Hands On Exercise - GNU Tools Part 2

Bash:

• Piping:
  re-implement ls *.txt:

  $ ls -l | grep ".txt"

  find all of the network ports opened by your account:

  $ lsof -i UDP -i TCP | grep duane

• Further Reading:
  Bash Guide for Beginners
  Advanced Bash-Scripting Guide
  Bash Programming - Introduction HOWTO