What is `sudo apt-get clean`?
92759
What is difference between the options "autoclean", "autoremove" and "clean"?
113233
Is removing old linux-headers and linux-image packages safe?
50991
What is the Difference Between `apt-get purge` and `apt-get remove`?
23273
How to delete broken packages in ubuntu
54998
What does "apt-get install !!" do and how to make it work?
45292
How to install removed apt
17208
What does this apt error message ("Download is performed unsandboxed as root...") mean?
46618
How can I know what programs some apt-get package contains?
45541
How to fix sudo after "chmod -R 777 /usr/bin"?
103355
What the -f in the "apt-get -f install" command do?
153793
Can't delete and remove SELinux context or ACL from a symlink in /usr/lib under root
99527
What's the good way to clean up the system (and is Bleachbit safe) on Ubuntu 14.04?
25278
apt-get install with '-' (minus / hyphen) removes packages
95593
sudo apt-get update returns an error
44313
How to run "sudo apt-get update" through proxy in commandline?
62881
After upgrading from Ubuntu 14.04 LTS to 16.04 LTS, last process left cleaning, how to perform?
69275
I installed a program by getting its source code, and then running `sudo make install`; how to make `apt-get` know about it?