Fix DPKG: Error: DPKG Frontend Lock is Locked By Another Process

In this article we are going to learn ‘Fix dpkg: error: dpkg frontend lock is locked by another process’. Whenever we are installing software, an error occurs with ‘dpkg: error: dpkg frontend lock is locked by another process’. dpkg is a free operating system software at the bottom of the package management system in Debian and its numerous derivatives. dpkg is used to install, remove, and supply information about .deb packages.

The dpkg (Debian package) itself is a low-level tool. APT (Advanced Package Tool), a high-level tool, is more commonly used than dpkg because it can bring packages to remote locations and deal with complex package relationships such as dependency fixes. Frontends like Aptitude (NCRS) and Synaptic (GTK +) are used for their friendly interface for APT.

The Debian package “dpkg” provides the dpkg program, as well as many other programs required for the run-time operation of the packaging system, including DPKG-DEB, DPKG-Split, DPKG-Query, DPKG-Statoveride, DPKG-Diverse, and DPKG. Trigger.

This includes programs like Update-Option and Start-Stop-Demon. The install-info was used to include the program as well but was later removed because it has now been developed and distributed separately. The Debian package “DPKG-Dev” contains the numerous build tools described below.

Follow the below steps to Fix DPKG: Error: DPKG Frontend Lock is Locked By Another Process

If you find the “dpkg: error: dpkg frontend lock is locked by another process” error while running the procedure described above, you need to do an extra step. First, find the ID of the process that contains the lock file. You can do so using below command.

itsmarttricks@ubuntu:~$ lsof /var/lib/dpkg/lock

Then make sure the process is not running.

itsmarttricks@ubuntu:~$ ps cax | grep PID
PID TTY STAT TIME COMMAND

The above command will give you the process PID using lock files. Use this PID to kill the process.

itsmarttricks@ubuntu:~$ kill PID
bash: kill: PID: arguments must be process or job IDs

itsmarttricks@ubuntu:~$ kill -9 PID
bash: kill: PID: arguments must be process or job IDs

Also Read – A Guide to Kill, Pkill and Killall Commands to Stop the Process in Linux(Kill Process Linux)

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