Nagios Support Forum

Hello,

This may be documented somewhere but I am trying to run a plugin '.sh' (Bash) script -- check_snmp_printer (and named it with a .sh extension) from https://github.com/ynlamy/check_snmp_printer but I can't seem to run. Though I can see it with LS it reports...
bash: /usr/local/nagios/libexec/check_snmp_printer.sh: /bin/bash^M: bad interpreter: No such file or directory

However I have other .SH plugins that seem to work so I am missing something basic at the command line.

Also (probably a very silly question) but how do you single step through a pearl or bash script? What tools are available to do this?

Thanks,

Tom

Hi Tom,

First, use the Upload a Plugin feature from the Manage Plugins page in Nagios XI so the correct plugin permissions will get set automatically. To upload a plugin, go to Admin > System Extensions >Manage Plugins.
To test a plugin from the command line, follow the instructions are our knowledgebase:

Nagios XI - How To Test Check Commands From The Command-line

Lastly, to execute a bash script in debug mode, run following: Let us know if you have any other questions or need further assistance.

Thats good and I've been down that path. Apparently after some further testing I had opened up the file on my Windows 10 machine in Notepad++ but when I went to import it I didn't check the box 'Convert line endings' and that really through off Bash.

Tom

That would do it.

FYI, you could check the line endings in Linux when you open your plugin in "vi", by typing: and pressing "Enter". You should see: If you see "dos", then you would need to convert it. press Enter, then save the file and exit: Let us know if it is OK to close this topic. Thanks!

Last question, what is the best tools to use to debug a pearl or bash script?

Beyond that, YES close the thread.

Tom

You can run a bash script with "-x", and perl script with "-d" in order to debug them.

Example: