Why I can't change directories using “cd”?

Question

I\'m trying to write a small script to change the current directory to my project directory:

#!/bin/bash
cd /home/tree/projects/java

I save

Answer 1

You can use . to execute a script in the current shell environment:

. script_name

or alternatively, its more readable but shell specific alias source:

source script_name

This avoids the subshell, and allows any variables or builtins (including cd) to affect the current shell instead.