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LiveFire Labs' Popular UNIX Tips from the Past

UNIX/Linux Operating System Fundamentals

· Changing your Command Prompt (the PS1 shell variable)

· Other Prompt String Shell Variables (PS2, PS3, PS4)

· The Standard UNIX File Descriptors - Standard Input (stdin), Standard Output (stdout), and Standard Error (stderr)

· A Brief Introduction to Regular Expressions

· Eliminating Duplicate Lines - The uniq Command

· Searching the man pages for Keywords

· Capturing a Session's Input and Output - The script Command - Part I

· Capturing a Session's Input and Output - The script Command - Part II

· How to Include the Current/Working Directory in your Command Prompt (the PS1 shell variable)

The Korn Shell and UNIX Shell Scripting

· Creating a Menu Using Select

· Processing Shell Script Options with the getopts Command

· Combining UNIX Commands using && and ||

· Using $$ to Create Unique Filenames in UNIX or Linux

· Using set to Process Unknown/Varying Numbers of Fields

· Useful Shell Scripting Variables - Part I - PWD

· Useful Shell Scripting Variables - Part II - PATH

· Useful Shell Scripting Variables - Part III - IFS (Internal Field Separator)

· Useful Shell Scripting Variables - Part IV - RANDOM

· Useful Shell Scripting Variables - Part V - SECONDS

· Korn Shell Arrays - Assigning and Accessing Values - Part I

· Korn Shell Arrays - Array Operators - Part II

· Korn Shell Arrays - Getting Creative - Part III

· Pattern Matching - Substrings - Part I

· Pattern Matching - Substrings - Part II

· Managing Variable Attributes with typeset - Part I

· Managing Variable Attributes with typeset - Part II

· Managing Variable Attributes with typeset - Part III

· Subshells & Subshell Grouping - Part I

· Subshells & Subshell Grouping - Part II

· Subshells & Subshell Grouping - Part III

· Co-processes - Part I - Review of Foreground and Background Jobs

· Co-processes - Part II - Introduction

· Co-processes - Part III - Syntax and Simple Example

· Co-processes - Part IV

UNIX System Administration

· Tracking Down Disk Space "Hogs" - The du Command - Part I

· Tracking Down Disk Space "Hogs" - The du Command - Part II

· How to Execute a UNIX Command that will Continue Running Even After you Log Out - The nohup Command

· File Access Modes (Permissions) and umask

· Special Purpose Access Modes (Permissions) - Part I - SUID (set user ID)

· Special Purpose Access Modes (Permissions) - Part II - SGID (set group ID)

· Special Purpose Access Modes (Permissions) - Part III - The Sticky Bit

UNIX Tools

· Using the ping Command to Develop an Inexpensive UNIX Monitoring Solution

· A Brief Introduction to awk

· A Brief Introduction to sed


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