1. Unix Environment Basics CSCI-1302
Lakshmish Ramaswamy

2. Organizational Matters
Tutor – Tapan Patwardhan
Office Hours: Tue & Th 2:15pm-4:15pm & Wed 1:00pm-3:30pm; CS Lounge (Tentative)
TA – TBA
Rule – Subject line should start with CSCI 1302:
Always CC me

3. Getting Account on Atlas
All the assignments to be done on Atlas
You will all receive accounts on Atlas
Go to system CS support today afternoon/tomorrow to collect your account information

4. Accessing Atlas from Windows
Download and install “putty”
Available freely at
Open putty client and login using your username and password

5. Directory Structure in Unix
Files organized into directories
Hierarchical structure
You will be logging on to your “home” directory

6. File & Directory Operations in Unix
“mkdir”
“cd”
“ls”
“rm”
“mv”
“cat”

7. Access Rights in Unix Read Write Execute Permission for self
Permission for group members
Permissions for everyone
“chmod” command

8. Path Variable Executables kept in various places (directories)
path variable tells the OS where to search for commands you type in
Incorrect/incomplete path results in “command not found”
Use “echo” command to see what your variable is set to

9. Setting the Path You will be using java 1.5
Java is located at /usr/local/jdk1.5.0/bin
Use the following command to set your path variable correctly
set path=( /usr/local/jdk1.5.0/bin /usr/local/java/j2sdk1.4.1/bin /opt/sfw/bin /usr/local/bin /usr/bin /opt/sfw/bin .)
Include the command in your .cshrc file
source .cshrc
java –version should show “1.5.0”

10. Editors in Unix
pico
vim
emacs

11. Compiling and executing java programs
javac firstprogram.java
java firstprogram
First assignment