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Bash Scripting: Learn Shell Scripting
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Course Goals
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Bash Aliases
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Shell and Scripts
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Creating Your First Script and Changing the PATH
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The Bash Shebang
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Comments in Bash
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Running Scripts
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Variables in Bash
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Variable Expansion and Quoting
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Environment and Shell Local Variables
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Getting User Input
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Positional Parameters
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Project: How to Protect Yourself from Hackers
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Special Parameters
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$@ vs. $*
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Intro to Expansions
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Brace Expansion: String Lists
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Brace Expansions: Sequence Lists
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Project: Brace Expansion
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Exercise: Imposter Syndrome
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Tilde, Parameter and Variable Expansions
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Command Substitution
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Arithmetic Expansion
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Process Substitution
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Word Splitting
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Filename Expansion (Globbing)
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Intro to Shell Operation
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Tokenization
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Command Identification
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Shell Expansions
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Quote Removal
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Redirections: Stdin and Stdout Redirections
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Stderr Redirection
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Full Recap: Hands-on Example
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If, Elif and Else Statements
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Arithmetic Comparisons
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Multiple Condition Tests and Nested if/then Statements
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String Comparisons (Part 1)
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String Comparisons (Part 2)
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Project: Testing Network Connections
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The Case Statement
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Menus in Bash (The Select Statement)
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Project: System Administration Script Using Menus
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List of Commands
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Running a DOS Attack Without root Access (ulimit)
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For Loops (Part 1)
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For Loops (Part 2)
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Project: Dropping a List of IP Addresses Using a For Loop
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While Loops (Part 1)
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While Loops (Part 2)
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Project: Dropping a List of IP Addresses Using While and Process Substitution
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Loops with Break
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Loops with Continue
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Intro to Bash Arrays
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Arrays in Depth
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Using the Readarray Command
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Iterating Over Arrays
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Project: Account Creation
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Intro to Bash Functions
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Function's Arguments
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Variable Scopes in Functions
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Installing Ubuntu in a VM
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Things To Do After Installing Ubuntu
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Running a Linux Server in the Cloud
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Securing SSH with Key Authentication
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The Basics of VIM Text Editor
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The VIM Editor In-Depth - Part 1
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The VIM Editor In-Depth - Part 2
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Task Automation and Scheduling Using Cron (crontab)
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Scheduling Tasks Using Anacron (anacron)
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Introduction to Netfilter and Iptables
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Chain Traversal in a Nutshell
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Iptables Basic Usage
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Iptables Options (Flags) - Part 1
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Iptables Options (Flags) - Part 2
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Where Do We Write Iptables Rules
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Setting the Default Policy
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Deleting the Firewall
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Filter by IP Address
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Filter by Port
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Intro to Stateful Firewalls (Connection Tracking)
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Implementing Stateful Firewalls and Iptables
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Filter by MAC Address
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Match by Date and Time
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The ACCEPT and DROP Targets
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The LOG Target
