Ubuntu 14.04 and above
apt tool on Ubuntu 14.04 and above makes this very easy.
apt list --installed
To get a list of packages installed locally do this in your terminal:
dpkg --get-selections | grep -v deinstall
-v tag “inverts” grep to return non-matching lines)
To get a list of a specific package installed:
dpkg --get-selections | grep postgres
To save that list to a text file called
packages on your desktop do this in your terminal:
dpkg --get-selections | grep -v deinstall > ~/Desktop/packages
Alternatively, simply use
(you don’t need to run any of these commands as the superuser, so no
sudo or any other variants necessary here)
To get just the packages which were expressly installed (not just installed as dependencies), you can run
aptitude search '~i!~M'
This will also include a brief description, which you may want. If not, also add the option
-F '%p', as mentioned by karthick87.
Yet another option seems to be to copy the file
/var/lib/apt/extended_states, which is a text file database in this format:
Package: grub-common Architecture: amd64 Auto-Installed: 0 Package: linux-headers-2.6.35-22-generic Architecture: amd64 Auto-Installed: 1
Auto-Installed: 0 indicates that the package was expressly installed and is not just a dependency.
To list all packages intentionally installed (not as dependencies) by apt commands, run the following :
(zcat $(ls -tr /var/log/apt/history.log*.gz); cat /var/log/apt/history.log) 2>/dev/null | egrep '^(Start-Date:|Commandline:)' | grep -v aptdaemon | egrep '^Commandline:'
This provides a reverse time based view, with older commands listed first:
Commandline: apt-get install k3b Commandline: apt-get install jhead ...
Installation data also showing synaptic usage, but without details
(the same with installation date) :
(zcat $(ls -tr /var/log/apt/history.log*.gz); cat /var/log/apt/history.log) 2>/dev/null | egrep '^(Start-Date:|Commandline:)' | grep -v aptdaemon | egrep -B1 '^Commandline:'
providing the following:
Start-Date: 2012-09-23 14:02:14 Commandline: apt-get install gparted Start-Date: 2012-09-23 15:02:51 Commandline: apt-get install sysstat ...