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How to list previously installed packages from the apt history.

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This is how to get information about recently installed packages on Ubuntu. This is looking at the lowlatency package I just installed.

4.4 Thu Jun 04 jason@Yog-Sothoth 0: $ grep "lowlatency" /var/log/apt/history.log | sed "s/ /\n/gi";
Commandline:
apt
install
linux-image-5.3.0-24-lowlatency
Install:
linux-image-5.3.0-24-lowlatency:amd64
(5.3.0-24.26~18.04.2),
linux-modules-5.3.0-24-lowlatency:amd64
(5.3.0-24.26~18.04.2,
automatic)
Commandline:
apt-get
install
--reinstall
linux-image-5.3.0-24-lowlatency
Reinstall:
linux-image-5.3.0-24-lowlatency:amd64
(5.3.0-24.26~18.04.2)
Commandline:
apt-get
install
linux-headers-5.3.0-24-lowlatency
Install:
linux-headers-5.3.0-24-lowlatency:amd64
(5.3.0-24.26~18.04.2),
linux-headers-5.3.0-24:amd64
(5.3.0-24.26~18.04.2,
automatic)

This is how to count all manually installed packages on Debian or Ubuntu.

jason@Yog-Sothoth:~$ apt-mark showmanual | wc -l
2302

List just a few manually installed packages using wildcards.

4.4 Thu Jun 04 jason@Yog-Sothoth 0: $ apt-mark showmanual | grep "ubuntu-wallpapers-*"
ubuntu-wallpapers
ubuntu-wallpapers-artful
ubuntu-wallpapers-bionic
ubuntu-wallpapers-karmic
ubuntu-wallpapers-lucid
ubuntu-wallpapers-maverick
ubuntu-wallpapers-natty
ubuntu-wallpapers-oneiric
ubuntu-wallpapers-precise
ubuntu-wallpapers-quantal
ubuntu-wallpapers-raring
ubuntu-wallpapers-saucy
ubuntu-wallpapers-trusty
ubuntu-wallpapers-utopic
ubuntu-wallpapers-vivid
ubuntu-wallpapers-wily
ubuntu-wallpapers-xenial
ubuntu-wallpapers-yakkety
ubuntu-wallpapers-zesty

List only a few recently installed packages this way.

jason@jason-Lenovo-H50-55:~$ sed "s/ /\n/gi" /var/log/apt/history.log | tail -n 30
jason
(1000)
Install:
gcc-10-base:i386
(10-20200411-0ubuntu1,
automatic),
steamcmd:i386
(0~20180105-3),
libc6:i386
(2.31-0ubuntu9,
automatic),
libcrypt1:i386
(1:4.4.10-10ubuntu4,
automatic),
libgcc-s1:i386
(10-20200411-0ubuntu1,
automatic),
libunistring2:i386
(0.9.10-2,
automatic),
libstdc++6:i386
(10-20200411-0ubuntu1,
automatic),
libidn2-0:i386
(2.2.0-2,
automatic)
End-Date:
2020-08-31
 
17:11:39

This also tells us that the packages were installed and that they were automatically pulled in by the installation of another package.


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