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Pop up states:

Cannot obtain lock E: Could not get lock/var/lib/dpkg/lock-frontend.
It is held by process 2197 (unattended-upgr) 
W: Be aware that removing the lock file is not a solution and may break your system. 
E: Unable to aquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?"

What should I do? I do not know if another process is using it!

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  • You should wait and try again later. Mar 6, 2022 at 20:26

2 Answers 2

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That error is telling you that unattended-upgrades is currently working on updates.

You need to wait for it to finish.

When it's done you can continue with your manual updates.

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I did wait; then updated every fetched update except the ones' that had the prefix "lib"; then I updated the "lib"; everyone did successfully install.

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