NRPE: Command ‘check_linux_stats.pl’ not defined

I have run the install as described below

#Get and scp the files:
wget http://search.cpan.org/CPAN/authors/id/M/MS/MSCHWERN/Test-Simple-0.98.tar.gz
wget http://search.cpan.org/CPAN/authors/id/B/BL/BLOONIX/Sys-Statistics-Linux-0.66.tar.gz

# On the host get makemaker:
yum install perl-ExtUtils-MakeMaker.ppc64 -y
# Install the required modules:
tar xzf Test-Simple-0.98.tar.gz
cd Test-Simple-0.98
perl Makefile.PL
make
make test
make install
cd ..
tar xzf Sys-Statistics-Linux-0.66.tar.gz
cd Sys-Statistics-Linux-0.66
perl Makefile.PL
make
make test
make install

and put in the entries as you described
# command.cfg on nagios server
# $ARG1$ = check_cpu_usage,check_mem_usage,etc..

define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}

# nrpe.cfg on the remote server
command[check_cpu_usage]=/usr/local/nagios/libexec/check_linux_stats.pl -C -w 90 -c 100 -s 5

command[check_load_average]=/usr/local/nagios/libexec/check_linux_stats.pl -L -w 10,8,5 -c 20,18,15

command[check_memory_usage]=/usr/local/nagios/libexec/check_linux_stats.pl -M -w 99,50 -c 100,50

command[check_disk_usage]=/usr/local/nagios/libexec/check_linux_stats.pl -D -w 10 -c 5 -p /,/usr,/tmp,/var

command[check_disk_io]=/usr/local/nagios/libexec/check_linux_stats.pl -I -w 100,70 -c 150,100 -p sda1,sda2,sda4

command[check_network_usage]=/usr/local/nagios/libexec/check_linux_stats.pl -N -w 30000 -c 45000 -p eth0

command[check_open_files]=/usr/local/nagios/libexec/check_linux_stats.pl -F -w 10000,150000 -c 15000,250000

command[check_socket_usage]=/usr/local/nagios/libexec/check_linux_stats.pl -S -w 1000 -c 2000

command[check_number_procs]=/usr/local/nagios/libexec/check_linux_stats.pl -P -w 1000 -c 2000

but i get a NRPE: Command ‘check_linux_stats.pl’ not defined

am i missing something in the host config file hostname.cfg ?

any help welcome thanks 🙂

Paul