Table of Contents

Part 1

Entries

Entry 1: January 24, 2012

Today I experienced some trouble with the Class Chat. The ctrl + a release both tap d wasn't working on my original chat so i made a new one. With the new chat up I first tested that i could detatch from the chat with ctrl + a release both tap d and it worked so i was happy. But sadly, when i reattched to the chat i realized i couldn't type anything. So after again making a new one that works correctly now i still can't get rid of the one that i can't type /quit in. Hopefully the answer will dawn upon me sooner than later but having to take the long way into talking to my class mates is well worth it for their help.

Entry 2: January 25, 2012

Today Wedge helped me learn a new command “the 'kill' command”. A little bit about the “kill” command: kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec … or kill -l [sigspec]. What the kill command does is that it your having trouble with a bash (like i was with the screen) you issue this command to terminate the process. The reason why it was related to the course is because that I was having trouble with my screen that i couldn't do anything in. After wedge issued the kill command on the process I didn't have to use screen -r 23478 to re-attatch myself to the classroom chat screen that worked. Maybe the kill command can help you guys out if you have a troublesome bash.

Entry 3: February 5, 2012

This is my attempt to make an ASCII tree of my home directory.

unix_ascii_chart.xlsx

Entry 4: Feburary 29, 2012

Lately the labs and case studies have been easier to understand. I don't really know why but I think it's because the way I have been thinking lately (more out of the box) has really helped in figuring out the “puzzles” in the labs. I don't really know much of languages but I have been learning on how to write in pseudocode (←-sp?) and if it doesn't make any sense to anybody let me know and i will try and make it more clear to them.

Keywords

unix Keywords

Keyword "cd"

Definition

My definition of the command “cd” is that it is an abbreviation of change directory. With just the command “cd” it will, by default, change the directory to the home directory. If the command “cd src” is used then the directory will be changed (like in the demonstration). With the command “cd ..” the directory will go to the one previous the one it is currently in. (as shown in the demonstration again). Also the command cd can be used to change to directories in directories such as my example, “cd src/src/unix” which will take my directory and change it to “lab46:~/src/src/unix$”

Demonstration
lab46:~$ cd src
lab46:~/src$ cd ..
lab46:~$ cd src/src/unix
lab46:~/src/src/unix$

Keyword "pwd"

Definition

The command “pwd” means that it will show the path that the current working directory is in. The directory path to the home directory, for me, is “/home/mfaucet2”. As the command “cd” is used the pwd output is either longer or shorter.

Demonstration

Demonstration of the chosen keyword.

lab46:~$ pwd
/home/mfaucet2
lab46:~$ cd src
lab46:~/src$ pwd
/home/mfaucet2/src
lab46:~/src$ cd /home/mfaucet2
lab46:~$ pwd
/home/mfaucet2
lab46:~$ cd ..
lab46:/home$ pwd
/home
lab46:/home$ cd ..
lab46:/$ pwd
/
lab46:/$

Keyword "mv"

Definition

The “mv” command is just a sorter way to say move. The “mv” command has two functions; One function is to move the command (obviously). The second function is to rename the file/directory/archive/what-ever. A way that I found to use the “mv” command is the following: mv “filename” -t (I think “-t” is “to”) “new filename or new directory location” and voila the file is moved.

Demonstration

Demonstration of the chosen keyword.

lab46:~$ ls
Maildir          badname         file.txt.gz  shell
archive1.tar.gz  badname.tar.gz  lab2         src
archive2.zip     courses.html    lyrics.mp3   src.bak
archives         **example.txt**     public_html  the answer.txt
lab46:~$ mv example.txt example1.txt
lab46:~$ ls
Maildir          badname         file.txt.gz  shell
archive1.tar.gz  badname.tar.gz  lab2         src
archive2.zip     courses.html    lyrics.mp3   src.bak
archives         **example1.txt**    public_html  the answer.txt
lab46:~$ mv example1.txt -t src
lab46:~$ ls
Maildir          archives        courses.html  lyrics.mp3   src
archive1.tar.gz  badname         file.txt.gz   public_html  src.bak
archive2.zip     badname.tar.gz  lab2          shell        the answer.txt
lab46:~$ cd src
lab46:~/src$ ls
**example1.txt**  src
lab46:~/src$

Keyword "touch"

Definition

“touch” isn't touching a file or directory or archive. The command “touch” is how files are created. Using the “touch” command can be used to create 1 - x amount of files all in the same command.

Demonstration

Demonstration of the chosen keyword.

lab46:~/messaround$ touch example.txt
lab46:~/messaround$ ls
example.txt
lab46:~/messaround$ touch example1.txt example2.txt example3.txt
lab46:~/messaround$ ls
example.txt  example1.txt  example2.txt  example3.txt
lab46:~/messaround$

Keyword "motd"

Definition

“motd” is the message of the day. It is displayed after the user logs in or after using the command “motd”.

Demonstration
lab46:~$ motd
 __         _     _ _   __   . . . . . . . . . . . . . . . . . . . . . . . . .
|  |   __ _| |__ / | |_/ /   . Basic System Usage:  Type 'usage' at prompt   .
|  |__/ _` | '_ \\_  _/ _ \  . Events and News:     Type 'news' at prompt    .
|_____\__,_|_.__/  |_|\___/  . Broken E-mail?       Type 'fixmail' at prompt .
---------------------------  . Check Lab46 Mail:    Type 'alpine' at prompt  .
c o r n i n g - c c . e d u  . . . . . . . . . . . . . . . . . . . . . . . . .

 Lab46 is the Computer & Information Science Department's Student Development
 Server for Computer-related coursework, projects, and exploration.  For more
 information, please check out:
  .. .  .    .        .                .                .        .    .  . ..
 .  Lab46 Web Page:       http://lab46.corning-cc.edu/                       .
 .  Lab46 Help Form:      http://lab46.corning-cc.edu/help_request           .
 .  Help E-mail:          haas@corning-cc.edu or wedge@lab46.corning-cc.edu  .
  .. .  .    .        .                .                .        .    .  . ..
lab46:~$

Keyword "ctrl a + d"

Definition

Another way to logout, or exiting a screen.

Demonstration

Demonstration of the chosen keyword.

lab46:~$ screen -r
[detached from 23478.pts-5.lab46]
lab46:~$
lab46:~$ logout

The above is what it shown in a split second after pressing “ctrl a + d”

Keyword "screen"

Definition

A simple way to enter a irssi chat after setting one up.

Demonstration

Demonstration of the chosen keyword.

lab46:~$ screen -ls
There is a screen on:
        23478.pts-5.lab46       (01/24/2012 12:43:26 PM)        (Detached)
1 Socket in /var/run/screen/S-mfaucet2.

lab46:~$ screen -r 23478
[detached from 23478.pts-5.lab46]
lab46:~$ screen -ls
There is a screen on:
        23478.pts-5.lab46       (01/24/2012 12:43:26 PM)        (Detached)
1 Socket in /var/run/screen/S-mfaucet2.

lab46:~$ screen -d
There is a screen on:
        23478.pts-5.lab46       (01/24/2012 12:43:25 PM)        (Detached)
There is no screen to be detached.
lab46:~$

Keyword "alpine"

Definition

My definition of “alpine” is the Unix mailing system.

Demonstration
  ALPINE 2.00   MAIN MENU              Folder: INBOX               14 Messages +


          ?     HELP               -  Get help using Alpine

          C     COMPOSE MESSAGE    -  Compose and send a message

          I     MESSAGE INDEX      -  View messages in current folder

          L     FOLDER LIST        -  Select a folder to view

          A     ADDRESS BOOK       -  Update address book

          S     SETUP              -  Configure Alpine Options

          Q     QUIT               -  Leave the Alpine program




                  Copyright 2006-2008 University of Washington
                    [Folder "INBOX" opened with 14 messages]
? Help                     P PrevCmd                 R RelNotes
O OTHER CMDS > [ListFldrs] N NextCmd                 K KBLock

unix Objective

Objective

To learn more about how Unix functions and learn the commands to help make everyday work easier.

Definition

The easiest way to find out the functions of Unix is to play around with them. Some help with work that needs to be done and other help make the experience more enjoyable. All around Unix just helps makes doing things easier.

Method

In order to help me achieve higher learning in Unix i will have to do the assignments for the Unix Fundamentals class. In order to do these I will have to be fully engaged in critical thinking and completely indulged in the work that needs to be done.

Measurement

After following my method of achieving higher learning in Unix I have now understood the most recently due assignments after learning how Unix commands work. To achieve this I did what my method said and have handed in my assignments on time.

Analysis

The keywords in the above part of the opus are commands that I have become more familiar with and are more comfortable using those commands without making a huge mess in my virtual machine, like I was when the class first started out.

Experiments

Experiment 1

Question

Can I remove more than 1 file while using the “rm” command?

Resources

None used

Hypothesis

I believe that I can remove more than 1 file at a time using the “rm” command because with the “touch” command I can create more files with 1 command.

Experiment

I have already created files using the touch command and I will use the rm command to see if i can remove them all at once.

Data

lab46:~/messaround$ ls
example.txt  example1.txt  example2.txt  example3.txt
lab46:~/messaround$ rm example.txt example1.txt example2.txt example3.txt
rm: remove regular empty file `example.txt'? yes
rm: remove regular empty file `example1.txt'? yes
rm: remove regular empty file `example2.txt'? yes
rm: remove regular empty file `example3.txt'? yes
lab46:~/messaround$ ls
lab46:~/messaround$

Analysis

My hypothesis was correct and through typing the file names after the first I was prompted to delete them all, but it was still prompting me one at a time for each file.

Conclusions

I have discovered that the touch command along with the rm command have some similarities with each other in that they can both manipulate multiple files at once.

Experiment 2

Question

Am I able to remove a directory while it still has files in it?

Resources

None used

Hypothesis

I believe I will be able to remove the directory that has files in it because it would be like removing a folder in a GUI environment, where if it has files in it the user would just be prompted if he/she would want to remove the folder or in a CLI enviroment a directory.

Experiment

I have a mess around directory that has nothing important in it and have four files that are blank. After using the rmdir command on /messaround hopefully the directory will be removed.

Data

lab46:~/messaround$ ls
example.txt  example1.txt  example2.txt  example3.txt
lab46:~/messaround$ cd ..
lab46:~$ rmdir messaround
rmdir: failed to remove `messaround': Directory not empty
lab46:~$

Analysis

My hypothesis was incorrect. The directories in a cli are different than folders in a gui environment; tho they have the same purpose.

Conclusions

I have found that in order to remove a directory, whatever is in it must also be removed in order to remove the directory.

Experiment 3

Question

Can I attach to an active screen?

Resources

None used

Hypothesis

I don't believe I can attach to an active screen, because I'm technically already on it. i would have to detach myself then reattach myself to the screen.

Experiment

I'm going to exit out of the screen by exiting my virtual machine and seeing if the screen is attached. If it is I can further go the experiment by using screen -r to reattach myself to the screen, if not I will have to use screen -d then screen -r to reattach myself to the screen.

Data

lab46:~$ screen -ls
There is a screen on:
        23478.pts-5.lab46       (01/24/2012 12:43:26 PM)
1 Socket in /var/run/screen/S-mfaucet2.
lab46:~$ screen -r
There is a screen on:
        23478.pts-5.lab46       (01/24/2012 12:43:26 PM)        (Attached)
There is no screen to be resumed.
lab46:~$ screen -d
[23478.pts-5.lab46 detached.]

lab46:~$ screen -ls
There is a screen on:
        23478.pts-5.lab46       (01/24/2012 12:43:26 PM)        (Detached)
1 Socket in /var/run/screen/S-mfaucet2.

lab46:~$ screen -r
[detached from 23478.pts-5.lab46]
lab46:~$

Analysis

Based on the data collected: My hypothesis was correct as shown above. I could not attach to a attached screen because it was already on. After detaching the screen i was then able to attach myself to the detached screen.

Conclusions

I have learned that screens are like different sections of the server. If they are accessed when somebody is already on their screen they will either have to: make another screen, detach from the active screen and reattach themselves to it, or use screen -x to override the attached screen error.