Thunderborb

🐧

Intro to Programming Languages

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Commands

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Command Arguments

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Command History

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The Root Path

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Absolute Paths

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Changing position

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Changing to an Absolute Path

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Relative Paths

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Cat

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Ls

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Ls All

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Find

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Piping Echo

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Piping Stdout

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Piping Stdin

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The Art of the Shell

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The Transient Path

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Ferocious Functionality

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The Surprising Swap

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Start Here

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Using the Terminal

Time of First Successful Submission: 2026-06-03 05:15:32

Using the VSCode Workspace

Time of First Successful Submission: 2026-06-03 05:16:33

Using the GUI Desktop

Time of First Successful Submission: 2026-06-03 05:17:40

Pasting into the Desktop

Time of First Successful Submission: 2026-06-03 05:18:51

Restarting Challenges

Time of First Successful Submission: 2026-06-03 05:10:12

Challenge Programs

Time of First Successful Submission: 2026-06-03 05:06:03

The Flag File

Time of First Successful Submission: 2026-06-03 05:07:35

Using Privileged Mode

Time of First Successful Submission: 2026-06-03 05:11:03

Persistent Home Directories - One

Time of First Successful Submission: 2026-06-03 05:12:58

Persistent Home Directories - Two

Time of First Successful Submission: 2026-06-03 05:13:23


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-06-03 05:22:02

Intro to Arguments

Time of First Successful Submission: 2026-06-03 05:22:22

Command History

Time of First Successful Submission: 2026-06-03 05:22:47

The Root

Time of First Successful Submission: 2026-06-03 05:24:23

Program and absolute paths

Time of First Successful Submission: 2026-06-03 05:24:52

Position thy self

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Position elsewhere

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implicit relative paths, from /

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explicit relative paths, from /

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implicit relative path

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home sweet home

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cat: not the pet, but the command!

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catting absolute paths

Time of First Successful Submission: 2026-06-03 06:22:53

more catting practice

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grepping for a needle in a haystack

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comparing files

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listing files

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touching files

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removing files

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moving files

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copying files

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hidden files

Time of First Successful Submission: 2026-06-03 06:28:15

An Epic Filesystem Quest

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making directories

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finding files

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linking files

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Learning From Documentation

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Learning Complex Usage

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Reading Manuals

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Searching Manuals

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Searching For Manuals

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Helpful Programs

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Help for Builtins

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Matching with *

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Matching with ?

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Matching with []

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Matching paths with []

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Multiple globs

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Mixing globs

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Exclusionary globbing

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Tab completion

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Multiple options for tab completion

Time of First Successful Submission: 2026-06-03 07:15:31

Tab completion on commands

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Redirecting output

Time of First Successful Submission: 2026-06-03 20:01:33

Redirecting more output

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Appending output

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Redirecting errors

Time of First Successful Submission: 2026-06-03 20:05:27

Redirecting input

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Grepping stored results

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Grepping live output

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Grepping errors

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Filtering with grep -v

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Filtering with sed

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Duplicating piped data with tee

Time of First Successful Submission: 2026-06-03 20:18:39

Process substitution for input

Time of First Successful Submission: 2026-06-03 20:21:22

Writing to multiple programs

Time of First Successful Submission: 2026-06-03 20:23:35

Split-piping stderr and stdout

Time of First Successful Submission: 2026-06-08 17:47:45

Named pipes

Time of First Successful Submission: 2026-06-08 17:56:22

Printing Variables

Time of First Successful Submission: 2026-06-08 17:57:06

Setting Variables

Time of First Successful Submission: 2026-06-08 17:57:25

Multi-word Variables

Time of First Successful Submission: 2026-06-08 17:57:49

Exporting Variables

Time of First Successful Submission: 2026-06-08 17:58:31

Printing Exported Variables

Time of First Successful Submission: 2026-06-08 17:59:02

Storing Command Output

Time of First Successful Submission: 2026-06-08 17:59:32

Reading Input

Time of First Successful Submission: 2026-06-08 18:01:11

Reading Files

Time of First Successful Submission: 2026-06-08 18:02:31

Translating characters

Time of First Successful Submission: 2026-06-08 18:03:25

Deleting characters

Time of First Successful Submission: 2026-06-08 18:03:53

Deleting newlines

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Extracting the first lines with head

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Extracting specific sections of text

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Sorting data

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Listing Processes

Time of First Successful Submission: 2026-06-08 18:15:00

Killing Processes

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Interrupting Processes

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Killing Misbehaving Processes

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Suspending Processes

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Resuming Processes

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Backgrounding Processes

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Foregrounding Processes

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Starting Backgrounded Processes

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Process Exit Codes

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Becoming root with su

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Other users with su

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Cracking passwords

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Using sudo

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Changing File Ownership

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Groups and Files

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Fun With Groups Names

Time of First Successful Submission: 2026-06-08 19:53:58

Changing Permissions

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Executable Files

Time of First Successful Submission: 2026-06-08 19:58:09

Permission Tweaking Practice

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Permissions Setting Practice

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The SUID Bit

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Chaining with Semicolons

Time of First Successful Submission: 2026-06-08 23:08:20

Building on Success

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Handling Failure

Time of First Successful Submission: 2026-06-08 23:09:19

Your First Shell Script

Time of First Successful Submission: 2026-06-08 23:10:31

Redirecting Script Output

Time of First Successful Submission: 2026-06-08 23:33:05

Executable Shell Scripts

Time of First Successful Submission: 2026-06-08 23:34:20

Understanding Shebangs

Time of First Successful Submission: 2026-06-08 23:35:17

Scripting with Arguments

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Scripting with Conditionals

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Scripting with Default Cases

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Scripting with Multiple Conditions

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Reading Shell Scripts

Time of First Successful Submission: 2026-06-08 23:43:12

Launching Screen

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Detaching and Attaching

Time of First Successful Submission: 2026-06-08 23:45:09

Finding Sessions

Time of First Successful Submission: 2026-06-08 23:46:11

Switching Windows

Time of First Successful Submission: 2026-06-08 23:46:47

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-06-08 23:48:07

Switching Windows (tmux)

Time of First Successful Submission: 2026-06-08 23:55:34

The PATH Variable

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Setting PATH

Time of First Successful Submission: 2026-06-09 00:04:50

Finding Commands

Time of First Successful Submission: 2026-06-09 00:05:30

Adding Commands

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Hijacking Commands

Time of First Successful Submission: 2026-06-09 01:10:22

Bashrc Backdoor

Time of First Successful Submission: 2026-06-09 01:11:58

Sniffing Input

Time of First Successful Submission: 2026-06-09 01:16:00

Overshared Directories

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Tricky Linking

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Sniffing Process Arguments

Time of First Successful Submission: 2026-06-09 01:56:15

Snooping on Configurations

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The Fork Bomb

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Disk-Space Doomsday

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rm -rf /

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Life after rm -rf /

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Finding meaning after rm -rf /

Time of First Successful Submission: 2026-06-09 02:12:12


Computing 101

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Your First Register

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Your First Syscall

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Exit Codes

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Building Executables

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Moving Between Registers

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Loading From Memory

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More Loading Practice

Time of First Successful Submission: 2026-06-09 05:12:31

Dereferencing Pointers

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Dereferencing Yourself

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Dereferencing with Offsets

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Stored Addresses

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Double Dereference

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The Stack

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Stack Offsets

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Program Arguments on the Stack

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Popping From the Stack

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Negative Numbers

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Negative Numbers (16-bit)

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Negative Numbers (32-bit)

Time of First Successful Submission: 2026-06-13 21:10:51


Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-06-09 02:44:43

... and again!

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Newline Troubles

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Reasoning about files

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Specifying Filenames

Time of First Successful Submission: 2026-06-09 05:41:47


Arizona CTF 2025

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Hijack Me!

Time of First Successful Submission: 2026-06-09 05:47:30


DSU Cyber Camps

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Using the Terminal

Time of First Successful Submission: 2026-06-03 05:15:32

Using the VSCode Workspace

Time of First Successful Submission: 2026-06-03 05:16:33

Using the GUI Desktop

Time of First Successful Submission: 2026-06-03 05:17:40

Pasting into the Desktop

Time of First Successful Submission: 2026-06-03 05:18:51

Restarting Challenges

Time of First Successful Submission: 2026-06-03 05:10:12

Challenge Programs

Time of First Successful Submission: 2026-06-03 05:06:03

The Flag File

Time of First Successful Submission: 2026-06-03 05:07:35

Using Privileged Mode

Time of First Successful Submission: 2026-06-03 05:11:03

Persistent Home Directories - One

Time of First Successful Submission: 2026-06-03 05:12:58

Persistent Home Directories - Two

Time of First Successful Submission: 2026-06-03 05:13:23


GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-06-03 05:15:32

Using the VSCode Workspace

Time of First Successful Submission: 2026-06-03 05:16:33

Using the GUI Desktop

Time of First Successful Submission: 2026-06-03 05:17:40

Pasting into the Desktop

Time of First Successful Submission: 2026-06-03 05:18:51

Restarting Challenges

Time of First Successful Submission: 2026-06-03 05:10:12

Challenge Programs

Time of First Successful Submission: 2026-06-03 05:06:03

The Flag File

Time of First Successful Submission: 2026-06-03 05:07:35

Using Privileged Mode

Time of First Successful Submission: 2026-06-03 05:11:03

Persistent Home Directories - One

Time of First Successful Submission: 2026-06-03 05:12:58

Persistent Home Directories - Two

Time of First Successful Submission: 2026-06-03 05:13:23