dpkg -l Package States

This is specifically in reference to the flags at the start of each line when you perform dpkg -l.

dpkg -l Example Info

In the above image, far left, you can see the column that has ii or rc. That would be the specific info I’m referencing, and knowing this info doesn’t hurt!

Definitions

1st Letter 2nd Letter Opt. 3rd Letter
u - unknown n - not-installed r - reinst-required
i - install i - installed  
r - remove c - config-files  
p - purge u - unpacked  
h - hold f - half-configured  
. h - half-installed  
. w - triggers-awaited  
. t - triggers-pending