Auspiow

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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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Intro to Cybersecurity

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Path Traversal 1

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Path Traversal 2

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Start Here

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Using the Terminal

Time of First Successful Submission: 2026-02-24 09:35:23

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-24 09:37:21

Using the GUI Desktop

Time of First Successful Submission: 2026-02-24 09:42:56

Pasting into the Desktop

Time of First Successful Submission: 2026-02-24 09:45:23

Restarting Challenges

Time of First Successful Submission: 2026-02-24 10:02:54

Challenge Programs

Time of First Successful Submission: 2026-02-28 09:47:00

The Flag File

Time of First Successful Submission: 2026-02-28 09:50:11

Using Privileged Mode

Time of First Successful Submission: 2026-02-28 09:53:44

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: 2026-02-28 10:05:45

Intro to Arguments

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Command History

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The Root

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Program and absolute paths

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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

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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

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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

Time of First Successful Submission: 2026-03-01 08:14:10

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

Time of First Successful Submission: 2026-03-01 10:21:54

Split-piping stderr and stdout

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Named pipes

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Printing Variables

Time of First Successful Submission: 2026-03-01 12:52:32

Setting Variables

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Multi-word Variables

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Exporting Variables

Time of First Successful Submission: 2026-03-01 13:18:40

Printing Exported Variables

Time of First Successful Submission: 2026-03-01 13:13:43

Storing Command Output

Time of First Successful Submission: 2026-03-01 13:15:04

Reading Input

Time of First Successful Submission: 2026-03-01 13:20:49

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: 2026-03-02 09:23:50

Groups and Files

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Fun With Groups Names

Time of First Successful Submission: 2026-03-02 09:34:12

Changing Permissions

Time of First Successful Submission: 2026-03-02 09:54:53

Executable Files

Time of First Successful Submission: 2026-03-02 09:57:26

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

Time of First Successful Submission: 2026-03-02 11:07:03

Your First Shell Script

Time of First Successful Submission: 2026-03-02 11:11:36

Redirecting Script Output

Time of First Successful Submission: 2026-03-02 11:18:30

Executable Shell Scripts

Time of First Successful Submission: 2026-03-02 11:25:22

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

Time of First Successful Submission: 2026-03-02 12:01:31

Launching Screen

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Detaching and Attaching

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Finding Sessions

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Switching Windows

Time of First Successful Submission: 2026-03-02 12:57:07

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-03-02 12:59:51

Switching Windows (tmux)

Time of First Successful Submission: 2026-03-02 13:08:14

The PATH Variable

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Setting PATH

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Finding Commands

Time of First Successful Submission: 2026-03-02 13:23:23

Adding Commands

Time of First Successful Submission: 2026-03-02 13:32:38

Hijacking Commands

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Bashrc Backdoor

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Sniffing Input

Time of First Successful Submission: 2026-03-02 14:07:43

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

Time of First Successful Submission: 2026-03-23 11:35:15

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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Disassembling Programs

Time of First Successful Submission: 2026-03-23 18:59:12

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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Popping Stack Values

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Examining Memory

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Examining Stack Pointers

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Cooperative Debugging

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Writing Output

Time of First Successful Submission: 2026-03-23 22:01:07

Chaining Syscalls

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Writing Strings

Time of First Successful Submission: 2026-03-23 22:03:59

Reading Data

Time of First Successful Submission: 2026-03-23 22:10:12

Opening Files

Time of First Successful Submission: 2026-03-24 14:16:47

Hardcoding the Filename

Time of First Successful Submission: 2026-03-24 14:36:26

Comparing Values

Time of First Successful Submission: 2026-03-26 04:57:01

Comparing Characters

Time of First Successful Submission: 2026-03-26 05:03:35

Conditional Control Flow

Time of First Successful Submission: 2026-03-26 05:11:56

Comparing Strings

Time of First Successful Submission: 2026-03-26 05:30:47

Reverse the Password

Time of First Successful Submission: 2026-03-26 06:54:21

Conditionals Without Conditionals

Time of First Successful Submission: 2026-03-26 08:36:40

Looping

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Reverse the Calculation

Time of First Successful Submission: 2026-03-28 10:39:49

Reverse the Reverse

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Dealing with Bitwise Operations

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Loops on Data

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set-register

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set-multiple-registers

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add-to-register

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linear-equation-registers

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integer-division

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modulo-operation

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set-upper-byte

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efficient-modulo

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byte-extraction

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bitwise-and

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check-even

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memory-read

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memory-write

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memory-increment

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byte-access

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memory-size-access

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little-endian-write

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memory-sum

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stack-subtraction

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swap-stack-values

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average-stack-values

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absolute-jump

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relative-jump

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jump-trampoline

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conditional-jump

Time of First Successful Submission: 2026-03-31 12:44:31

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-02-24 09:35:23

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-24 09:37:21

Using the GUI Desktop

Time of First Successful Submission: 2026-02-24 09:42:56

Pasting into the Desktop

Time of First Successful Submission: 2026-02-24 09:45:23

Connecting over SSH

Time of First Successful Submission: 2026-02-24 09:58:35

Restarting Challenges

Time of First Successful Submission: 2026-02-24 10:02:54

Getting Help

Time of First Successful Submission: 2026-02-24 10:05:52

Challenge Programs

Time of First Successful Submission: 2026-02-28 09:47:00

The Flag File

Time of First Successful Submission: 2026-02-28 09:50:11

Using Privileged Mode

Time of First Successful Submission: 2026-02-28 09:53:44

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-28 09:59:15

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-28 10:00:14