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Is there a place where I can look what updates I've installed?

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In 10.10, Ubuntu Software Center has a list of all the updates you have downloaded in the past.

enter image description here

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+1 This answer works on more recent versions too. – James Bradbury Jul 26 '14 at 19:05

You can read the history.log file in /var/log/apt.

Eg. less /var/log/apt/history.log.

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up vote 21 down vote accepted

On 10.04 Click (System > Administration > Synaptic Package Manager > File > History)

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+1 self-answers are good for askubuntu – msw Nov 21 '10 at 19:18
Found the answer in another forum. – vrcmr Nov 21 '10 at 19:25
All I get is a list of packages that I installed via Synaptic, it doesn't show all the packages I updated via Update Manager. – Alvin Row Nov 21 '10 at 19:39
I think there's even a badge for self answers....there is on (another stack based forum)'s self-learner over there – RobotHumans Nov 22 '10 at 3:17
Yup it exists here too – RobotHumans Nov 22 '10 at 3:18

/var/log/apt contains a history of package installations. However, by default, it is managed by logrotate which compresses and ages out old entries.

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So is this the best place for me to check history on Ubuntu Server? – Brettski Apr 6 '11 at 17:26

It's now possible to do this through the software center as well! Go to History and you can display all of your updates and installations.

Software Center History

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I suppose it is 10.10 ? – vrcmr Nov 21 '10 at 19:36
Sure is. I don't think this was available in previous distributions... – Nick Pascucci Nov 21 '10 at 19:53

As an alternative to lgarzo's answer, you can grep what you are interested in from /var/log/dpkg.log. E.g., if you want to see everything you installed or upgraded yesterday, you could run:

cat /var/log/dpkg.log | grep "^2012-03-25.*\ installed\ "

One thing to note: this will also list manually installed packages (sudo dpkg -i ...), which won't show up in apt's history.

Even better use zgrep if it's installed so you can find lines in gzipped files as well

zgrep "^2012-03-25.*\ installed\ " /var/log/dpkg.log*
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