To further check and verify the error, I tried to check all the processes running for apt command. While the above error could occur due to many reasons but in my case it was due to start of the unattended upgrade in my Ubuntu 20.04 LTS system. It is held by process 3279 (unattended-upgr). ^Citing for cache lock: Could not get lock /var/lib/dpkg/lock-frontend.
Solved "Could not get lock /var/lib/dpkg/lock-frontend (unattended-upgr)"Īlso Read: Solved "Error while dialing dial unix /var/run/dockershim.sock"Īs I was explaining when I tried to remove tree utility from my system by using sudo apt remove tree command then I noticed below error on the output. Hence before solving this error, I decided to write an article about this so that it will help you folks as well. I am sure many of you sooner or later will encounter this error as well. In my case, this error occurred when I was trying to remove tree utility from my Ubuntu 20.04 LTS System using sudo apt remove tree command. This error can be sometimes very annoying especially when you have to perform certain urgent task. This error usually occurs when you just started your system to perform certain task which requires you to run apt command. It is not very uncommon that one fine day you tried to run some command and all you got is "Could not get lock /var/lib/dpkg/lock-frontend (unattended-upgr)" error on the output.
#Sudo apt upgrade unable to acquire dpkg lock how to
In this article, we will see how to solve "Could not get lock /var/lib/dpkg/lock-frontend (unattended-upgr)" error on a Ubuntu/Debian based Linux systems.
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