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While upgrading ubuntu from 18.04 to 20.04 . Upgradation shows an error

Asked by Alivelu J

when given command : sudo apt upgrade
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

plz help me out.

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Manfred Hampl (m-hampl) said : 		#1

It is not possible to run two package management programs at the same time, and apparently there is already a process running (eventually in the background) which prevents that you start another one.

If you cannot find that process to end it manually, then you can reboot and try again - and it should work then.

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Yeonguk Choo (choo121600) said : 		#2

After the upgrade from 18.04 to 20.04 is complete, run the following `sudo apt upgrade` command :)

Because during the upgrade 18.04 -> 20.04, the following commands cannot proceed together.

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