Generally few of the nagios plug will be installed to /usr/loca/nagios/libexec dir while you compiling the nagios plugins, during the isntallation of nrpe on the remote server. But few plug ins say, check_uptime is not included and you need to install it later. if you copy paste it after downloading from web site and check it from nagios server it give output like NRPE: unable to read output.
though there are many reasons for this error, if you experience this error with the plug ins you download and install manually, First reason must be file permissions and ownerships issues, so check it and change it nagios user & group.
[root@nagios ~]# ./check_nrpe -H 192.168.85.10 -c check_uptime.
NRPE: unable to read output.
NRPE: unable to read output.
though there are many reasons for this error, if you experience this error with the plug ins you download and install manually, First reason must be file permissions and ownerships issues, so check it and change it nagios user & group.
[root@nagios ~]# chown nagios. check_linux_bonding
[root@nagios ~]# chmod +x check_linux_bonding
[root@nagios ~]# chmod +x check_linux_bonding
Hope works for.
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