Modify grep E localhost systemd messages to also show the li

Modify grep -E \"localhost systemd:\" messages   to also show the line numbers.

Write down the command.

Solution

The -n option is used with grep to show the line number.

So, to display the line numbers also, the command:
grep -E \"localhost systemd:\" messages

could be modified as:
grep -E -n \"localhost systemd:\" messages