Can't add applications using sudo apt-get and unofficial ppa: unable to lock directory
728
Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?
23286
dpkg: error: dpkg status database is locked by another process
5565
How to fix Permission Denied (Public key) error?
11231
How do I create a PPA for a working program?
96145
Cannot Add PPA Behind Proxy Ubuntu 14.04
80258
Unable to open any graphical app with "sudo"
43579
I cannot install new packages: "Could not get lock /var/lib/dpkg/lock"
135985
Apt-get saying "Unable to correct problems, you have held broken packages."
145373
Installing dpkg error "requested operation requires superuser privilege"
1856
How do I add the kernel PPA?
59119
apt-get, unmet dependencies, ... "but it is not going to be installed"
22164
Problem with sudo apt get update: The repository cdrom... does not have a Release file
21617
Why can't I press the Install button when installing applications from unknown sources?
91611
Unable to use package manager due to "exclusive lock" error
95593
sudo apt-get update returns an error
54998
What does "apt-get install !!" do and how to make it work?
11909
404 error with apt-get update, Don't have any PPA's