updated notes

src/rhcsa.md

@@ -831,3 +831,11 @@ sudo systemctl status rsyslog # Display the status of the rsyslog service
 sudo nano /etc/logrotate.conf # Edit the logrotate configuration file\
 ```
 
+### logger
+```bash
+logger "This is a test message" # Log a message
+
+logger -p local0.info "This is a test message" # Log a message to the local0.info facility
+
+sudo tail /var/log/messages # Display the messages
+```