Unix for Advanced Users

5. Navigating Effectively

• 5.1. Where is that @#$%^*& command?
  5.1.1. whereis
  5.1.2. which
• 5.2. Where is that file?
  5.2.1. whereis
  5.2.2. find
• 5.3. What's that command called? man -k
• 5.4. Who am I?
  5.4.1. whoami
  5.4.2. id
• 5.5. What tty am I on? tty
• 5.6. Who else is on? What are people doing?
  5.6.1. who
  5.6.2. w
• 5.7. When did I log in last? last
• 5.8. What was my login shell? What shell am I using now?
  5.8.1 echo $SHELL
  5.8.2 echo $shell
• 5.9. Which directory am I in? pwd
• 5.10. How do I remember where I was last?
  5.10.1 pushd and popd
  5.10.2 dirs
  5.10.3 cd -
• 5.11. What does the ASCII charset look like? man ascii