Selected Unix commands

  ls           List all files and directorys in current directory.
  ls -l        Do listing in long form, giving additional information
               such as file lengths, read/write/execute privileges.
  ls -a        List all files, including hidden files.
  cd name      Change directory to the indicated directory.
  cd           Change to the login directory
  cd ~         Change to the home directory (login directory)
  cp f1 f2     Copy file f1 to file f2
  clear        Clear the screen
  mv f1 f2     Move file f1 to file f2.  When in the same subdirectory,
               rename f1 as f2.
  pwd          Print working directory.
  logout       Logout of the c-shell window (not necessarily from the 
               terminal)
  chmod        Change the read/write/execute privileges of a file.  Type
               chmod or man chmod to see how to use the command.  
	       The latter gives much more detail.
  rm file      Delete the indicated file or files.
  more file    List the indicated file, one page at a time.
  cat file     List the indicated file.
  mkdir name   Create a subdirectory with the given name.
  rmdir name   Delete the indicated subdirectory [It must be empty].
  man command  Give help information for the given command.
  man -k keywd Give all commands referring to the given keyword.
  setenv       Set environment variables.
  printenv     Print all environment variables.
  ps -ef       List current running processes.
  kill -9      Used to kill current processes.
  alias        Used to define new command names or macros.
               To see the current names set using alias, simply
               type alias and a carriage return.
  gfortran     GNU Fortran 95 compiler
  nohup        No hang up.  This is used to run a process in background, 
               after logging out.
  &            Used in putting a process into background.
  gedit file   Invoke the gedit editor.
  nedit file   Invoke the nedit editor.
  ssh          Used to log into another account and/or computer.
  sftp         Used to transfer files between accounts and/or computers.
  maple        Used to invoke the symbolic math program MAPLE
  matlab       Used to invoke the numerical analysis program MATLAB 
  mathematica  Used to invoke Mathematica
  mozilla      Invoke the Mozilla reader to access the World Wide Web
  lp file      Print a Postscript file (to the default printer)