Question

3

how to trim dpkg upgraded packages list

rated 0 times [ 3] [ 0] / answers: 1 / hits: 679 / 3 Years ago, fri, may 21, 2021, 6:27:05

Latest upgrade borked my system and I`m trying to revert the last upgrade. I opened my comp with live USB and chrooted to partition that is OS installed. I get the upgraded packages with

cat /var/log/dpkg.log | grep upgrade >>upgradeddpkg

It lists pakages like

2014-03-14 15:31:45 upgrade libprocps0:i386 1:3.3.3-2ubuntu5.3 1:3.3.3-3

2014-03-14 15:31:52 upgrade libreadline-dev:i386 6.2-9ubuntu1 6.2+dfsg-0.1

2014-03-14 15:31:53 upgrade libreadline6-dev:i386 6.2-9ubuntu1 6.2+dfsg-0.1

2014-03-14 15:31:55 upgrade readline-common:all 6.2-9ubuntu1 6.2+dfsg-0.1

2014-03-14 15:32:25 upgrade libreadline6:i386 6.2-9ubuntu1 6.2+dfsg-0.1

2014-03-14 15:32:33 upgrade libudev0:i386 175-0ubuntu19 175-7.2

2014-03-14 15:32:40 upgrade libdevmapper-dev:i386 2:1.02.74-6ubuntu4 2:1.02.74-8

2014-03-14 15:32:42 upgrade libdevmapper-event1.02.1:i386 2:1.02.74-6ubuntu4 2:1.02.74-8

2014-03-14 15:32:43 upgrade libdevmapper1.02.1:i386 2:1.02.74-6ubuntu4 2:1.02.74-8

2014-03-14 15:32:44 upgrade dmsetup:i386 2:1.02.74-6ubuntu4 2:1.02.74-8

How can I get only the name of the packages by means of grep, awk or whatever tool?

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fulild

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answered 3 Years ago hreadsoplet · Accepted Answer

Try the below command,

awk ' { print $4 } ' upgradeddpkg > upgrade.txt

If you don't want the colon : then run,

awk -F ':' ' { print $1 } ' upgrade.txt > upgrade1.txt

Explanation:

awk ' { print $4 } ' upgradeddpkg > upgrade.txt

In this, awk takes the input from upgradeddpkg and prints only the $4(column number 4).That output was redirected to upgrade.txt file.So upgrade.txt file contains only the package names with colon.To remove the colon and its upcoming part(following), you have to run the second command.By default awk considers space as a delimiter.

awk -F ':' ' { print $1 } ' upgrade.txt > upgrade1.txt

Delimiter colon was manually set and awk considers colon as a delimiter instead of space.Now awk takes the input(stdin) from the upgrade.txt and prints(stdout) the coloumn1(part before the colon).Finally the standard output was redirected to upgrade1.txt.Now it contains only the package names.