Shell/Bash: could not open lock file /var/lib/dpkg/lock-frontend - open (13: permission denied) Example

Shell/Bash Example: This is the "could not open lock file /var/lib/dpkg/lock-frontend - open (13: permission denied)" Example. compiled from many sources on the internet by SimpleTutorials.org

Method 1
ps aux | grep -i apt
sudo kill -9 

Method 2

sudo lsof /var/lib/dpkg/lock
sudo lsof /var/lib/apt/lists/lock
sudo lsof /var/cache/apt/archives/lock

sudo kill -9 

sudo rm /var/lib/apt/lists/lock
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock

sudo dpkg --configure -a

sudo apt update

Try 'sudo apt-get update' or 'sudo apt-get upgrade'

ps aux | grep -i apt

sudo kill 
# Check if the process was killed by running the ‘ps aux | grep -i apt’ command. If it is still running, force kill it with SIGKILL signal:

sudo kill -9 
# Another, easier way would be to use the killall command. This will kill all the instances of a running program:

sudo killall apt apt-get

sudo must be used before and after &&
Example:

sudo apt-get update && sudo apt-get upgrade

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

sudo rm /var/lib/apt/lists/locksudo rm /var/lib/apt/lists/lock-frontend

* Summary: This "could not open lock file /var/lib/dpkg/lock-frontend - open (13: permission denied)" Shell/Bash Example is compiled from the internet. If you have any questions, please leave a comment. Thank you!