Faruque Ahmed : MCP, MCSA, MCSE, MCTS, MCIT, CCNA, OCA, OCP, GCP

error-APT

Frontend is locked by another process

$ ps aux | grep -i apt

$ sudo kill -9 <PID>

$ sudo killall program_name

sudo lsof /var/lib/dpkg/lock-frontendsudo kill -9 PID # Replace PID with the process ID if found

sudo apt clean sudo reboot sudo rm /var/lib/dpkg/lock-frontendsudo dpkg --configure -a

--------------------------------E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
# apt install software-properties-common
E: Could not get 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?

sudo killall apt apt-get

If none of the above works, remove the lock files. Run in terminal: (Note that this can seriously break your system.)

sudo rm /var/lib/apt/lists/lock

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

sudo rm /var/lib/dpkg/lock*

sudo rm -v /var/lib/dpkg/lock-frontend

then reconfigure the packages. Run in terminal:

sudo dpkg --configure -a

apt install -f

and

sudo apt update

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