At the command prompt, type touch $/$public$/$user$1$file and press Enter. Next, type ls $-$l $/$public at the command prompt and press Enter. What files exist in this directory and who are the owners?

$12$

At the command prompt, type rm $/$public$/$user$1$file and press Enter. Were you prompted to confirm the deletion of the file?

$13$

At the command prompt, type rm $/$public$/$rootfile and press Enter. Note the error message that you receive because of the sticky bit.

$14$

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

$15$

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 root and the password of LINUXrocks!.

$16$

At the command prompt, type touch aclfile and press Enter. Next, type getfacl aclfile at the command prompt and press Enter. Are there any additional entries beyond user, group, and other?

$17$

At the command prompt, type setfacl $$m u:user$1$:r$--$ aclfile and press Enter. Next, type ls $-$l aclfile at the command prompt and press Enter. Is there a $+$ symbol following the mode? Next, type getfacl aclfile at the command prompt and press Enter. Explain the permissions. When would this permission set be useful?

$18$

At the command prompt, type setfacl $$b aclfile and press Enter. Next, type ls $-$l aclfile at the command prompt and press Enter. Is there a $+$ symbol following the mode?