How to Run Unix Commands on Netapp filer ?

[root@adminhost ~]# rsh testfiler

testfiler>
java netapp.cmds.jsh
java netapp.cmds.jsh
IOException
jsh>

jsh> ?
?
Java Shell commands:
        cd [directory]
        pwd
        ls [-l]
        cat file
        rm file [file2 ...]
        cp src dest
        mv src dest
        ps [-l]
        kill <-1|-9> threadName
        gc
        classpath [pathname]
        syspath [pathname]
        Debug on|off
        threads
        monitors
        heap
        version
        syncdb
        du [-sk] [files or directories]
        java_class [&]
        ONTAP_cmd
jsh>