Nagios Support Forum

I have already disabled.


# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
# targeted - Targeted processes are protected,
# mls - Multi Level Security protection.
SELINUXTYPE=targeted

Did you reboot the machine after changing the SElinux file?

Yes, many times.

Please post the output of the following two commands on the nagios server: (this will show your kernel version and processor architecture)

and
(this will show details about that check_nrpe binary you are trying to execute; correct the path to check_nrpe if necessary)

Running a 64bit binary on a 32bit kernel will result in 'cannot execute binary file'.

uname -rp
2.6.32-504.8.1.el6.i686 i686


file /usr/local/nagios/libexec/check_nrpe
/usr/local/nagios/libexec/check_nrpe: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, stripped

You have a 32 bit install of linux (see the i686 in the uname output? It would say 'x86_64' if it was a 64bit kernel); you are trying to run a 64bit binary version of check_nrpe (the 64-bit part of the output of the file command tells you this). This will not work. If you want to use a 32bit version of linux, you need to use a 32bit version of check_nrpe.

I am assuming you copied that check_nrpe from another system that was 64bit.

Millisa is correct. You will need to get nrpe/plugins from you package manager or build it from source to acquire a 32 bit version.

I have resolved the issue, please marked as close.