Ubuntu E: unable to acquire lock / var/lib/dpkg/lock-frontend-open (11: resource temporarily unavailable)

Ubuntu 18.04, the same with other versions of Ubuntu

Question:

When running sudo apt-get install/update/ or other commands, the following prompts sometimes appear for various ambiguous reasons:

E: unable to acquire lock / var/lib/dpkg/lock-frontend-open (11: resource temporarily unavailable)

E: Unable to acquire the dpkg frontend lock (/ var/lib/dpkg/lock-frontend), is another process using it?

The reason for this problem may be:

Under the Ubuntu system terminal, when installing software with apt-get install, if the terminal is forcibly closed without completing the download. The apt-get process may not end at this point. As a result, if you run the apt-get install command again to install the software, an error like this occurs. That is, another program is occupying the apt-get install process, because when it is running, it will occupy the system lock when the software source is updated (referred to as the "system update lock"), and the resource is locked.

So, in the first way, we just need to kill the previous process and release the system lock:

Ps-e | grep apt-get

Display

5873? 00:00:01 apt-get

And then execute

Sudo kill 5873

The second method is to force unlocking.

Password for linuxidc@linuxidc:~$ sudo rm / var/cache/apt/archives/lock [sudo] linuxidc: linuxidc@linuxidc:~$ sudo rm / var/lib/dpkg/lock

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