APT/DPKG LOCKED ERROR

E: Could not get lock /var/lib/apt/lists/lock

E: Unable to write to /var/cache/apt/
E: The package lists or status file could not be parsed or opened.




E: Could not get lock /var/lib/dpkg/lock

E: Unable to lock the administration directory (/var/lib/dpkg/)

You can force the lock off by removing the file, but it's not recommended without first closing the program that's holding the lock safely, since you could cause corruption or interrupt an installation (bad). The command provided below should close the program that holds the lock and then remove the lock but won't protect you from install interruption:




Ctrl + Alt + F2    (To go to tty2 session to run below commands)




fuser -cuk /var/lib/dpkg/lock; sudo rm -f /var/lib/dpkg/lock

fuser -cuk /var/cache/apt/archives/lock; sudo rm -f /var/cache/apt/archives/lock

OR 

Remove lock files directly

sudo rm /var/lib/dpkg/lock


sudo rm /var/cache/apt/archives/lock

OR

kill the process holding lock files

ps -e | grep -e apt -e dpkg | grep -v grep

kill [PID OF APT, DPKG]

Then Run Below Commands Perspectively

For aptitude run

apt-get -f install

For dpkg run

dpkg --configure -a