OBJECTIVE: Set default permissions.

DESCRIPTION: In this hands$-$on project, you view and manipulate the default file and directory permissions using the umask variable.

$1$

Switch to a command$-$line terminal $($tty$5)$ by pressing Ctrl$+$Alt$+$F$5$ and log in to the terminal using the user name of user$1$ and the password of LINUXrocks!.

$2$

At the command prompt, type umask and press Enter. What is the default umask variable?

$3$

At the command prompt, type touch utest$1$ and press Enter. Next, type ls $–$l at the command prompt and press Enter. What are the permissions on the utest$1$ file? Do these agree with the calculation in Figure $4-4?$ Create a new directory by typing the command mkdir udir$1$ at the command prompt and pressing Enter. Next, type ls $–$l at the command prompt and press Enter. What are the permissions on the udir$1$ directory? Do these agree with the calculation in Figure $4-4?$

$4$

At the command prompt, type umask $007$ and press Enter. Next, type umask at the command prompt and press Enter to verify that your umask variable has been changed to $007.$

$5$

At the command prompt, type touch utest$2$ and press Enter. Next, type ls $–$l at the command prompt and press Enter. What are the permissions on the utest$2$ file? Do these agree with the calculation in Figure $4-5?$ Create a new directory by typing the command mkdir udir$2$ at the command prompt and pressing Enter. Next, type ls $–$l at the command prompt and press Enter. What are the permissions on the udir$2$ directory? Do these agree with the calculation in Figure $4-5?$

$6$

Type exit and press Enter to log out of your shell.