Hi, I get it!! Well, the problem was in the content of the url. It has special caracters like: ? _ - = So, I have only to add " before and after argument. Like this: ./check_http -H host -p 444 -S -u "url_secure" -s "string " That's all!! (It was easy) <div>On 10/26/06, Christopher Odenbach <<a href="mailto:odenbach@uni-paderborn.de">odenbach@uni-paderborn.de </a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi, > But when I try in a web secure, Nagios say that the '-s' command is > not found, and after this, Invalid HTTP response received from host > on port 444 > > ./check_http -H host -p 444 -S -u url_secure -s string > > -s: command not found > Invalid HTTP response received from host on port 444 This look like a shell error, not a plugin output. Maybe a semicolon somewhere in url_secure? > (The url is something like this: > <a href="https://xxxxxxx.com:444/part1/part2/part3">https://xxxxxxx.com:444/part1/part2/part3 </a> ) > > Can sombedy help me to know, how I can find a string in a web secure? Please post the complete command line you use. There is no point in hiding the URL - either it is public, then who cares. Or it is private, then we won't be able to access it, so no problem again. Christopher -- ====================================================== Dipl.-Ing. Christopher Odenbach Zentrum fuer Informations- und Medientechnologien Universitaet Paderborn Raum N5.110 <a href="mailto:odenbach@uni-paderborn.de">odenbach@uni-paderborn.de</a> Tel.: +49 5251 60 5315 ====================================================== </blockquote></div>