Working with packages in Debian/Ubuntu

Often distr. has GUI app calld Synaptic.It too simple :D
To install .deb file- GDebi.

Console:

To install:
sudo apt-get install progr

To remove:
sudo apt-get remove prog

Autoremove(unused stuff):
sudo apt-get autoremove

To clean(because apt fetches packages and dont delete it :P ):
sudo apt-get clean

Update packages lists:
sudo apt-get update

Easter egg:
apt-get moo

Low level:
It works locally and doesnt fetch anything...

Remove:
dpkg -r progr

Install:
dpkg -i progr.deb

Reconfigure package(useful!):
dpkg-reconfigure progr

Also there is nice textmode utility called sudo aptitude .I like it :P
Search by / key.Select by +.And instal by g .Exit q (logical).