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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-03-11 08:18:16

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

Time of First Successful Submission: 2026-03-12 17:12:34

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

Time of First Successful Submission: 2026-03-13 15:03:42

Authentication Bypass 1

Time of First Successful Submission: 2026-03-13 15:15:50

Authentication Bypass 2

Time of First Successful Submission: 2026-03-20 13:15:21

SQLi 1

Time of First Successful Submission: 2026-03-20 13:39:23

SQLi 2

Time of First Successful Submission: 2026-03-20 13:49:16

SQLi 3

Time of First Successful Submission: 2026-03-20 14:11:17

SQLi 4

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SQLi 5

Time of First Successful Submission: 2026-03-20 15:01:59

XSS 1

Time of First Successful Submission: 2026-03-25 07:22:59

XSS 2

Time of First Successful Submission: 2026-03-25 10:51:55

Start Here

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Using the Terminal

Time of First Successful Submission: 2026-03-11 07:15:43

Using the VSCode Workspace

Time of First Successful Submission: 2026-03-11 07:18:40

Using the GUI Desktop

Time of First Successful Submission: 2026-03-11 07:20:10

Pasting into the Desktop

Time of First Successful Submission: 2026-03-11 07:21:28

Restarting Challenges

Time of First Successful Submission: 2026-03-11 07:38:36

Challenge Programs

Time of First Successful Submission: 2026-03-11 07:52:25

The Flag File

Time of First Successful Submission: 2026-03-11 07:55:00

Using Privileged Mode

Time of First Successful Submission: 2026-03-11 07:57:47

Persistent Home Directories - One

Time of First Successful Submission: 2026-03-11 08:05:11

Persistent Home Directories - Two

Time of First Successful Submission: 2026-03-11 08:06:07

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-03-11 08:18:16

Intro to Arguments

Time of First Successful Submission: 2026-03-11 08:18:49

Command History

Time of First Successful Submission: 2026-03-11 08:19:17

The Root

Time of First Successful Submission: 2026-03-11 08:35:42

Program and absolute paths

Time of First Successful Submission: 2026-03-11 08:36:15

Position thy self

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Position elsewhere

Time of First Successful Submission: 2026-03-11 08:44:37

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

Time of First Successful Submission: 2026-03-12 14:06:57

Learning Complex Usage

Time of First Successful Submission: 2026-03-12 14:10:17

Reading Manuals

Time of First Successful Submission: 2026-03-12 14:11:44

Searching Manuals

Time of First Successful Submission: 2026-03-12 14:13:39

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

Time of First Successful Submission: 2026-03-12 17:17:09

Redirecting input

Time of First Successful Submission: 2026-03-12 17:18:18

Grepping stored results

Time of First Successful Submission: 2026-03-12 17:19:28

Grepping live output

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Grepping errors

Time of First Successful Submission: 2026-03-12 17:21:42

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: 2026-03-12 17:30:27

Process substitution for input

Time of First Successful Submission: 2026-03-12 17:41:28

Writing to multiple programs

Time of First Successful Submission: 2026-03-12 17:46:57

Split-piping stderr and stdout

Time of First Successful Submission: 2026-03-12 17:50:30

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

Time of First Successful Submission: 2026-03-12 17:59:59

Printing Exported Variables

Time of First Successful Submission: 2026-03-12 18:00:26

Storing Command Output

Time of First Successful Submission: 2026-03-12 18:03:13

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

Time of First Successful Submission: 2026-03-11 15:10:30

Using sudo

Time of First Successful Submission: 2026-03-11 15:13:20

Changing File Ownership

Time of First Successful Submission: 2026-03-11 11:20:05

Groups and Files

Time of First Successful Submission: 2026-03-11 11:21:00

Fun With Groups Names

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

Changing Permissions

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

Executable Files

Time of First Successful Submission: 2026-03-11 11:27:03

Permission Tweaking Practice

Time of First Successful Submission: 2026-03-11 11:37:54

Permissions Setting Practice

Time of First Successful Submission: 2026-03-11 11:44:33

The SUID Bit

Time of First Successful Submission: 2026-03-11 11:48:59

Chaining with Semicolons

Time of First Successful Submission: 2026-03-12 18:40:04

Building on Success

Time of First Successful Submission: 2026-03-12 18:40:35

Handling Failure

Time of First Successful Submission: 2026-03-12 18:41:04

Your First Shell Script

Time of First Successful Submission: 2026-03-12 18:43:42

Redirecting Script Output

Time of First Successful Submission: 2026-03-12 18:45:15

Executable Shell Scripts

Time of First Successful Submission: 2026-03-12 18:47:23

Understanding Shebangs

Time of First Successful Submission: 2026-03-12 18:49:38

Scripting with Arguments

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Scripting with Conditionals

Time of First Successful Submission: 2026-03-12 18:54:24

Scripting with Default Cases

Time of First Successful Submission: 2026-03-12 18:55:09

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-03-12 18:57:29

Reading Shell Scripts

Time of First Successful Submission: 2026-03-12 18:58:14

Launching Screen

Time of First Successful Submission: 2026-03-12 18:58:56

Detaching and Attaching

Time of First Successful Submission: 2026-03-12 18:59:39

Finding Sessions

Time of First Successful Submission: 2026-03-12 19:00:59

Switching Windows

Time of First Successful Submission: 2026-03-12 19:01:28

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-03-12 19:02:12

Switching Windows (tmux)

Time of First Successful Submission: 2026-03-12 19:02:43

The PATH Variable

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Setting PATH

Time of First Successful Submission: 2026-03-12 19:04:53

Finding Commands

Time of First Successful Submission: 2026-03-12 19:05:44

Adding Commands

Time of First Successful Submission: 2026-03-12 19:07:28

Hijacking Commands

Time of First Successful Submission: 2026-03-12 19:08:25

Bashrc Backdoor

Time of First Successful Submission: 2026-03-12 19:11:12

Sniffing Input

Time of First Successful Submission: 2026-03-12 19:18:21

Overshared Directories

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Tricky Linking

Time of First Successful Submission: 2026-03-12 19:25:07

Sniffing Process Arguments

Time of First Successful Submission: 2026-03-12 19:28:06

Snooping on Configurations

Time of First Successful Submission: 2026-03-12 19:29:08

The Fork Bomb

Time of First Successful Submission: 2026-03-12 19:59:38

Disk-Space Doomsday

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rm -rf /

Time of First Successful Submission: 2026-03-12 19:33:09

Life after rm -rf /

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Finding meaning after rm -rf /

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Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-03-11 15:16:08

... and again!

Time of First Successful Submission: 2026-03-11 15:16:45

Newline Troubles

Time of First Successful Submission: 2026-03-11 15:18:47

Reasoning about files

Time of First Successful Submission: 2026-03-11 15:25:58

Specifying Filenames

Time of First Successful Submission: 2026-03-11 15:28:44

Binary and Hex Encoding

Time of First Successful Submission: 2026-03-11 15:36:10

More Hex

Time of First Successful Submission: 2026-03-11 15:40:46

Decoding Hex

Time of First Successful Submission: 2026-03-11 15:50:14

Decoding Practice

Time of First Successful Submission: 2026-03-11 16:13:07

Encoding Practice

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Hex-encoding ASCII

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Nested Encoding

Time of First Successful Submission: 2026-03-11 16:43:52

Hex-encoding UTF-8

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UTF Mixups

Time of First Successful Submission: 2026-03-11 16:59:30

Modifying Encoded Data

Time of First Successful Submission: 2026-03-11 17:13:29

Decoding Base64

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Encoding Base64

Time of First Successful Submission: 2026-03-11 17:27:37

Dealing with Obfuscation

Time of First Successful Submission: 2026-03-11 17:34:04

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-03-11 17:42:33

Your First HTTP Request

Time of First Successful Submission: 2026-03-11 09:38:36

Reading Flask

Time of First Successful Submission: 2026-03-11 09:43:10

Commented Data

Time of First Successful Submission: 2026-03-11 09:46:18

HTTP Metadata

Time of First Successful Submission: 2026-03-11 09:49:29

HTTP (netcat)

Time of First Successful Submission: 2026-03-11 10:04:18

HTTP Paths (netcat)

Time of First Successful Submission: 2026-03-11 10:06:35

HTTP (curl)

Time of First Successful Submission: 2026-03-11 10:09:47

HTTP (python)

Time of First Successful Submission: 2026-03-11 10:18:57

HTTP Host Header (python)

Time of First Successful Submission: 2026-03-11 10:51:20

HTTP Host Header (curl)

Time of First Successful Submission: 2026-03-11 17:48:27

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-03-11 17:52:11

URL Encoding (netcat)

Time of First Successful Submission: 2026-03-11 17:58:14

HTTP GET Parameters

Time of First Successful Submission: 2026-03-11 18:01:57

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-03-11 18:06:30

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-03-11 18:10:24

HTTP Forms

Time of First Successful Submission: 2026-03-11 18:11:58

HTTP Forms (curl)

Time of First Successful Submission: 2026-03-11 18:14:08

HTTP Forms (netcat)

Time of First Successful Submission: 2026-03-11 18:17:18

HTTP Forms (python)

Time of First Successful Submission: 2026-03-11 18:20:06

HTTP Forms Without Forms

Time of First Successful Submission: 2026-03-11 18:24:49

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-03-11 19:04:38

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-03-11 19:05:54

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-03-11 19:08:30

HTTP Redirects (curl)

Time of First Successful Submission: 2026-03-11 19:10:58

HTTP Redirects (python)

Time of First Successful Submission: 2026-03-11 19:12:21

HTTP Cookies (curl)

Time of First Successful Submission: 2026-03-11 19:17:19

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-03-11 19:21:35

HTTP Cookies (python)

Time of First Successful Submission: 2026-03-11 19:22:51

Server State (python)

Time of First Successful Submission: 2026-03-11 19:26:50

Listening Web

Time of First Successful Submission: 2026-03-11 19:37:40

Speaking Redirects

Time of First Successful Submission: 2026-03-11 19:44:32

JavaScript Redirects

Time of First Successful Submission: 2026-03-11 19:48:10

Including JavaScript

Time of First Successful Submission: 2026-03-11 19:53:36

HTTP (javascript)

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HTTP Get Parameters (javascript)

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HTTP Forms (javascript)

Time of First Successful Submission: 2026-03-11 19:59:07

Arizona CTF 2025

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Fiesty File

Time of First Successful Submission: 2026-03-14 08:53:05

No Limitations

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Content Injection

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Teacher Login

Time of First Successful Submission: 2026-03-12 14:40:27

Teacher Login 2

Time of First Successful Submission: 2026-03-12 14:57:11

Teacher Login 3

Time of First Successful Submission: 2026-03-12 15:00:19

Teacher Login 4

Time of First Successful Submission: 2026-03-12 15:02:39

Teacher Login 5

Time of First Successful Submission: 2026-03-12 15:07:51

Teacher Login 6

Time of First Successful Submission: 2026-03-12 15:09:59

Teacher Login 7

Time of First Successful Submission: 2026-03-12 15:13:01

Class Cancellation

Time of First Successful Submission: 2026-03-12 15:18:16

Class Cancellation 2

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Class Cancellation 3

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Defcon 33 Defcon Academy Dojo

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Banana

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Earth

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GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-03-11 07:15:43

Using the VSCode Workspace

Time of First Successful Submission: 2026-03-11 07:18:40

Using the GUI Desktop

Time of First Successful Submission: 2026-03-11 07:20:10

Pasting into the Desktop

Time of First Successful Submission: 2026-03-11 07:21:28

Connecting over SSH

Time of First Successful Submission: 2026-03-11 07:33:06

Restarting Challenges

Time of First Successful Submission: 2026-03-11 07:38:36

Getting Help

Time of First Successful Submission: 2026-03-11 07:49:57

Challenge Programs

Time of First Successful Submission: 2026-03-11 07:52:25

The Flag File

Time of First Successful Submission: 2026-03-11 07:55:00

Using Privileged Mode

Time of First Successful Submission: 2026-03-11 07:57:47

Persistent Home Directories - One

Time of First Successful Submission: 2026-03-11 08:05:11

Persistent Home Directories - Two

Time of First Successful Submission: 2026-03-11 08:06:07

Linux Lunacy

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Only Files

Time of First Successful Submission: 2026-03-14 08:53:05

Wild Directories

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Full Circus

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Wonky Stage

Time of First Successful Submission: 2026-03-14 10:23:44

Zipbombs are so Yesterday

Time of First Successful Submission: 2026-03-15 20:03:46

Mo Regex, Mo Problems

Time of First Successful Submission: 2026-03-15 20:35:46

Terminal, Do You Copy?

Time of First Successful Submission: 2026-03-15 20:53:39

If at first you don't succeed...

Time of First Successful Submission: 2026-03-18 19:41:27

I have a mouth...

Time of First Successful Submission: 2026-03-14 10:48:26

I have no mouth...

Time of First Successful Submission: 2026-03-15 13:38:40

What good is a phone call...

Time of First Successful Submission: 2026-03-15 20:00:43

Pwntools Tutorials

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Level 0.0

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Level 1.0

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Level 1.1

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Level 2.0

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Level 2.1

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Level 2.2

Time of First Successful Submission: 2026-03-18 08:51:32

Level 2.3

Time of First Successful Submission: 2026-03-18 08:56:34

Level 2.4

Time of First Successful Submission: 2026-03-18 09:02:33

Level 2.5

Time of First Successful Submission: 2026-03-18 09:04:34

Level 2.6

Time of First Successful Submission: 2026-03-18 09:06:26

Level 3.0

Time of First Successful Submission: 2026-03-18 09:08:10

Level 4.0

Time of First Successful Submission: 2026-03-18 09:14:54