Mastering Bash

Calling your script

Well, we have our two-line script; time to see if it really does what we want it to do:

gzarrelli:~$ ./test.sh-bash: ./test.sh: Permission denied  

No way! It is not executing, and from the error message, it seems related to the file permissions:

gzarrelli:~$ ls -lah test.sh -rw-r--r-- 1 gzarrelli gzarrelli 41 Jan 21 18:56 test.sh  

Interesting. Let us recap what the file permissions are. As you can see, the line describing the properties of a file starts with a series of letters and lines.

Type	User	Group	Others
-	rw-	r--	r--

 

For type, we can have two main values, d - this is actually a directory, or - and means this is a regular file. Then, we can see what permissions are set for the user owning ...