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Linux 101 Hacks can best be described as a study guide for beginning systems administrators ("Linux 101"). It focuses entirely on terminal use -- from using the command line to manage system processes, search and sort files, and make remote connections to using common text-based utilities (such as fdisk). Linux 101 Hacks doesn't contain information that couldn't be found elsewhere -- but it nicely presents common administrative tasks in a way that makes grasping the power (and subtle nuances) of a command easier to process in a practical sense than reading a man page would | LINUX 101 HACKS Practical Examples to Build a Strong Foundation in Linux Ramesh Natarajan WWW. thegeeks tuff com Linux 101 Hacks www.thegeekstuff.com Table of Contents Introduction. 7 Foreword. 8 Version. 8 Chapter 1 Powerful CD Command Hacks. 9 Hack 1. Use CDPATH to define the base directory for cd command . 9 Hack 2. Use cd alias to navigate up the directory effectively. 10 Hack 3. Perform mkdir and cd using a single command. 13 Hack 4. Use cd - to toggle between the last two directories. 14 Hack 5. Use dirs pushd and popd to manipulate directory stack. 14 Hack 6. Use shopt -s cdspell to automatically correct mistyped directory names on cd. 17 Chapter 2 Date Manipulation.18 Hack 7. Set System Date and Time. 18 Hack 8. Set Hardware Date and Time. 19 Hack 9. Display Current Date and Time in a Specific Format. 19 Hack 10. Display Past Date and Time.21 Hack 11. Display Future Date and Time.22 Chapter 3 SSH Client Commands.24 Hack 12. Identify SSH Client Version.24 Hack 13. Login to Remote Host using SSH .24 Hack 14. Debug SSH Client Session.26 Hack 15. Toggle SSH Session using SSH Escape Character.27 Hack 16. SSH Session Statistics using SSH Escape Character.29 Chapter 4 Essential Linux Commands.31 Hack 17. Grep Command.31 2 Linux 101 Hacks www.thegeekstuff.com Hack 18. Find Command.33 Hack 19. Suppress Standard Output and Error Message.35 Hack 20. Join Command.35 Hack 21. Change the Case.36 Hack 22. Xargs Command.37 Hack 23. Sort Command.38 Hack 24. Uniq Command.41 Hack 25. Cut Command.42 Hack 26. Stat Command.43 Hack 27. Diff Command.44 Hack 28. Display total connect time of users.45 Chapter 5 PS1 PS2 PS3 PS4 and PROMPT_COMMAND.47 Hack 29. PS1 - Default Interaction Prompt.47 Hack 30. PS2 - Continuation Interactive Prompt.48 Hack 31. PS3 - Prompt used by select inside shell script.49 Hack 32. PS4 - Used by set -x to prefix tracing output.50 Hack 33. PROMPT_COMMAND. 52 Chapter 6 Colorful and Functional Shell Prompt Using PS1 .53 Hack 34. Display username hostname and
