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.
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.