<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <META NAME="Generator" CONTENT="MS Exchange Server version 6.0.6472.0"> <TITLE>Using check_by_ssh and the ssh_disk command</TITLE> </HEAD> <BODY>  Hello, I am trying to use the check_by _ssh plugin to check disk space on a server. In the command.cfg file there is a command named ssh_disk, I am trying to use this example to check the /var directory. Here is the entry in the command .cfg file: command[ssh_disk]=/usr/lib/nagios/plugins/check_by_ssh -H $HOSTADDRESS$ -C '/usr/lib/nagios/plugins/check_disk -w 85% -c 95% -p $ARG1$' Here is the entry form the services.cfg file: # Service definition define service{ use generic-service ; Name of service template to use host_name nypptd.platts.mcgraw-hill.com service_description /var is_volatile 0 check_period 24x7 max_check_attempts 3 normal_check_interval 5 retry_check_interval 1 contact_groups oracle11i-admins notification_interval 240 notification_period 24x7 notification_options c,r check_command ssh_disk!/var } Here is the entry from the checkcommands.cfg file: # 'check_by_ssh' DISK command definition define command{ command_name ssh_disk command_line $USER1$/ssh_disk $ARG1$ } After making these entries and restarting Nagios I get the (Return code of 127 is out of bounds - plugin may be missing) error. Please let me know if I am doing something wronge. I am new to Nagios so that is probably the case. I would appreciated any help you can give me. Thank you, Alan DeBekker Platts Technology 212-904-3028 </BODY> </HTML>