Apt-get Error

Executing apt-get update generates an error

"Error Phenomenon"

e:could not get Lock/var/lib/apt/lists/lock-open (Resource temporarily unavailable)the previous operation uses CTRL + C to force the exit Apt-get instruction, while the actual apt-get process still exists. "Workaround""A" viewing process (using grep directives to filter other processes)ps-e | grep apt"B" apt-get process still exists6362? 00:00:00 apt6934? 00:00:00 apt-get"C" destruction processsudo killall aptsudo killall apt-get"D" re-executionsudo apt-get update

Apt-get Error