get
12578
How do I upgrade to a newer version of Ubuntu?
2432
Unable to correct problems, you have held broken packages
130579
how to upgrade a single package in debian
45921
VLC will not install 14.04
43579
I cannot install new packages: "Could not get lock /var/lib/dpkg/lock"
18635
Why is my Apache not working after upgrading to Ubuntu 14.04?
20398
dpkg broken after 15.04 upgrade fail
127766
how to upgrade my Debian package with minor changes