An Introduction to UNIX

Configuration files

1. UNIX allows users to configure the system to their own preferences. Look at the attached configuration files
   • The C-shell file .cshrc
   • The login file .login
   • The logout file .logout
   • The prompt file .prompt
2. To see the files on line (on toksrv):
   • login to your own account. Then type

    cd ~marlowe

• to change to my directory. Then type

    alias ls ls -lga

• to set up a useful alias for this session, Then type

    ls

• to list the files, and then

    more .cshrc.old

• to type that file, (and likewise for the other files)
• You may copy the file for your own use by

    cd

• to get back to your own directory

    cp ~marlowe/.cshrc.old

• to copy the file, (etc.)
• To write your own shell commands, you need to know
  • what shell you are in, and
  • what the syntax of shell commands is
  • click here for a discussion of C-shell programming
    • overview
    • variables
    • expressions
    • control

Glass tutorial

• Log on to your account on toksrv
• Run the tutorial from Glass, Chapter 2.
• Look at the vi editor .

Redirects and pipes

Lab exercise

1. What does the cc command do?
   • What does the -p flag do in cc?
2. What are the outputs of the wc command?
3. How many lines are there in my .cshrc file?
4. How many lines are there in the man page for cc?
   • Give at least two unix instructions which would find this out.