sudo install java-jre E: Unable to lock the administration directory (/var/lib/dpkg/), are you root? 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: how to fix could not fix var lock /var/lib/dpkg/lock ubuntu

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