megacharizard

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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-05-28 03:23:41

Command Arguments

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Command History

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The Root Path

Time of First Successful Submission: 2026-05-30 21:30:40

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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Intro to Cybersecurity

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Path Traversal 1

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Path Traversal 2

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CMDi 1

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CMDi 2

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CMDi 3

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CMDi 4

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CMDi 5

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CMDi 6

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Authentication Bypass 1

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Authentication Bypass 2

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SQLi 1

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SQLi 2

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SQLi 3

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SQLi 4

Time of First Successful Submission: 2026-09-19 19:54:43

SQLi 5

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XSS 1

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XSS 2

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XSS 3

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XSS 4

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XSS 5

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XSS 6

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XSS 7

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CSRF 1

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CSRF 2

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CSRF 3

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CSRF 4

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CSRF 5

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Start Here

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Using the Terminal

Time of First Successful Submission: 2026-05-27 22:42:05

Using the VSCode Workspace

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Using the GUI Desktop

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Pasting into the Desktop

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Restarting Challenges

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Challenge Programs

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The Flag File

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Using Privileged Mode

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Persistent Home Directories - One

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Persistent Home Directories - Two

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Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-05-28 03:23:41

Intro to Arguments

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Command History

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The Root

Time of First Successful Submission: 2026-05-30 21:30:40

Program and absolute paths

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Position thy self

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Position elsewhere

Time of First Successful Submission: 2026-05-30 21:39:50

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: 2026-08-24 22:49:32

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: 2026-08-25 05:22:53

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

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Tab completion on commands

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Redirecting output

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Redirecting more output

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Appending output

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Redirecting errors

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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

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Process substitution for input

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Writing to multiple programs

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Split-piping stderr and stdout

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Named pipes

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Printing Variables

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Setting Variables

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Multi-word Variables

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Exporting Variables

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Printing Exported Variables

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Storing Command Output

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Reading Input

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Reading Files

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Translating characters

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Deleting characters

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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

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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

Time of First Successful Submission: 2026-08-28 03:37:51

Groups and Files

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Fun With Groups Names

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Changing Permissions

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Executable Files

Time of First Successful Submission: 2026-08-28 03:42:17

Permission Tweaking Practice

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Permissions Setting Practice

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The SUID Bit

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Chaining with Semicolons

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Building on Success

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Handling Failure

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Your First Shell Script

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Redirecting Script Output

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Executable Shell Scripts

Time of First Successful Submission: 2026-08-28 04:37:01

Understanding Shebangs

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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

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Launching Screen

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Detaching and Attaching

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Finding Sessions

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Switching Windows

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Detaching and Attaching (tmux)

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Switching Windows (tmux)

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The PATH Variable

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Setting PATH

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Finding Commands

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Adding Commands

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Hijacking Commands

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Bashrc Backdoor

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Sniffing Input

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Overshared Directories

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Tricky Linking

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Sniffing Process Arguments

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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 /

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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

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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)

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Encoding Negatives

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Binary and Hex Encoding

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More Hex

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Decoding Hex

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Mixed Conversions

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Disassembling Programs

Time of First Successful Submission: 2026-09-21 18:37:38

Tracing Syscalls

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Starting GDB

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Quitting GDB

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Starting Programs in GDB

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Disassembling in GDB

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Stepping Through Instructions

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Reading Register Values

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Setting Register Values

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Popping Stack Values

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Examining Memory

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Examining Stack Pointers

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Cooperative Debugging

Time of First Successful Submission: 2026-09-21 19:19:17

Running with Arguments

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Redirecting Input in GDB

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Writing Output

Time of First Successful Submission: 2026-09-27 04:29:22

Chaining Syscalls

Time of First Successful Submission: 2026-09-27 04:31:55

Writing Strings

Time of First Successful Submission: 2026-09-27 04:33:22

Reading Data

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Reading Exactly

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Opening Files

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Hardcoding the Filename

Time of First Successful Submission: 2026-09-27 05:00:05

RIP-Relative Strings

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Comparing Values

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Comparing Characters

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Conditional Control Flow

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Comparing Strings

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Reverse the Password

Time of First Successful Submission: 2026-09-27 06:07:27

Conditionals Without Conditionals

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Recognizing Loops

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Writing Loops

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Writing From a Shared Library

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Returning a Value

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Calling Through a Pointer

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Calling Through a Pointer with an Argument

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Saving Caller-Saved Registers

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Saving Callee-Saved Registers

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Sign Extension

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Little-Endian Bytes

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Qword by Qword

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Dword by Dword

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Word by Word

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Byte by Byte

Time of First Successful Submission: 2026-09-30 17:49:03

Cracking a Struct

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Scrambled Struct

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Reverse the Calculation

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Reverse the Reverse

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Dealing with Bitwise Operations

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Even or Odd

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Masking Bits

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Lowercase a String

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Uppercase a String

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Swap Case

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Shifting Left

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Shifting Right

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Loops on Data

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Reaching Into the Caller's Frame

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Loading Stale Stack Data

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Stealing Stale Stack Data

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Reserving Your Own Frame

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Using Your Own Frame

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Environment Variables on the Stack

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Aligning the Stack Through the Environment

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Aligning the Stack Through GDB

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Aligning the Stack Through GDB, Generalized

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A Single Digit

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Two Digits

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String to Integer

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Negative Numbers

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Where the Number Ends

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A Whole Program

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A Single Digit, Back to Text

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Divide and Remainder

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Drop the Leading Zero

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Integer to String

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Negative Numbers, Back to Text

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Sum Them All

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Addition

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Subtraction

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Multiplication

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Bitwise Operators

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Unary Operators

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Literal Output

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Newline Escapes

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Escaped Syntax

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Decimal Markers

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Multiple Decimal Markers

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String Markers

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Hex Byte Escapes

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Debugging Programs

Time of First Successful Submission: 2026-10-02 23:04:40

Inspecting Registers

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Examining Memory

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Setting Breakpoints

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GDB Scripting

Time of First Successful Submission: 2026-10-02 23:59:51

Modifying Data

Time of First Successful Submission: 2026-10-03 02:25:25

Modifying Execution

Time of First Successful Submission: 2026-10-03 03:26:15

Broken Functions

Time of First Successful Submission: 2026-10-03 03:29:16

Exit

Time of First Successful Submission: 2026-10-03 04:18:29

Socket

Time of First Successful Submission: 2026-10-03 04:32:20

Bind

Time of First Successful Submission: 2026-10-03 04:40:09

Listen

Time of First Successful Submission: 2026-10-03 05:38:07

Accept

Time of First Successful Submission: 2026-10-03 05:40:49

Static Response

Time of First Successful Submission: 2026-10-03 05:46:39

Dynamic Response

Time of First Successful Submission: 2026-10-03 06:06:04

Iterative GET Server

Time of First Successful Submission: 2026-10-03 06:08:09

Concurrent GET Server

Time of First Successful Submission: 2026-10-03 06:12:00

Concurrent POST Server

Time of First Successful Submission: 2026-10-03 06:23:33

Web Server

Time of First Successful Submission: 2026-10-03 06:24:34

Playing With Programs

65 / 116 5183 / 26582

What's the password?

Time of First Successful Submission: 2026-08-31 22:55:53

... and again!

Time of First Successful Submission: 2026-08-31 23:00:43

Newline Troubles

Time of First Successful Submission: 2026-08-31 23:09:32

Reasoning about files

Time of First Successful Submission: 2026-08-31 23:16:56

Specifying Filenames

Time of First Successful Submission: 2026-08-31 23:22:14

Binary and Hex Encoding

Time of First Successful Submission: 2026-08-31 23:27:01

More Hex

Time of First Successful Submission: 2026-08-31 23:29:19

Decoding Hex

Time of First Successful Submission: 2026-08-31 23:40:42

Decoding Practice

Time of First Successful Submission: 2026-09-01 04:40:33

Encoding Practice

Time of First Successful Submission: 2026-09-01 04:45:21

Hex-encoding ASCII

Time of First Successful Submission: 2026-09-01 04:51:18

Nested Encoding

Time of First Successful Submission: 2026-09-01 05:01:59

Hex-encoding UTF-8

Time of First Successful Submission: 2026-09-01 05:08:22

UTF Mixups

Time of First Successful Submission: 2026-09-01 05:11:48

Modifying Encoded Data

Time of First Successful Submission: 2026-09-01 05:16:52

Decoding Base64

Time of First Successful Submission: 2026-09-01 05:19:34

Encoding Base64

Time of First Successful Submission: 2026-09-01 05:21:24

Dealing with Obfuscation

Time of First Successful Submission: 2026-09-01 05:25:28

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-09-01 05:30:56

Your First HTTP Request

Time of First Successful Submission: 2026-09-01 05:33:06

Reading Flask

Time of First Successful Submission: 2026-09-01 05:38:04

Commented Data

Time of First Successful Submission: 2026-09-01 05:41:00

HTTP Metadata

Time of First Successful Submission: 2026-09-01 05:45:23

HTTP (netcat)

Time of First Successful Submission: 2026-09-01 05:50:33

HTTP Paths (netcat)

Time of First Successful Submission: 2026-09-01 05:53:14

HTTP (curl)

Time of First Successful Submission: 2026-09-01 05:55:25

HTTP (python)

Time of First Successful Submission: 2026-09-01 05:58:07

HTTP Host Header (python)

Time of First Successful Submission: 2026-09-01 06:18:07

HTTP Host Header (curl)

Time of First Successful Submission: 2026-09-01 06:29:28

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-09-01 06:32:44

URL Encoding (netcat)

Time of First Successful Submission: 2026-09-01 06:36:41

HTTP GET Parameters

Time of First Successful Submission: 2026-09-01 06:39:34

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-09-02 01:56:09

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-09-03 18:23:37

HTTP Forms

Time of First Successful Submission: 2026-09-03 18:27:20

HTTP Forms (curl)

Time of First Successful Submission: 2026-09-03 18:30:03

HTTP Forms (netcat)

Time of First Successful Submission: 2026-09-03 18:36:06

HTTP Forms (python)

Time of First Successful Submission: 2026-09-03 18:45:12

HTTP Forms Without Forms

Time of First Successful Submission: 2026-09-03 19:02:21

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-09-04 15:03:04

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-09-04 15:10:47

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-09-04 17:32:35

HTTP Redirects (curl)

Time of First Successful Submission: 2026-09-04 17:34:57

HTTP Redirects (python)

Time of First Successful Submission: 2026-09-04 17:36:56

HTTP Cookies (curl)

Time of First Successful Submission: 2026-09-04 17:40:36

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-09-04 17:55:42

HTTP Cookies (python)

Time of First Successful Submission: 2026-09-05 00:43:18

Server State (python)

Time of First Successful Submission: 2026-09-05 00:50:27

Listening Web

Time of First Successful Submission: 2026-09-05 01:56:56

Speaking Redirects

Time of First Successful Submission: 2026-09-05 14:43:18

JavaScript Redirects

Time of First Successful Submission: 2026-09-05 14:49:26

Including JavaScript

Time of First Successful Submission: 2026-09-05 14:57:33

HTTP (javascript)

Time of First Successful Submission: 2026-09-05 15:04:49

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-09-05 15:12:33

HTTP Forms (javascript)

Time of First Successful Submission: 2026-09-05 15:31:26

SQL Queries

Time of First Successful Submission: 2026-09-05 16:41:18

Filtering SQL

Time of First Successful Submission: 2026-09-05 16:45:04

Choosing Columns

Time of First Successful Submission: 2026-09-05 16:52:55

Exclusionary Filtering

Time of First Successful Submission: 2026-09-05 16:59:58

Filtering Strings

Time of First Successful Submission: 2026-09-05 17:15:35

Filtering on Expressions

Time of First Successful Submission: 2026-09-05 17:23:47

SELECTing Expressions

Time of First Successful Submission: 2026-09-05 17:37:36

Composite Conditions

Time of First Successful Submission: 2026-09-05 17:41:09

Reaching Your LIMITs

Time of First Successful Submission: 2026-09-05 17:46:05

Querying Metadata

Time of First Successful Submission: 2026-09-05 17:51:50

DSU Cyber Camps

12 / 104 3219 / 68894

Using the Terminal

Time of First Successful Submission: 2026-05-27 22:42:05

Using the VSCode Workspace

Time of First Successful Submission: 2026-05-27 23:21:13

Using the GUI Desktop

Time of First Successful Submission: 2026-05-27 23:23:31

Pasting into the Desktop

Time of First Successful Submission: 2026-05-27 23:25:28

Connecting over SSH

Time of First Successful Submission: 2026-05-28 03:00:25

Restarting Challenges

Time of First Successful Submission: 2026-05-27 23:31:51

Getting Help

Time of First Successful Submission: 2026-05-27 23:56:15

Challenge Programs

Time of First Successful Submission: 2026-05-28 03:31:49

The Flag File

Time of First Successful Submission: 2026-05-28 03:33:57

Using Privileged Mode

Time of First Successful Submission: 2026-05-28 03:42:04

Persistent Home Directories - One

Time of First Successful Submission: 2026-05-28 04:01:52

Persistent Home Directories - Two

Time of First Successful Submission: 2026-05-30 20:54:49

GCA CTF

12 / 104 3219 / 68894

Using the Terminal

Time of First Successful Submission: 2026-05-27 22:42:05

Using the VSCode Workspace

Time of First Successful Submission: 2026-05-27 23:21:13

Using the GUI Desktop

Time of First Successful Submission: 2026-05-27 23:23:31

Pasting into the Desktop

Time of First Successful Submission: 2026-05-27 23:25:28

Connecting over SSH

Time of First Successful Submission: 2026-05-28 03:00:25

Restarting Challenges

Time of First Successful Submission: 2026-05-27 23:31:51

Getting Help

Time of First Successful Submission: 2026-05-27 23:56:15

Challenge Programs

Time of First Successful Submission: 2026-05-28 03:31:49

The Flag File

Time of First Successful Submission: 2026-05-28 03:33:57

Using Privileged Mode

Time of First Successful Submission: 2026-05-28 03:42:04

Persistent Home Directories - One

Time of First Successful Submission: 2026-05-28 04:01:52

Persistent Home Directories - Two

Time of First Successful Submission: 2026-05-30 20:54:49