Operating Systems Assignment for CMSI 387: I/O and File 'Gymnastics' - Spring 2009 - Prof., Assignments of Operating Systems

CMSI 387

Spring 2009

Assignment 0212

This assignment seeks to give you a little I/O agility and file manipulation practice, plus additional introduc-

tory reading for the areas covered since last time.

Not for Submission

Supplemental reading for what has been covered so

far includes the conceptual parts of Sections 13.1–

(of course, that computer must have the needed

tools to accomplish these tasks), and record the

listed artifacts as evidence of your activities:

1.Create an ssh tunnel from this computer to a

service that is visible from another ssh-capable

computer (but, of course, not necessarily visible

from the computer you’re using). Then, access that

service from your computer through localhost and

the tunneled port number.

• Submit the command you used to create the

long download…) inside a screen session; logout

of that computer entirely, login again, and re-

connect to that screen session, to prove to your-

self that the process has continued to run

without interruption.

• Submit the commands used for performing

this activity

• Submit screenshots of your long-running

command before you logged out, then after

you reconnected to it

4. On a Keck lab machine, create a file within

your home directory. Run ls -i to determine

that file’s inode number. Move this file to an-

other directory inside your home directory,

then move it to /tmp, then move it back to your

home directory. After each move, use ls -i to

see its inode number.

• Submit the commands that you used to cre-

ate the file then move it around

• Submit the output of ls -i both right after you

tool for this, submit a screenshot

• Submit the output provided by the command

(or a screenshot showing the information, if

you used a GUI tool)

Commit your answers as a LaTeX document (in-

cluding image files if necessary) under /homework/

cmsi387/gymnastics.