Introduction To Unix
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The document provides an introduction to Unix and security policies. It discusses the history of Unix, common Unix commands and files, basic Unix concepts like permissions and processes. It also outlines steps for developing security policies, including getting management approval, writing clear policies, publishing them, allowing exceptions, and training users. The document recommends monitoring logs, restricting access and permissions, and references resources for further information.
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Easy to interface with C/ObjC/Java/Fortran
Easy to interface with C++ (via SWIG)
Great interactive environment
Python 'philosophy' emphasis readability, clarity and simplicity
The Interactive Interpreter
it is very easy to learn and understand.
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The document compares Java and C# programming languages. It discusses some key differences:
1. Syntax differences such as main method signatures, print statements, and array declarations are slightly different between the two languages.
2. Some concepts are modified in C# from Java, such as polymorphism requiring the virtual keyword, operator overloading restrictions, and switch statements allowing string cases.
3. C# introduces new concepts not in Java like enumerations, foreach loops, properties to encapsulate fields, pointers in unsafe contexts, and passing arguments by reference.
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Vangos Pterneas (http://twitter.com/Pterneas)
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Alex Tzanetopoulos (http://twitter.com/nerdtechnews)
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Here are the steps to complete the assignment:
1. Logged in as guest user
2. Present working directory is /home/guest
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In February, 2016 I had the privilege of working with employees of STARR Computers on a course to orient them to Linux. The course was delivered over a series of 90-120 minute sessions. It was designed so that
This is a compilation of the slides which were used. There were some other resources which were shared. There were practice exercises which were designed to reinforce some concepts.
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Here are the steps to complete the assignment:
1. Login as guest user (password is guest)
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Introduction To Unix
- 1. Introduction to Unix and Security Policies Sandy Bacik Breakwater Security Associates [email_address]
- 7. man pages
- 8. /etc/passwd
- 10. pwck
- 11. passwd -sa
- 13. /etc/shadow
- 14. /etc/group
- 16. grpck
- 22. Look at some file lists
- 24. chmod permission encoding rwx 111 7 rw- 110 6 r-x 101 5 r-- 100 4 -wx 011 3 -w- 010 2 --x 001 1 --- 000 0 Perms Binary Octal
- 25. umask permission encoding --- 111 7 --x 110 6 -w- 101 5 -wx 100 4 r-- 011 3 r-x 010 2 rw- 001 1 rwx 000 0 Perms Binary Octal
- 26. What’s running – ps command
- 28. syslog.conf
- 29. syslog entries
- 30. messages file
- 40. Break anyone?
- 45. What about exceptions It is easier to write and control exceptions, than it is to write policies custom to situations. With exceptions, the ownership is on the auditors to reconcile policy differences.
- 46. Let’s look at the check list Upper management IT and middle management IT and individual departments DON’T forget user training
- 47. Let’s look at some policies Corporate Assets Acceptable Use Network Security
- 48. Reference Information Security Policies Made Easy, version 7, Charles Cresson Wood, www.baselinesoftware.com
- 49. Thank you