![]() Run the following command to look and print the process holding dpkg lock and prompt to terminate it gracefully. It may be a cron job or systemd timers calling the dpkg database. So to fix the /var/lib/dpkg/lock-frontend issue, you need to find the process and quit or close it gracefully. ![]() Sometimes waiting for another process to release dpkg doesn't work if the process is not completed due to some dependencies. ![]() ![]() $ ps aux | grep -i apt Method3 - Find the frontend process and quit it gracefully to release dpkg lock You can run the following command to get the PID to know, which process has locked the dpkg database. In case you don't get this message due to any reason. When I checked in details, automatic software updates were running using the software centre in Ubuntu. In my case, the process with PID 13172 (aptd) was holding dpkg lock and resulting in /var/lib/dpkg/lock-frontend error while installing another package. Nowadays, apt is pretty smart, it automatically shows you the PID and process name, which is having a lock as shown in the image. To fix this issue, the best solution is to wait and let the other process complete and the dpkg database will get released. It happens due to the dpkg database lock. Whenever you get a "Could not open lock file /var/lib/dpkg/lock-frontend" error while installing any package in Ubuntu. $ sudo apt update Method2- Let the other process complete, which is holding dpkg database lock checkout this article, in case you get "sudo command not found" error. To fix this issues, always make sure you have sudo or root access to run "apt" command.It means you don't have permission to run the "apt" command. If you are trying to install any application or running updates in Ubuntu and getting " E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied)" error. Let's deep dive and see all the solutions and similar errors you may face - Method1 - Appropriate sudo or root rights to fix "Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied)" error Removing the lock file may be a solution but not recommended.Kill hang or frozen process, if soft quit is not working.Check out cron jobs or systemd timers calling dpkg database or frontend, disable them.Find the frontend and quit it gracefully.Let the other process complete, which is holding dpkg database lock.Make sure you have sudo or root rights to run updates.Software center (GUI) is open How to fix Why I get "Could not open lock file /var/lib/dpkg/lock-frontend" error ?įollowing methods can fix this /var/lib/dpkg/lock-frontend issue.May be your file system is corrupted, Read only or using noexec in fstab file.Any other process is holding dpkg database lock.You don't have sudo rights and trying to run sudo update command.So that you can avoid any dpkg database or filesystem corruption problem.īefore deep dive let's find out the reason for this dpkg lock issue - Why I get "Could not open lock file /var/lib/dpkg/lock-frontend" issue ? I will tell you the right procedure to fix it. If you use Linux then the " could not open lock file /var/lib/dpkg/lock-frontend" error is very common and this post will help you to solve this issue.
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