Sometimes when we use the Terminal following error appears and commands not work:
Error- E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
How to fix it:
Option 1: restart your system. ---It is too longway
Option 2: open the terminal and copy-paste following and hit enter
sudo rm /var/lib/apt/lists/lock
That's it now it is fixed the error and you can use the terminal.