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how to monitor haproxy using nagios

Hello, i cannot monitor my HAProxy server through nagios i got the below error when i am try to execute the haproxy plugin

[[email protected] libexec]# ./check_haproxy.rb -u http://192.168.1.13:9099/haproxy?stats -U admin -P pass -w 95 -c 100
bash: ./check_haproxy.rb: /usr/bin/ruby^M: bad interpreter: No such file or directory

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