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Looking for example code to execute OS commands on a server

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I am a newbie and have tried searching but could not really find what I am looking for.  I am sure I am doing something wrong.  I would really appreciate if anyone could help me with some pointers.  This is not homework!!
I have a weblogic server running on a remote unix host.
I need to somehow manage to execute OS commands on the above unix host without using SSH.
I am wondering if it would be possible to write some kind of servlets or REST end points which would accept OS commands and execute them when called remotely say from my desktop.

Please help.

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Your problem can be divided into two parts: First, you need some Java code which can execute OS commands on the host. And second, you need to embed this code in a servlet.

Clearly the second part of the problem is fairly trivial, so your problem is reduced to the first part.

So since the servlet issue isn't a problem, if you don't mind I will move this thread to a more general forum which isn't specific to servlets.

And I'll change the thread title accordingly too. Hopefully that should make it more likely that people will answer.
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Java's ProcessBuilder class can be used to execute system commands.
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But don't try anything with processes until you have understood the classic article by Michael Daconta called When Runtime.exec() won't. ProessBuider makes the operation simpler, but the principles are the same.
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And whatever you do, use white listing for allowed commands and arguments. Otherwise if someone can access the servlet, they can execute any arbitrary code. That can be as nasty as "rm -rf /" (wiping your entire hard drive), or even worse.
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