• rapid development cycle
• small and portable executable files
• direct access to Unix tool commands
• control structures, variables, etc.

• sllloooowww (interpreted, multiple processes)
• data structures weak
• some things you "just can't do"

1. Write the program

   $ vi alert

2. Make it executable

   $ chmod 755 alert

3. Run it

   $ ./alert

4. (Optional) Move it to your tools directory

   $ mv alert bin/ $ alert

• case:

  case word in
      pattern) commands ;;
      pattern) commands ;;
      pattern) commands ;;
      ...
  esac

• if:

  if command
  then
      true commands
  else
      false commands
  fi

• for:

  for var in wordlist
  do
      commands
  done
  

• shorter for:

  for var
  do
      commands
  done
  

• while:

  while command
  do
      commands
  done
  

• until:

  until command
  do
      commands
  done
  

$ less ~pas/pmecho $ less ~pas/menu $ less ~pas/fdcount

That's it! Assuming I made it this far! Thank you!