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

Example 1: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)

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

Example 2: E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)

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