This error can occur due to several reasons. 1 – Identify and kill all apt or apt-get related processes In this article we will shall provide some effective methods to get rid of this kind of errors. Other users might encounter similar ones like : Let us know how it went.Sometimes when users try to install an application by executing the usual apt command on Ubuntu, they get the following error:Įrror: Could not get lock /var/lib/dpkg/lock-frontend I’m sure that if you have come this far, you should have resolved the error by now. $ sudo rm /var/cache/apt/archives/lock $ sudo rm /var/lib/dpkg/lockĪnd that’s how you resolve the ‘ Could not get lock /var/lib/dpkg/lock‘ and could not get lock /var/lib/apt/lists/lock errors. If you happen to get an error about the apt-cache lock such as /var/cache/apt/archives/lock, proceed and remove the lock file as shown. Removing the lock-frontend file might again lead to the ‘ Could not get lock /var/lib/dpkg/lock’ error, so once again, you will have to remove the lock file. If nothing gives, simply remove the /var/lib/dpkg/lock-frontend file as shown. The immediate remedy is to exit or close the application and give it another try. This could either be Gdebi or synaptic package manager or any other application. The lock-frontend error implies that a graphical application that used apt / dpkg is currently running. Other times, you might get a /var/lib/dpkg/lock-frontend error. If the error you are getting is the ‘Could not get lock /var/lib/dpkg/lock.’ error, delete the lock file as shown: $ sudo rm /var/lib/dpkg/lock Simply run the command below: $ sudo rm /var/lib/apt/lists/lock The solution to this problem is to get rid of the apt lock file(s). However, if the latest apt command was not successfully executed (i.e terminated abruptly), the lock file persists and blocks any subsequent apt or apt-get instances. ![]() When you run any apt or apt-get command, a lock file is usually created. The lock file blocks two or multiple processes from accessing the same data. In some situations, the root cause could be the lock file. If they have all cleared, you can proceed to update the system without a problem. Once done, verify again if the processes have ended using the ps command. Execute the kill -9 command followed by the process ID as follows. You can do so by sending a SIGKILL command to shut down the process immediately. To clear the error, you need to kill the processes that are associated with the apt command. To do so, use the ps command as shown: $ ps aux | grep - i apt ![]() The first step in diagnosing this problem is listing the processes that are using the apt package manager. Solution 1) Killing all processes which are using the APT manager A couple of options are available to fix this issue. ![]() There’s absolutely no need to panic in case you run into this error. A second attempt to use apt or apt-get command will yield the error. It can also occur when you prematurely cancel an update/upgrade that is in progress, accidentally or otherwise. Such happens when you have 2 or more terminals running a system update or upgrade. As the error suggests, this error usually happens when another process is currently using the /var/lib/dpkg/lock or /var/lib/dpkg/lock file.
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