Answers for "fatal: open lock file /var/lib/postfix/master.lock: cannot open file: permission denied"

Shell/Bash

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

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

Posted by: Guest on January-08-2021

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

Posted by: Guest on January-09-2021

Code answers related to "fatal: open lock file /var/lib/postfix/master.lock: cannot open file: permission denied"

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Answers for "fatal: open lock file /var/lib/postfix/master.lock: cannot open file: permission denied"

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