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I am trying to send a variable to shell script from jsp. i.e 

txtstr="xxx"
Process p=Runtime.getRuntime().exec("filename.sh txtstr");

or 

Process p=Runtime.getRuntime().exec("filename.sh 'txtstr'");

But it is taking argument as a txtxstr but not its value. How to solve this?

Thanks

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But it is taking argument as a txtxstr but not its value.

because you are passing txtstr as string. It should be...

txtstr="xxx";
Process p=Runtime.getRuntime().exec("filename.sh "+txtstr);
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HI Its not working. null is passed as argument to shell script.

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