1. CSE4251 The Unix Programming Environment
Spring 2015
Instructor: Mai Zheng

2. About the Class Level and Credits: U1
 Entry-level introduction to Unix environment
interactively use shell (command line interface & basic commands)
efficiently use shell (bash scripting , grep, sed, awk, etc.)
edit your programs (vim/emacs)
compile your programs (makefile)
version-control your programs (git)
visualize your data/results professionally (gnuplot)
others
Level and Credits: U1

3. About the Class No textbook required Grading
Satisfactory/Unsatisfactory
5 labs
100 points total (20 points each)
70 points required to pass
Late penalties: 1 day = 10%, 2 days= 25%, 3 days = 50%, > 3 days = 100% 
More info.

4. About the Instructor Mai Zheng Office hours & location More info.
Ph.D. candidate in CSE department
Research area: Systems
Office hours & location
Monday 4:00 pm - 5:00 pm,  or by appointment
Bolz Hall 109
More info.

5. About You Name, grade, department Unix experience
your strongest programming language? on which OS?
used vim/emacs?
used makefile?
Why do you choose this class

6. Outline Brief introduction of the class, instructor, and yourself
Brief introduction of Unix
What is Unix?
Why Unix?
What is shell and why bash?
Get ready for your Unix journey

7. What is Unix Was an operating system
Originally developed by Bell Labs around 1970
epoch time: number of seconds elapsed since 00:00:00 (UTC), Thursday, 1 January 1970.
Ancestor of many modern operating systems
Linux (Ubuntu, Red Hat, Debian, Android, etc. ), Mac OS, FreeBSD, Solaris, etc.
One of the Creators of UNIX,  Dennis Ritchie , is the creator of C

8. What is Unix Was an operating system Is an OS family/specification
Originally developed by Bell Labs around 1970
epoch time: number of seconds elapsed since 00:00:00 (UTC), Thursday, 1 January 1970.
Ancestor of many modern operating systems
Linux (Ubuntu, Red Hat, Debian, Android, etc. ), Mac OS, FreeBSD, Solaris, etc.
Is an OS family/specification
Not a single OS named “Unix”
but OSes could earn “UNIX certification”
Many “Unix-like” OSes
Including most popular modern OSes except for Windows

9. Why Unix Powerful: designed for programmers
build new tools easily and efficiently
customize the user interface
string together a series of commands to create new functionality
create custom commands that do exactly what we want

10. Why Unix Powerful: designed for programmers
build new tools easily and efficiently
customize the user interface
string together a series of commands to create new functionality
create custom commands that do exactly what we want
Widely used in academia and industry
OSU CSE department
Google, HP Labs, VMWare, Amazon, etc.

11. Why Unix Powerful: designed for programmers
build new tools easily and efficiently
customize the user interface
string together a series of commands to create new functionality
create custom commands that do exactly what we want
Widely used in academia and industry
OSU CSE department
Google, HP Labs, VMWare, Amazon, etc.
Open-sourced descendants allow us to learn a lot
Linux, FreeBSD, Android, etc.
One of the Creators of UNIX,  Dennis Ritchie , is the creator of C

12. What is Shell
A command interpreter that turns the text that you type (at the command line) into actions
was the only interface to access an OS before the graphic-user-interface (GUI) was invented
essentially a process
user mode
kernel mode

13. What is Shell Two main flavors of Unix Shells
Bourne shell (or Standard Shell): sh, ksh, bash, zsh
Originally developed at Bell Labs
$ for command prompt by default
C shell : csh, tcsh
Originally developed at Berkley
% for command prompt by default

14. What is Shell Two main flavors of Unix Shells
Bourne shell (or Standard Shell): sh, ksh, bash, zsh
Originally developed at Bell Labs
$ for command prompt by default
C shell : csh, tcsh
Originally developed at Berkley
% for command prompt by default
To check your current shell
$ echo $SHELL

15. Why bash Bash: Bourne-again shell (for this course)
An enhancement for the original Bourne shell (sh)
Default shell on most Linux distributions

16. Why bash Bash: Bourne-again shell (for this course) Why Not C shell
An enhancement for the original Bourne shell (sh)
Default shell on most Linux distributions
Why Not C shell
Csh Programming Considered Harmful
Top Ten Reasons not to use the C shell Csh problems

17. Outline Brief introduction of the class, instructor, and yourself
Brief introduction of Unix
What is Unix?
Why Unix?
What is shell and why bash?
Get ready for your Unix journey

18. Get ready for your Unix journey
Connect to CSE Linux server with your CSE account
Linux: ssh
Windows: run PuTTY.exe
Copy files between server and your computer
Linux: scp somefile
Windows: run WinSCP.exe
What if I don’t have access to a Linux server?
Install Linux on your own machine
Install Linux on a virtual machine on your own machine
E.g., Install VirtualBox, then install Ubuntu in VirtualBox