I can not use this command sudo apt-get install w64codecs.
The terminal shows this:
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?
What's likely happening is that the software updater is running and checking for updates. Only one program at a time can access the packages cache.
Usually if you wait long enough for the updater to finish, it will work again.
Another process is currently using dpkg. This happens if any command using apt-get is currently running, or some other program that locks this file (such as aptitude, synaptic, gdebi, or dpkg).
It also can happen if you start an installation but then force it to stop. Waiting for the current installation to finish or restarting your computer can solve this issue.