Class 1: Tuesday, September 8th

• Course Description
• This Course Requires Work
• Textbook
• Unix Account
• Course Work
• Software Needed for the Course
• Laptops
• Phones
• Attendance
• Recorded Class Meetings
• Course Documents
• Grading Policy
• Exams and Your Grade
• Late Work
• Email Notification
• Gradescope
• Diversity, Equity and Inclusion
• Accommodations for Disabilities
• Classroom Behavior
• Academic Honesty
• Honesty Expected In This Class
• What Happens If You Are Caught Cheating?
• Use of Artificial Intelligence Programs
• Class Discussion Area
• Class Assistant
• Making the Class Interesting
• Taking Notes
• Who Am I
• Office Hours
• Contacting Me
• First Class Exercise
• First Homework Assignment

Class 2: Thursday, September 10th

• Unix Account
• Your Home Directory
• Your Class Directory
• Help with Unix Account or Class Directory
• Connecting to pe15
• Operating Systems
• Components of the Operating System
• Unix
• Different Unix Releases
• GNU and the Free Software Foundation
• Linus Torvalds
• Linux Distributions
• Why is Linux So Popular?
• Ubuntu
• Shells
• Unix Commands
• Today's Class Exercise

Class 3: Tuesday, September 15th

• Do You Have Enough Time to Do the Work for This Course?
• Class Quizzes
• First Graded Quiz
• Home and it244 Directories
• Some Skills Only Come With Work
• Class Exercises
• Getting Help
• Describing a Problem
• Don't Use Screenshots in Piazza
• Login Failure
• The Command Line
• The Unix script Command
• The Editor Used in This Class
• The nano Text Editor
• Retrieving Your Last Command
• Correcting Mistakes on the Command Line
• Stopping a Running Program
• Using Options with Unix Commands
• Getting Help with Unix Commands
• The System Manual
• The info System
• Searching for a Keyword with apropos
• Getting Help from the Internet
• Using script in Homework 2

Class 4: Thursday, September 17th

• Make a Study Schedule
• First Graded Quiz
• Gradescope
• Use Flash Cards to Prepare for Graded Quizzes
• Always Check Your Work
• Recorded Class Meetings
• Special Characters
• Quoting and Escaping
• pwd - Show Your Current Directory
• cd - Change Directory
• ls - List the Contents of a Directory
• cat - Print the Contents of a File
• rm - Delete a File
• mkdir - Create a Directory
• rmdir - Delete a Directory
• cp - Copy Files
• mv - Move a File or Directory
• man Page Sections

Class 5: Tuesday, September 22nd

• Learn to Read Carefully
• Graded Quiz Today
• Late Penalty
• Do Not Email Me about Missing Assignments
• Importance of Exams
• Preparing for Exams
• Shell Scripts for Homework Assignments
• Scripts for Class Exercises
• Do Not Fall Behind in This Course
• Read the Homework Assignments Carefully
• Working with More than One Window
• Shell Scripts
• echo - Print Text to the Terminal
• hostname - Print the Name of Your Host Machine
• Pagers - View a File One Screen at a Time
• more
• less
• Pathname Completion
• grep - Finding Strings inside Files
• head - View the Top of a File
• tail - View the Bottom of a File
• sort - Print a File in Sorted Order

Class 6: Thursday, September 24th

• Attending Class
• Shell Scripts for Homework Assignments
• Scripts for Class Exercises
• Copying and Pasting at the Command Line
• A Space in the Wrong Place
• Finding Errors in a Script
• The Shell Prompt
• Pipes - Stringing Programs Together
• uniq - Eliminate Duplicate Lines
• diff - Differences between Files
• file - Show the File Type
• date - Get the Date and Time
• wc - Counting characters
• which - Finding a Program File
• whereis - Finding Files Used by a Program
• find - Search for Files Using Different Criteria
• who - See Users Logged On
• finger - Get information on Users

Class 7: Tuesday, September 29th

• Your Mental Health
• Collecting and Testing Assignments
• Notifying You About Missing Work
• Late Work
• Rules for Homework Assignments
• No Appointment Needed For Office Hours
• Checking Class Exercises
• An Easy Way to Create Homework Scripts
• Read the Specification
• Always Check Your Work
• Common Mistakes with Pipes
• Text File Conversion Programs
• Compressing Files with bzip2
• gzip - the GNU Compression Utility
• tar - Packaging Files for Transfer or Storage
• The Hierarchical Filesystem
• Unix Files and Directories
• Filenames
• Case Sensitivity
• Filename Extensions
• Current Directory
• Your Home Directory
• Navigating the Hierarchical File Systems

Class 8: Thursday, October 1st

• Keep Each Study Period Short
• Be Sure You Know Where You Are
• Finding Errors in Homework Scripts
• Hidden Filenames
• Startup Files
• The . and . . Directory Entries
• Pathnames
• Absolute Pathnames
• Tilde, ~, in Pathnames
• Relative Pathnames
• Relative Pathnames in Your Current Directory
• Relative Pathnames in a Subdirectory
• Relative Pathnames above the Current Directory
• Relative Pathnames Neither above Nor below the Current Directory
• Standard Directories
• Your Home Directory versus /home
• The Two Uses of /
• The Two Special Uses of .

Class 9: Tuesday, October 6th

• If You Fall Behind See Me
• Mistakes That Make Your Scripts Hard to Score
• Testing Your Class Exercises
• A Subtle Pathname Problem
• A Trick When Creating a Long Pathname
• Access Permissions
• Groups
• Viewing Access Permissions
• chmod
• Using chmod with Numeric Arguments
• chmod Practice

Class 10: Thursday, October 8th

• Read the Material Before Class
• Using Pathnames
• Using a Pathname to Run a Script
• Practice with Access Permissions
• The root Account
• Directory Access Permissions
• Links
• The Two Types of Links
• ln
• Removing a Link
• Setuid and Setgid Permissions
• Setting Setuid and Setgid with chmod

Class 11: Tuesday, October 13th

• Getting Your First IT Job
• Keep Learning
• Keep In Contact
• Never Use . . in an Absolute Pathname
• Write Permissions on a Directory
• Using the ls Command
• The chmod Chant
• Using . When Copying a File
• Running a Unix Command
• Syntax of the Command Line
• Command Options
• Device Drivers
• tty
• The Unix tty Device Driver
• Parsing the Command Line
• The PATH System Variable
• Running a Program in the Current Directory
• Running the Command Entered on the Command Line
• Setgid Permission on Directories

Class 12: Thursday, October 15th

• Viewing Directory Permissions
• Using Computers More Efficiently
• Computers are Fast But People are Slow
• The Birth of Unix
• Data Streams
• Standard Input, Standard Output and Standard Error
• The Keyboard and Screen as Standard Input and Standard Output
• Redirection
• Redirecting Standard Output
• Redirecting Standard Input
• Redirecting Standard Output Can Destroy a File
• Adding Output to an Existing File
• /dev/null
• Tricks with cat and Redirection
• Devices
• Device Files
• ssh and Pseudo-terminals