To display all logs

$ journalctl

To display the new entries first in logs

$ journalctl -r

To display a specific number of log entries

$ journalctl -n 5

To retrieve log entries containing a specific keyword

$ journalctl | grep <keyword>

$ journalctl | grep nginx

$ journalctl | grep apache2

To display log entries based on their priority level

$ journalctl -p warning

To display verbose output

$ journalctl -o verbose

To view information about previous system boots

$ journalctl --list-boots

To print help options

$ journalctl --help

regards,

T.Dhanasekar