ntxissacsc5

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
@NTXISSA #NTXISSACSC5
Getting Started - ping
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22. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
Getting Started - ifconfig
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23. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
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
@NTXISSA #NTXISSACSC5
More commands - last
• Last
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28. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands - sed
• sed
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29. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
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
@NTXISSA #NTXISSACSC5
More commands
• Putting the commands together
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32. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands
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33. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands
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34. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands
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35. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands
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36. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands
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37. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands
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38. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands
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39. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
More commands
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40. NTXISSA Cyber Security Conference – November 10-11, 2017
@NTXISSA #NTXISSACSC5
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
@NTXISSA #NTXISSACSC5
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Thank you