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How Can I get the Process information of the process which is holding apt-get lock?

Vraj Pandya
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1 Answers1

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Usually it's a dpkg process, so sudo lsof | grep 'dpkg/lock'

The output will be something like this:

apt-get   23126                   root    4uW     REG               8,18            0    3277485 /var/lib/dpkg/lock

And in my case, the apt-get process is holding the lock. pid 23126.

If nothing comes back as holding it open, then someone may have interrupted a package download or install and it wasn't able to clean up the lock.

If you want info on that process you could ps -f -p 23126

Or, putting it all together, ps -f -p $(sudo lsof | grep 'dpkg/lock' | awk '{print $1}')

Or use pstree and show the parents:

pstree -s $(sudo lsof | grep 'dpkg/lock' | awk '{print $1}')
Stephen
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  • Will it always be dpkg process? Even if installation is done using software centre? – Vraj Pandya Dec 16 '16 at 01:57
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    Pretty sure the software center uses dpkg in the background. You could use pstree to see the parents/children of the process in qustion. Updated answer. And it will always be that lock, if that's what you mean... – Stephen Dec 16 '16 at 01:58