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Executable Permissions
The next thing we have to do is make our script executable. This is easily done using
chmod:
[me@linuxbox ~]$ ls -l hello_world
-rw-r--r-- 1 me me 63 2009-03-07 10:10 hello_world [me@linuxbox ~]$ chmod 755 hello_world
[me@linuxbox ~]$ ls -l hello_world
-rwxr-xr-x 1 me me 63 2009-03-07 10:10 hello_world
[me@linuxbox ~]$ ls -l hello_world
-rw-r--r-- 1 me me 63 2009-03-07 10:10 hello_world [me@linuxbox ~]$ chmod 755 hello_world
[me@linuxbox ~]$ ls -l hello_world
-rwxr-xr-x 1 me me 63 2009-03-07 10:10 hello_world
There are two common permission settings for scripts; 755 for scripts that everyone can execute, and 700 for scripts that only the owner can execute. Note that scripts must be readable in order to be executed.