Bill Petersen gave a presentation on getting started with Linux in an hour at the NTXISSA Cyber Security Conference on November 10-11, 2017. He discussed why Linux is useful, especially for its free operating system and tools. He recommended several Linux distributions for different purposes and outlined how to install Linux in a virtual machine or on physical hardware. Petersen then demonstrated many basic Linux commands and how to combine them to accomplish tasks. He encouraged attendees to continue learning about Linux on their own through online resources and contacting him directly for more training opportunities.

1. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Linux in an Hour
Bill Petersen
Principal Information Security Analyst
Heartland, a Global Payments Company
November 10, 2017

2. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Who am I?
• Bill Petersen
• Worked with Linux since 1992
• Built and Secured Internet servers
• Vulnerability and Penetration tester
• In my spare time, I love to camp, travel, sail,
bike, hike, read, shoot, and play with Linux
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3. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Linux in an Hour
• Why Linux
• Which Linux distribution
• How to get started
• Commands
• You can’t teach me everything in 1 hour?
• Where to go for more information
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4. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Why Linux?
• IT’s FREE
• Free OS
• Free Compilers
• Free servers (web, email, database, LDAP, high
availability)
• Free documentation (LOTS OF
DOCUMENTATION)
• Helpful people
• A LOT OF FREE TOOLS and APPLICATIONS
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5. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Which Linux Distribution
• Beginner / Learning: Kali, Kubuntu, Fedora
• Home banking: Mint
• Information Security / Hacking: Kali
• Server (free): Centos
• Server (supported): Red Hat Enterprise Linux
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6. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
How to get started
• Download the ISO
• Download VMware or Virtual Box
• Install and play
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7. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
How to get started
• Download the ISO
• Download tool to write image
For instance –
Fedora Media Writer
Win32 Disk Imager
• Boot the USB stick
• Play
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8. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
How to get started
• Like what you see?
• Insert the USB drive in an old computer
• Install from the USB to the hard drive
• Play and Play
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9. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
User Interface
• There are the usual GUI interfaces
• The power of Linux is the:
• Tools
• Transparency
• Ability to Tune the system
• Control – tools, processes, everything
• EVERYTHING IS TREATED LIKE A FILE
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10. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
User Interfaces
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11. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started – Basic Commands
• ls - List a directory
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12. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started – Basic Commands
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• ls
• cat
• more
• nano
• ping
• ssh
• ifconfig
• netstat
• ps
• ls; ls –l; ls –altr; ls –ld; ls -lR
• cat somefile
• more somefile
• nano somefile
• ping 4.2.2.1
• ssh someplace.ufo.com
• Ifconfig -a
• netstat -an
• ps -eaf; ps -aux

13. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started – List Directory
• ls
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14. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started – List Directory
• ls -l
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15. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started – List Directory
• ls -l
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16. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started – List Directory
• ls -altr
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17. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started – List Directory
• ls -lR
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18. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started - cat
• cat /etc/passwd
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19. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started - more
• more ChickenSoupForTheSoul.txt
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20. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started - nano
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21. NTXISSA Cyber Security Conference – November 10-11, 2017
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Getting Started - ping
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22. NTXISSA Cyber Security Conference – November 10-11, 2017
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Getting Started - ifconfig
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23. NTXISSA Cyber Security Conference – November 10-11, 2017
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Getting Started - netstat
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24. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started - ps
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25. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More Commands
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• who
• last
• sed
• awk
• grep
• sort
• uniq
• wc
• Who is logged in (who –u; who –b)
• List of users who have logged in
• Stream editor (sed –e ‘s/son/sen/g’)
• Text processing tool
• Regular expression seach
• Sort input
• Remove duplicates from input
• Word or letter count

26. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More Commands - who
• who
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27. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands - last
• Last
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28. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands - sed
• sed
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29. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands - awk
• Awk
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30. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands - grep
• grep
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31. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
• Putting the commands together
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32. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
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33. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
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34. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
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35. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
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36. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
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37. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
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38. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
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39. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
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40. NTXISSA Cyber Security Conference – November 10-11, 2017
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More commands
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• There is so much more that we could cover

41. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More Information
• Linux.org
• Redhat.com
• Fedoraproject.org
• Kali.org
• Raspberrypi.org
• Hackersforcharity.org
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42. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Linux in an Hour
• Linux System Requirements:
• Any INTEL or AMD processor (2GHZ dual core
processor or better recommended)
• 1GB RAM (2GB recommended)
• 15GB of disk (20GB recommended by Mint, 40
GB recommended by ME)
• DVD drive or USB port to boot a live version or
install to disk
• 1024 x 768 resolution monitor
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43. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Linux Distributions
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44. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Linux Distributions
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• Ubuntu: https://Ubuntu.com
• Elementary: https://elementary.io
• Fedora: https://getfedora.org
• Kali: https://kali.org

45. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Questions?
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46. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
There is always a test!
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47. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
What did you learn?
• What did you learn today?
• What are you going to do about it?
• Do you have questions?
• If you don’t, you probably weren’t listening
• FIND the answer to those questions!
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48. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Linux in an Hour
• Bill Petersen
• Principal Information Security Analyst at Heartland, a
Global Payments company
• Bamsco.Consulting@gmail.com
• 972-523-9425
• Want to learn more? Call or email me. We can setup
one-on-one or team trainings. 8 hours to 8 days! I can
customize a class for you.
• Linux is fun. Learn it. Share it.
• Grow your knowledge and skills!
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49. NTXISSA Cyber Security Conference – November 10-11, 2017
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Thank you