Log in to pe15.cs.umb.edu

• Run the ssh client
  
  Connect to pe15.cs.umb.edu.

Create ex and ex3 Directories

• Make sure you are in your home directory
  

  cd

• Go to your it244 directory
  

  cd  it244

• Go to your ex directory
  

  cd  ex

• Create an ex3 directory
  

  mkdir  ex3

• Go to your ex3 directory

  cd ex3

nano

• Run nano creating a text file named today.txt

  nano  today.txt

• Practice with nano
  Write a few sentences about what you did today.
  
  Use as many of the nano commands, which you see at the bottom of the page, as you can.
  
  The ^ character you see before each letter in the help menu at the bottom of the page tells you to hold down the Control key as you type the letter of the command.
  
  Some important commands do not appear in the menu.
  
  Control A will take you to the beginning of the line, Control E will take you to the end of the line, and Control K will delete the current line.
  
  When you use Control K, the line you deleted is placed in a buffer.
  
  You can get this line back, pasting it in your current position in the file, using Control U.
• Save the file

  Control O

  After typing this command, the file name will appear at the bottom of the screen.
  
  Hit Enter to indicate that this is the correct file name.
• Quit nano
  

  Control X

• Look at the contents of the file
  

  cat today.txt

script

• Run script

  script

• Move to your home directory
  

  cd

  If you run cd without any arguments, it will take you to your home directory.
• Determine your current location.

  pwd

  You should be in /home/YOUR_UNIX_USERNAME.
• List the contents of your home directory
  

  ls

• Look at the value of the SHELL variable

  echo $SHELL

  Pay attention to capitalization. Unix is case sensitive.
  
• Quit script

  exit

• Determine your current location

  pwd

  You should be in /home/YOUR_UNIX_ID/it244/ex/ex3.
  
  When you run script, a sub-process is generated which contains a new instance of the Bash shell.
  
  Any changes you make to your environment, such as your current location, disappear when you exit script.
  
  Since you started script in your ex3 directory, that is where you will return when you exit.
  
  Any files you created or changed while you were using script will remain as you left them in your script session since they are part of the file system, not your environment.
• Look at the typescript file

  cat typescript

Stopping a Running Program

• Go to /home/ghoffman/course_files/it244_files
  

  cd /home/ghoffman/course_files/it244_files

• Run a command that won't stop

  ./forever.sh

• Stop the program

  Control C

  This is the only way you can get out.

Command Line Editing Practice

• Type something at the command line

  foo bar bletch

• Move to the beginning of the command line

  Control A

• Move to the end of the command line

  Control E

• Clear the command line

  Control U

Use the History Feature

• Retrieve the last command

  ⇑

• Keep using ⇑ until you come to
  

  cat typescript

  If you go too far use ↓ until you get to the right command.
  
• Run the cat command
  

  Enter

Look at a man Page

• Run man on ls

  man ls

• Scroll down one screen

  Space

• Scroll down one line

  Enter

• Scroll up one line

  ⇑

• Scroll down one line

  ⇓

• Quit man

  q

Experiment with apropos

• Run apropos on the word "who"

  apropos who

Use info

• Run the info command on the word "who"

  info who

• Display the help menu

  h

• Return to the who page

  l

• Quit info

  q

• Run info without an argument

  info

  You should see the first page of the info system.
• Use the down arrow to go to the line labeled "File permissions"
  
• Go to the "File permissions" page

  Enter

• Use the down arrow to go to the line labeled "Mode Structure"
  
• Go to the "Mode Structure" page

  Enter

• Return to the previous page

  l

  You should be back on the "File permissions" page
• Return to the introductory page

  l

• Quit info

  q

Running my test script on your script

• If you want to run my text script on your Class Exercise script do the following
• Run ex03.sh on your script
  

  ~ghoffman/it244_test/ex03.sh

  The script will prompt you for your Unix username.