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I am new to Ubuntu. I have installed Ubuntu MATE in my p.c. Now when I opened browser Mozilla Firefox it searched for a update. So I have been updating it but it fails every time.

sudo apt update works well.

sudo apt upgrade throws this error:

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?

How can I update all the applications in Ubuntu MATE as well as Mozilla Firefox?

Zanna
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Encipher
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  • I am using ubuntu mate.I don't think ubuntu mate and ubuntu work in same way. Ubutu mate is a lighter version compare to Ubuntu. So definitely there are some software issues. – Encipher Dec 13 '18 at 17:57
  • sudo lsof /var/lib/dpkg/lock After given that command I got lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs Output information may be incomplete. COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME unattende 4937 root 4uW REG 8,1 0 2098137 /var/lib/dpkg/lock What does it mean? – Encipher Dec 13 '18 at 18:02
  • Because Mate is lighter version. – Encipher Dec 13 '18 at 18:08
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    There is no difference between Ubuntu MATE and Ubuntu that is relevant to anything in your question. It seems the underlying issue here is with Firefox. APT will update firefox along with all other packages Reboot and run sudo apt update && sudo apt full-upgrade && sudo apt autoremove and then please let us know if you still have any problems with Firefox. – Zanna Dec 13 '18 at 18:25

1 Answers1

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Use this with care, i.e. make sure not other installation/upgrade is running in parallel.

You can try sudo rm /var/lib/dpkg/lock.

It should remove the lock and allow for upgrade.

Edit:

To check whether any other installation is running, try

ps -ef | grep apt

ps -ef | grep dpkg

and see if any processes are listed, if same are present, check if any other open terminal is running any installation.

Hope it helps.

IamSushil
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