Unix II

Tom Kelliher, CS23

Feb. 14, 1997

Homework assignment:

Project 11, pg. 48 of Carrano. Due Feb. 21 in class. Do your work on keystone. Print your source file(s); they will be collected in class. Use script to record a run of the program. Use pine to e-mail me the script file containing the run. (Use ^R to read the file into the message text. Do not use ^J to attach the file to the message text.) Ignore the optional part.

Unix Philosophy

Why use a command line interface? Why use Unix?

1. The filesystem:
   1. Unified tree.

   2. Traversing the tree: ., .., ~, *, ?.

   3. Permissions on files. umask ( .cshrc) and file creation.

   4. Hidden files.

2. Shell variables (modify/put in .cshrc):
   1. prompt

      set prompt="\
      %m:%~\
      %% "
      

   2. autologout: set autologout=120

   3. noclobber: set noclobber

3. Aliases (modify/put in .cshrc):
   1. alias ? apropos

   2. alias cp 'cp -i'

   3. alias e %emacs

   4. alias grep 'grep -i'

   5. alias lpr 'lpr -h'

   6. alias ls 'ls -F'

   7. alias ll 'ls -l'

   8. alias msgs 'msgs -p'

   9. alias mv 'mv -i'

   10. alias rm 'rm -i'

4. Environment variables (modify/put in .login)
   1. setenv BLOCKSIZE 1K

   2. setenv LESS "-ceiMswx3"

   3. setenv PAGER less

   4. setenv PRINTER ljg35

   5. setenv XRSH_AUTH_TYPE xauth

Common Activities

1. Copying files.

2. Moving/Renaming files.

3. Changing permissions on files.

4. Removing files.

5. Printing files.

6. Creating/Removing directories.

7. Communicating: e-mail, messages, talk. ``Netiquette.''

8. Personal information: personal home page, .plan and finger.

9. Seeing who's on the system.

10. Running the C++ compiler.

11. Running a program.