What does "ii" mean in "dpkg --list" command output? [duplicate]

What is the significance/meaning of ii at the beginning of the output of

dpkg --list 

command?

dpkg --list | grep firefox

for example, returns ii firefox together with other information.

1 Answer

The first i is the desired action, i stands for install.

The second i is the current package status, i stands for installed.

From man dpkg-query:

The first three columns of the output show the desired action, the package status, and errors, in that order.

Desired action:

 u = Unknown i = Install h = Hold r = Remove p = Purge

Package status:

 n = Not-installed c = Config-files H = Half-installed U = Unpacked F = Half-configured W = Triggers-awaiting t = Triggers-pending i = Installed

Error flags:

 <empty> = (none) R = Reinst-required