execute bash script from java

Question

I am trying to execute a bash script file , for a java program it the following way :

Runtime.getRuntime().exec("./path/to/bash");

But it seems to be not the correct way for doing it because it return the following exception:

 java.io.IOException: Cannot run program "./path/to/bash": error=2, No such file or directory

what is the correct way to do it ?

Can you check that your bash file is in the correct path relatively? You may try to change the path to an absolute one and then check it. — Jay
– Jay, Commented Feb 18, 2019 at 9:33
if the program is in the expected path, make sure that all pathes inside of the bash file are correct and all programs are in path — Jens
– Jens, Commented Feb 18, 2019 at 9:36

Nguyễn Hùng Hậu · Accepted Answer · 2019-02-18 09:33:37Z

2

java.io.IOException: Cannot run program "./path/to/bash": error=2, No such file or direct

It mean path of file was wrong. Please check file path again. What folder contains this file?

answered Feb 18, 2019 at 9:33

Nguyễn Hùng Hậu

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4 Comments

sali333 Over a year ago

The file is in my desktop

Nguyễn Hùng Hậu Over a year ago

If you are using Window. In order to execute bash file, you need input full of path Ex: C:/Users/path/to/bash

sali333 Over a year ago

I m using linux

Nguyễn Hùng Hậu Over a year ago

Please change code to Runtime.getRuntime().exec(new String[]{"sh", "-c", "/home/username/Desktop/bash"});

ajith george · Accepted Answer · 2019-02-18 12:27:14Z

Recently I used the below approach to execute a bash script.

 Process exec = getRuntime().exec("/home/user/test/test.sh");
        java.util.Scanner s = new java.util.Scanner(exec.getInputStream()).useDelimiter("\\A");
        System.out.println(s.next());

Whenever I tried getRuntime().exec("./home/user/test/test"); I got the exact error you were getting. java.io.IOException: Cannot run program "./home/user/test/test": error=2, No such file or directory. To execute any command from any directory, please follow the below approach.

String []command ={"/bin/bash","-c", "ls"};
Process exec = getRuntime().exec(command,null,new 
     File("/home/user/test"));
java.util.Scanner s = new java.util.Scanner(exec.getInputStream()).useDelimiter("\\A");
System.out.println(s.next());

Hope this is some way helpful.

Ramesh Subramanian · Accepted Answer · 2019-02-18 09:37:15Z

1

To execute any bash command using java , you can use command like Runtime.getRuntime().exec("/path-to/bash -c \"rm *.foo\"") - This will remove all the files having extension .foo in the current working directory

answered Feb 18, 2019 at 9:37

Ramesh Subramanian

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