/Shell/Bash/Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)

Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)

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

E: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied) E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?

sudo must be used before and after &&
Example:

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

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?

ps aux | grep -i apt

sudo kill <process_id>
# 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 <process_id>
# 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

Source: itsfoss.com

E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)

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

Source: linuxuprising.com

E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)

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

Source: askubuntu.com

E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)

#You can delete the lock file with the following command.sudo rm /var/lib/apt/lists/lock#You may also need to delete the lock file in the cache directorysudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock

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