The Isilon Web GUI is a service that can be disabled and enabled using the isi services command. To restart the web gui, disable it, then enable it using the commands below:  # isi services -a isi_webui disable # isi services -a isi_webui enable
How do I restart the Isilon web GUI if it starts acting strange? 
How do I restart the Isilon web GUI if it starts acting strange?