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Editorial Team
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Asked: 2026-06-08T19:54:20+00:00

I am writing a Shell Script where user will pass the path to JAVA_HOME

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I am writing a Shell Script where user will pass the path to JAVA_HOME as a parameter. I wanted to check whether the JAVA_HOME path is valid or not. So how can I check whether the input path passed is a exe file ( Unix Executable File ) or not ? Suppose if users passed /usr/bin/java – which is valid, if user passes like /usr/bin/test.txt ( some text file )- which is not valid. So how can I check whether the file is of type Unix Executable File ?

I tried with -x , guess that is not the rite check , since it returns true for /usr/bin also !!!

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1 Answer

  1. Editorial Team

    Easiest way is to use the file command.

    $ file /usr/bin
/usr/bin: directory
$ file /usr/bin/java
/usr/bin/java: Mach-O universal binary with 2 architectures
/usr/bin/java (for architecture x86_64):    Mach-O 64-bit executable x86_64
/usr/bin/java (for architecture i386):  Mach-O executable i386
$ 

    You can just grep the output of file for a suitable string, e.g. “executable”.

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