i have an error faced while configuring the nrpe

Reading configuration data...

Error: Invalid max_attempts, check_interval, retry_interval, or notification_interval value for service '/dev/hda1 Free Space' on host 'remotehost'
Error: Could not register service (config file '/usr/local/nagios/etc/services.cfg', starting on line 56)

***> One or more problems was encountered while processing the config files...

Check your configuration file(s) to ensure that they contain valid
directives and data defintions. If you are upgrading from a previous
version of Nagios, you should be aware that some variables/definitions
may have been removed or modified in this version. Make sure to read
the HTML documentation regarding the config files, as well as the
'Whats New' section to find out what has changed.


the defination of services.cfg.

# Service definition
define service{
# Name of service template to use
use generic-service
host_name loc
service_description PING
is_volatile 0
check_period alltime
max_check_attempts 5
normal_check_interval 5
retry_check_interval 1
contact_groups nagios
notification_interval 960
notification_period alltime
notification_options w,u,c,r
check_command check_ping!100.0,20%!500.0,60%


active_checks_enabled 1 ;
passive_checks_enabled 1 ;
parallelize_check 1 ;
obsess_over_service 1 ;

obsess_over_service 1 ;
check_freshness 0 ;
notifications_enabled 1 ;
event_handler_enabled 1 ;
flap_detection_enabled 1 ;
failure_prediction_enabled 1 ;
process_perf_data 1 ;
retain_status_information 1 ;
retain_nonstatus_information 1 ;
register 0 ;
}


define service{
use generic-service
host_name remotehost
service_description CPU Load
check_command check_nrpe!check_load
}

define service{
use generic-service
host_name remotehost
service_description Current Users
check_command check_nrpe!check_users
}

define service{
use generic-service
host_name remotehost
service_description /dev/hda1 Free Space
check_period alltime
check_command check_nrpe!check_hda1
}
define service{
use generic-service
host_name remotehost
service_description Total Processes
check_command check_nrpe!check_total_procs
}

define service{
use generic-service
host_name remotehost
service_description Zombie Processes
check_command check_nrpe!check_zombie_procs
}
define service{
use local-service
host_name remotehost
service_description Swap Usage
check_command check_nrpe!check_swap
}

The error message says it all you need to set proper values for

could you give some examples

I don't know much about nagios, but I think in the service description part of the above service definition could be the culpirit. Try to keep '/dev/hda' in single quotes or use a string without '/'.

this didnot work. any other solution

define service{
use generic-service
host_name remotehost
service_description /dev/hda1 Free Space
check_period alltime
check_command check_nrpe!check_hda1
}

This doesn't seem to work on ubuntu machine

Tried the command from Nagios host

$ /usr/lib/nagios/plugins/check_nrpe -H devlamp01 -c check_hda1

And I get the result

DISK CRITICAL - /dev/hda1 is not accessible: No such file or directory


From the client side, there is no /dev/hda1 folder in ubuntu.

Not a direct answer to your question but I found it's better to use SNMP over NRPE. I used to use NRPE years ago & then switched SNMP. SNMP comes with more Linux distros; so you don't need to worry about installing just another extra package (NRPE). It's also easy to configure (as far as Nagios is concerned).

Here's copy of my snmpd.conf on client machines (it is used to check disk space, total processes, specific system processes, SNMP uptime & various other things)