When monitoring a server process/services using check_procs plugin
On new servers x64 many times you will get this error
# ./check_procs
-bash: ./check_procs: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory
The solution is to install:
glibc.i686 : The GNU libc libraries
# yum -y install glibc.i686
# ./check_procs
PROCS OK: 110 processes