[mrtg] perl script cannot be executed by MRTG

[xzhao2]

I am using threshold function in MRTG (RedHat8.0). 
My mrtg.cfg goes like this:

ThreshMaxO[_]: 90%
ThreshMinO[_]: 20%
ThreshProgO[_]: /var/www/html/mrtg/threshprogi/prog-to-run

My prog-to-run is a text file starting with: #!/usr/bin/perl...

No problem with the perl script, because when I type the following line in 
shell command prompt:

perl prog-to-run ARG1 ARG2 ARG3

It works very fine. But when I run MRTG against mrtg.cfg, it says the 
threshold program cannot be executed. I guess MRTG doesn't consider my 
prog-to-run as an executable program, and even doesn't know it's a perl or a 
shell script. Something should be done with the text file.

Any help appreciated. Simon


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