Other Useful C Shell Commands

• history
  displays the list of previously used commands.
  Type
  

  history
  

  to see last 100 commands used. For example, to repeat command 123 use:
  

  !123
  

  to repeat the previous command use:
  

  !!
  

  For other options see UNIX in a nutshell book.

• alias
  will assign a name to the command. For example, if one wants to use dir instead of ls then he/she must create an alias:
  

  alias dir ls # but please, do learn UNIX
  

• job control
  

  CTRL-Z
  

  stops the execution of the program
  

  jobs
  

  lists all running or stopped jobs

  kill ID
  

  terminates specific process ID

  Example:
  

  Suppose we have a program ./myprogram running. To stop it type
  

  CTRL-Z
  

  To see what programs are running or stopped type
  

  jobs
  

  If you will see
  

  $[$1$]$ myprogram stopped
  

  you can kill this process by
  

  kill %1

• finger users

  displays data about one or more users
  Example:
  finger youruserid
  finger cs241
  

  To change the information about yourself visible to everybody use:
  

  chfn
  

  and follow the instructions on the screen.

As mentioned above, the information can be viewed by anyone. Be thus sure you only include the kind of information everybody can know.

You may also include additional information stored in the file .plan in your home directory.
To create or change your .plan file type:
cd # this will switch into your home directory
vi .plan # opens the file
Hello (some message)

After saving the file try

finger youruserid

You will see the message: plan exists, but it is unreadable (on the screen) because the file .plan is not world readable. To change the permission type:

chmod a+r .plan

Where 'a' stands for "all" = user + group + other as explained earlier.