login as: root
root@192.168.1.22's password:
Last login: Wed Aug 21 15:10:44 2013 from 192.168.1.19
[root@zenoss ~]# su zenoss
[zenoss@zenoss root]$ zenping stop
stopping...
[zenoss@zenoss root]$ delete $ZENHOME/log/zenping.log
bash: delete: command not found
[zenoss@zenoss root]$