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Assignment 3A    30 points     
Due in drop box   - Close of lab.

Because these are written assignments, they must be in the drop box on time.

	Permissions for user
----------------------	--------------------------------	--------------------------------	--------------------------------
Commands	rw-	-wx	r-x
cd dir1	11	12	13
cd $HOME/330
ls dir1	21	22	23
cat dir1/b	31	32	33
cp dir1/b c	41	42	43
mv a dir1/c	51	52	53
rm dir1/b	61	62	63
rmdir dir1	71	72	73
rm -r dir3	81	82	83
rmdir dir2	91	92	93
rm -r dir4	A1	A2	A3

Note:  for all three parts of this assignment, you are to print out the 
web pages and fill in the information.  There is nothing to email your 
TA.  However, it also means that the assignment must be in the drop box
by the due date and time. 

1.  Change to your 330 directory.
2.  Make the following directories   dir1, dir2, dir3 and dir4
3.  Make the file  a  in the 330 directory.  Use touch to create a file.   
     touch a
4.  In both dir1 and dir3, make the file b.  Use touch again  
     touch dir1/b; touch dir3/b

5.a. In the table above there are a series of commands list down the left hand 
side and a series of permissions across the top.  For this assignment, you 
are to set owner(user) permissions of the four directories dir1 dir2 dir3 and 
dir4 to those listed above the first permissions column and then attempt each 
command listed in the command column.  Set group and other's permissions to 
none.

5.b. In each box, record whether the command failed or suceeded.  A failure 
will be signaled by an error message from the system.  If the command fails, 
write failed in the box, also use the number in the box to indentify the 
command and permission combination that failed and write down the error 
message on a seperate sheet of paper.  If the command suceeds, write success 
in the box.

6. When you have finished the first column, change all directory permissions 
to 700.  You must now recreate/uncreate any files/directories changed in step
5.  e.g. Recreate any directories deleted, delete c from 330 directory if 
copy was successful, recreate file a, recreate dir1/b and dir3/b    

7. Now set owner permissions of all four directories to permissions listed 
above second permissions column and repeat commands listed down the left 
hand side, recording results and failure messages.

8. Repeat step 6. and set owner permissions of all directores to permissions 
listed above the last permissions column.  Repeat commands and record results.

9. When done, look at the failures in each of the permission columns and give
a general explanation on how and why a particular permission influences the 
various file commands.