Nagios monitoring host display down, monitored services are normal

Migrating Nagios monitoring Encounters this problem: the Nagios monitoring host displays down and the monitored services are normal.

Query a lot of information is that the server disables all pings caused;

View the firewall configuration under the new server, Port 5666 is OK, the Monitoring Server Check_nrpe script can be used normally

Had not found the problem for a period of time, and later

View Nagios logs to find error content

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Simply use Check_ping to try, the result:

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Error message-bash:/usr/local/nagios/libexec/check_ping:/lib/ld-linux.so.2:bad ELF interpreter:no such file or directory

It turns out that 32-bit programs are installed on 64-bit systems. (Suddenly found himself so silly, hehe)

Workaround:
Yum Install glibc.i686

Yum Install libstdc++.so.6

Nagios monitoring host display down, monitored services are normal