1. IT244 - Introduction to Linux / Unix Instructor: Bo Sheng

2. General Information Location and Time Office Hours Course web page
S-3-143, Mon & Wed, 4:00 ~ 5:15pm
Door code: *
Office Hours
Science Center, S-3-167, Mon & Wed, 2 ~ 4pm
TA office hours: TBD
Course web page

3. General Information Grading Policy 8~10 homework/project assignments
Mid-term and final exams
Homework (60%) + Mid-term (15%) + Final (25%)

4. General Information Course Content Exclude Chapter 7, 9, 16, 17
Linux/Unix commands and utilities
Shell (Bourne Shell)
File systems
Text editor (vim)
Scripting
Shell scripting, awk, sed, perl
Introductory level coverage

5. General Information Course Content Command-line interface (CLI)
No graphic user interface (GUI)

6. General Information Course Content University’s Policies
Hands-on practice (lab / home)
Lecturing style (slides + demo + practice)
Login to a dedicated server from any computer
Unix account and register for this course
University’s Policies
Plagiarism, Honor code
Emergency
Disability service

7. Overview of Linux/Unix
Why we learn Linux/Unix?

8. OS Platform Statistics (Web)

9. Web Server Survey
4.30% of Apache running on Windows servers

10. Top 500 Supercomputers http://top500.org/statistics/list/
OPERATING SYSTEM FAMILY
COUNT
SYSTEM SHARE (%)
RMAX (GFLOPS)
RPEAK (GFLOPS)
CORES
Linux
494
98.8
419,253,297
640,067,791
29,226,383
Unix 6
1.2
1,868,442
2,215,095
76,128

11. Overview of Linux/Unix
Why we learn Linux/Unix?
Job prospects
Proficiency with Linux/Unix
Basic knowledge of scripting
Basics for other courses

12. Overview of Linux/Unix
Why we learn Linux/Unix?
What is Linux/Unix?

13. Operating Systems System calls Resource management
e.g., open(), read()
Resource management
Hardware abstraction
User interface

14. History of Linux / Unix Timeline http://www.levenez.com/unix/
Milestones
1969: Unix starts at Bell Labs
1971: First edition of Unix
1977: 1BSD from Berkeley
1983: GNU project (GPL)
1991: Linux is announced
Hello everybody out there using minix -
I'm doing a (free) operating system (just a hobby, won't be big and professional like gnu) for 386(486) AT clones. …
PS. Yes – it's free of any minix code, …
—Linus Torvalds

15. Linux / Unix Operating Systems

16. Some Current Distributions

17. Overview of Linux/Unix
Why we learn Linux/Unix?
What is Linux/Unix?
Features of Linux/Unix
FREE (no charge, open source)
Multiuser
Multitasking
Multiplatform (portable)

18. Overview of Linux/Unix
Why we learn Linux/Unix?
What is Linux/Unix?
Features of Linux/Unix
Shell
Command interpreter
‘Programming language’ with no compilation
Bash, Tcsh, Dash, Zsh, …

19. Overview of Linux/Unix
Why we learn Linux/Unix?
What is Linux/Unix?
Features of Linux/Unix
Shell
File System Structure

20. Overview of Linux/Unix

21. Practice Login to lab computers
Download PuTTY client from the course web page

22. Unix Account If you haven’t got an account SSH (Secure Shell)
SSH (Secure Shell)
Use terminal (Linux/Mac OS clients)
Use other software tool (Windows client)
PuTTY

23. Unix Account
If you haven’t got an account

24. Unix Account
If you haven’t register you account with this class

25. Unix Account
If you haven’t register you account with this class

26. Login to Server Server (hostname): SSH (Secure Shell, no more telnet)
it244a.cs.umb.edu
it244b.cs.umb.edu
SSH (Secure Shell, no more telnet)
Use terminal (Linux/Mac OS clients)
Use other software tool (Windows client)

27. Login to Server Server (hostname): SSH (Secure Shell)
it244a.cs.umb.edu
it244b.cs.umb.edu
SSH (Secure Shell)
Use terminal (Linux/Mac OS clients)
Use other software tool (Windows client)
PuTTY
Instructions on course web page

28. Login to Server (Windows)
PuTTY

29. Login to Server (Windows)
PuTTY

30. Login to Server SSH (Secure Shell)
Use a terminal (Linux/Mac OS clients)
ssh
ssh –l username hostname
e.g.,
ssh
ssh –l shengbo it244a.cs.umb.edu

31. Login to Server (Linux / Mac)
Terminal

32. Login to Server (Linux / Mac)
Terminal