bash bad interpreter permission denied

Csisanyi

11/24/23, 8:07 PM

I have a freshly installed Ubuntu 22.04.

I'm trying to execute a single-file java code

./SingleFileSource

I get the following error

bash: ./SingleFileSource: /usr/bin/java: bad interpreter: Permission denied

I tried

chmod +rwx SingleFileSource
chmod +rwx /usr/bin/java

also tried to execute it as root but I'm getting the same error

On my previous Ubuntu 20.04 I was able to execute the code and I don't remember if I ever had to set any permissions explicitly.

Any ideas?

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TonyB

11/24/23, 9:05 PM

The error message indicates bash is having a problem with the "shebang" in the script... i.e. the first line which indicates the command interpreter. Further, the message indicates you are trying to use /usr/bin/java.... [This Link](https://www.jetbrains.com/help/idea/shebang-scripts.html) indicates you should specify the path to the JDK... is /usr/bin/java the JDK?? If it is, then perhaps you should add the contents of SingleFileSource to your question.

Csisanyi

11/24/23, 9:49 PM

Yes, my JDK is at ```usr/bin/java``` and the shebang is ```#!/usr/bin/java --source 17``` I'm not sure if the content matters, it's a simple class with a main method and some functions

Csisanyi

11/24/23, 9:57 PM

@TonyB What is interesting, if I rename the file with .java, remove the shebang and run it like java SingleFileSource.java it executes.

Esther

11/25/23, 12:00 AM

can you put output of `which java`? can you confirm that output is the same as `/usr/bin/java`? that doesn't sound right.

TonyB

11/25/23, 3:44 AM

I'm not a Java maven, but the link I gave you shows and example that ends: "--source 11" Could that be the problem? And as @Esther requested, could you provide the output of "which java" and confirm that output is the same as "/usr/bin/java"

Csisanyi

11/25/23, 10:30 AM

@Esther @TonyB Thanks! ```Which java``` solved the issue, usr/bin/java was not the correct path, I only had a copy of the jdk in usr/bin/java

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