jayfly5463

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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-01-14 19:50:55

Command Arguments

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Command History

Time of First Successful Submission: 2026-01-14 21:50:54

The Root Path

Time of First Successful Submission: 2026-01-14 21:54:16

Absolute Paths

Time of First Successful Submission: 2026-01-14 21:56:29

Changing position

Time of First Successful Submission: 2026-01-14 22:01:06

Changing to an Absolute Path

Time of First Successful Submission: 2026-01-14 22:03:24

Relative Paths

Time of First Successful Submission: 2026-01-14 22:11:37

Cat

Time of First Successful Submission: 2026-01-14 22:40:54

Ls

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Ls All

Time of First Successful Submission: 2026-01-14 22:56:52

Find

Time of First Successful Submission: 2026-01-14 23:28:34

Piping Echo

Time of First Successful Submission: 2026-01-15 02:10:41

Piping Stdout

Time of First Successful Submission: 2026-01-15 02:12:07

Piping Stdin

Time of First Successful Submission: 2026-01-15 02:19:03

Intro to Cybersecurity

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Path Traversal 1

Time of First Successful Submission: 2026-02-03 14:51:28

Path Traversal 2

Time of First Successful Submission: 2026-02-05 03:53:22

CMDi 1

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CMDi 2

Time of First Successful Submission: 2026-02-05 03:57:56

CMDi 3

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CMDi 4

Time of First Successful Submission: 2026-02-05 04:43:43

CMDi 5

Time of First Successful Submission: 2026-02-05 04:48:36

Authentication Bypass 1

Time of First Successful Submission: 2026-02-05 04:52:47

Authentication Bypass 2

Time of First Successful Submission: 2026-02-05 04:55:12

SQLi 1

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SQLi 2

Time of First Successful Submission: 2026-02-05 15:06:00

SQLi 3

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SQLi 4

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SQLi 5

Time of First Successful Submission: 2026-02-05 18:51:47

XSS 1

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XSS 2

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XSS 3

Time of First Successful Submission: 2026-02-05 19:01:35

XSS 4

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XSS 5

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XSS 6

Time of First Successful Submission: 2026-02-05 19:17:55

XSS 7

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CSRF 1

Time of First Successful Submission: 2026-02-08 03:55:00

CSRF 2

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CSRF 3

Time of First Successful Submission: 2026-02-08 04:17:28

CSRF 4

Time of First Successful Submission: 2026-02-08 04:24:09

CSRF 5

Time of First Successful Submission: 2026-02-08 04:31:40

File Formats: Magic Numbers (Python)

Time of First Successful Submission: 2026-03-05 15:54:43

File Formats: Magic Numbers (C)

Time of First Successful Submission: 2026-03-05 16:12:14

File Formats: Magic Numbers (x86)

Time of First Successful Submission: 2026-03-05 16:18:00

Reading Endianness (Python)

Time of First Successful Submission: 2026-03-05 16:21:51

Reading Endianness (C)

Time of First Successful Submission: 2026-03-05 16:28:31

Reading Endianness (x86)

Time of First Successful Submission: 2026-03-05 16:47:15

Version Information (Python)

Time of First Successful Submission: 2026-03-06 14:36:03

Version Information (C)

Time of First Successful Submission: 2026-03-06 15:02:00

Version Information (x86)

Time of First Successful Submission: 2026-03-06 15:07:20

Metadata and Data (Python)

Time of First Successful Submission: 2026-03-06 15:37:58

Metadata and Data (C)

Time of First Successful Submission: 2026-03-06 15:41:56

Metadata and Data (x86)

Time of First Successful Submission: 2026-03-06 16:13:16

Input Restrictions (Python)

Time of First Successful Submission: 2026-03-06 16:24:52

Input Restrictions (C)

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Input Restrictions (x86)

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Behold the cIMG! (Python)

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Behold the cIMG! (C)

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Behold the cIMG! (x86)

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A Basic cIMG (Python)

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A Basic cIMG (C)

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A Basic cIMG (x86)

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Internal State Mini (C)

Time of First Successful Submission: 2026-03-11 13:27:53

Internal State Mini (x86)

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Internal State (C)

Time of First Successful Submission: 2026-03-11 22:24:47

Internal State (x86)

Time of First Successful Submission: 2026-03-12 03:56:11

File Formats: Directives (C)

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File Formats: Directives (x86)

Time of First Successful Submission: 2026-03-12 14:07:34

The Patch Directive

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Optimizing for Space

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Tweaking Images

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Storage and Retrieval

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Extracting Knowledge

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Advanced Sprites

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Accessing Resources

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Unsafe Animations

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Animations

Time of First Successful Submission: 2026-03-18 03:44:13

Interoperability: Patching Data

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Patching Code

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Patching Control Flow

Time of First Successful Submission: 2026-03-20 14:53:54

Your First Overflow (easy)

Time of First Successful Submission: 2026-03-27 13:13:07

Your First Overflow (hard)

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Precision (easy)

Time of First Successful Submission: 2026-03-27 13:22:24

Precision (hard)

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Variable Control (easy)

Time of First Successful Submission: 2026-03-27 13:36:19

Variable Control (hard)

Time of First Successful Submission: 2026-03-27 13:57:24

Control Hijack (easy)

Time of First Successful Submission: 2026-03-27 14:05:01

Control Hijack (hard)

Time of First Successful Submission: 2026-03-27 14:11:25

Tricky Control Hijack (easy)

Time of First Successful Submission: 2026-03-27 14:17:18

Tricky Control Hijack (hard)

Time of First Successful Submission: 2026-03-27 14:22:35

PIEs (easy)

Time of First Successful Submission: 2026-04-02 13:48:32

PIEs (hard)

Time of First Successful Submission: 2026-04-02 15:30:32

String Lengths (easy)

Time of First Successful Submission: 2026-04-02 15:40:26

String Lengths (hard)

Time of First Successful Submission: 2026-04-02 15:45:16

Basic Shellcode

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NOP Sleds

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NULL-Free Shellcode

Time of First Successful Submission: 2026-04-02 15:58:21

Hijack to (Mapped) Shellcode (easy)

Time of First Successful Submission: 2026-04-02 21:24:09

Hijack to (Mapped) Shellcode (hard)

Time of First Successful Submission: 2026-04-02 21:39:09

Hijack to Shellcode (easy)

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Start Here

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Using the Terminal

Time of First Successful Submission: 2026-01-14 05:59:40

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

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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

Time of First Successful Submission: 2026-01-14 22:46:35

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

Time of First Successful Submission: 2026-01-14 23:07:32

making directories

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finding files

Time of First Successful Submission: 2026-01-14 23:28:34

linking files

Time of First Successful Submission: 2026-01-14 23:33:05

Learning From Documentation

Time of First Successful Submission: 2026-01-14 23:40:35

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

Time of First Successful Submission: 2026-01-15 02:10:41

Redirecting more output

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Appending output

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Redirecting errors

Time of First Successful Submission: 2026-01-15 02:17:08

Redirecting input

Time of First Successful Submission: 2026-01-15 02:19:03

Grepping stored results

Time of First Successful Submission: 2026-01-15 02:24:54

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

Time of First Successful Submission: 2026-01-16 18:27:10

Deleting characters

Time of First Successful Submission: 2026-01-16 18:28:49

Deleting newlines

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Extracting the first lines with head

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Extracting specific sections of text

Time of First Successful Submission: 2026-01-16 18:37:56

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: 2026-01-16 21:21:51

Using sudo

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Changing File Ownership

Time of First Successful Submission: 2026-01-16 21:27:38

Groups and Files

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Fun With Groups Names

Time of First Successful Submission: 2026-01-16 21:37:41

Changing Permissions

Time of First Successful Submission: 2026-01-16 22:00:02

Executable Files

Time of First Successful Submission: 2026-01-16 22:04:33

Permission Tweaking Practice

Time of First Successful Submission: 2026-01-16 22:20:25

Permissions Setting Practice

Time of First Successful Submission: 2026-01-16 22:31:18

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: 2026-01-17 00:40:58

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

Time of First Successful Submission: 2026-01-17 01:08:52

Switching Windows

Time of First Successful Submission: 2026-01-17 01:12:17

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-01-17 01:27:16

Switching Windows (tmux)

Time of First Successful Submission: 2026-01-17 01:31:20

The PATH Variable

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Setting PATH

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Finding Commands

Time of First Successful Submission: 2026-01-17 06:07:45

Adding Commands

Time of First Successful Submission: 2026-01-17 06:13:20

Hijacking Commands

Time of First Successful Submission: 2026-01-17 06:15:19

Bashrc Backdoor

Time of First Successful Submission: 2026-01-17 06:19:29

Sniffing Input

Time of First Successful Submission: 2026-01-17 06:21:49

Overshared Directories

Time of First Successful Submission: 2026-02-05 15:22:53

Tricky Linking

Time of First Successful Submission: 2026-01-17 08:18:44

Sniffing Process Arguments

Time of First Successful Submission: 2026-01-17 21:22:56

Snooping on Configurations

Time of First Successful Submission: 2026-01-17 21:24:13

The Fork Bomb

Time of First Successful Submission: 2026-01-17 22:06:54

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

Time of First Successful Submission: 2026-02-16 23:33:26

Building Executables

Time of First Successful Submission: 2026-02-16 23:36:07

Moving Between Registers

Time of First Successful Submission: 2026-02-16 23:38:12

Loading From Memory

Time of First Successful Submission: 2026-02-17 18:57:37

More Loading Practice

Time of First Successful Submission: 2026-02-17 18:59:32

Dereferencing Pointers

Time of First Successful Submission: 2026-02-17 19:01:08

Dereferencing Yourself

Time of First Successful Submission: 2026-02-17 19:02:17

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-17 19:03:19

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

Time of First Successful Submission: 2026-02-18 04:58:19

Popping From the Stack

Time of First Successful Submission: 2026-02-18 05:00:46

Disassembling Programs

Time of First Successful Submission: 2026-02-18 05:03:59

Tracing Syscalls

Time of First Successful Submission: 2026-02-17 14:21:11

Starting GDB

Time of First Successful Submission: 2026-02-17 14:22:20

Quitting GDB

Time of First Successful Submission: 2026-02-18 05:07:01

Starting Programs in GDB

Time of First Successful Submission: 2026-02-17 14:23:25

Disassembling in GDB

Time of First Successful Submission: 2026-02-18 05:17:39

Stepping Through Instructions

Time of First Successful Submission: 2026-02-19 00:55:13

Reading Register Values

Time of First Successful Submission: 2026-02-19 00:56:54

Popping Stack Values

Time of First Successful Submission: 2026-02-19 00:57:48

Examining Memory

Time of First Successful Submission: 2026-02-19 00:59:14

Examining Stack Pointers

Time of First Successful Submission: 2026-02-19 01:01:10

Cooperative Debugging

Time of First Successful Submission: 2026-02-19 01:02:50

Writing Output

Time of First Successful Submission: 2026-02-19 01:11:14

Chaining Syscalls

Time of First Successful Submission: 2026-02-19 01:12:39

Writing Strings

Time of First Successful Submission: 2026-02-19 01:14:38

Reading Data

Time of First Successful Submission: 2026-02-19 01:16:07

Opening Files

Time of First Successful Submission: 2026-02-19 01:18:58

Hardcoding the Filename

Time of First Successful Submission: 2026-02-19 01:20:07

Comparing Values

Time of First Successful Submission: 2026-02-19 01:22:51

Comparing Characters

Time of First Successful Submission: 2026-02-19 01:26:00

Conditional Control Flow

Time of First Successful Submission: 2026-02-19 01:28:08

Comparing Strings

Time of First Successful Submission: 2026-02-19 01:29:00

Reverse the Password

Time of First Successful Submission: 2026-02-19 01:31:11

Conditionals Without Conditionals

Time of First Successful Submission: 2026-02-19 01:38:29

Looping

Time of First Successful Submission: 2026-02-19 01:40:00

Reverse the Calculation

Time of First Successful Submission: 2026-02-19 01:41:53

Reverse the Reverse

Time of First Successful Submission: 2026-02-19 01:42:45

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-02-19 01:44:11

Loops on Data

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set-register

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set-multiple-registers

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add-to-register

Time of First Successful Submission: 2026-02-19 15:13:49

linear-equation-registers

Time of First Successful Submission: 2026-02-19 15:15:15

integer-division

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modulo-operation

Time of First Successful Submission: 2026-02-19 15:18:23

set-upper-byte

Time of First Successful Submission: 2026-02-19 15:19:42

efficient-modulo

Time of First Successful Submission: 2026-02-19 15:21:03

byte-extraction

Time of First Successful Submission: 2026-02-19 15:23:44

bitwise-and

Time of First Successful Submission: 2026-02-19 15:25:06

check-even

Time of First Successful Submission: 2026-02-19 15:28:11

memory-read

Time of First Successful Submission: 2026-02-19 15:31:25

memory-write

Time of First Successful Submission: 2026-02-19 15:32:54

memory-increment

Time of First Successful Submission: 2026-02-19 15:35:18

byte-access

Time of First Successful Submission: 2026-02-19 15:37:20

memory-size-access

Time of First Successful Submission: 2026-02-19 15:42:48

little-endian-write

Time of First Successful Submission: 2026-02-19 15:45:35

memory-sum

Time of First Successful Submission: 2026-02-19 15:48:09

stack-subtraction

Time of First Successful Submission: 2026-02-19 15:49:05

swap-stack-values

Time of First Successful Submission: 2026-02-19 15:52:29

average-stack-values

Time of First Successful Submission: 2026-02-19 15:53:46

absolute-jump

Time of First Successful Submission: 2026-02-19 15:57:23

relative-jump

Time of First Successful Submission: 2026-02-19 16:04:15

jump-trampoline

Time of First Successful Submission: 2026-02-19 16:06:18

conditional-jump

Time of First Successful Submission: 2026-02-19 16:12:02

indirect-jump

Time of First Successful Submission: 2026-02-19 16:17:14

average-loop

Time of First Successful Submission: 2026-02-19 16:18:13

count-non-zero

Time of First Successful Submission: 2026-02-19 16:19:12

string-lower

Time of First Successful Submission: 2026-02-19 16:21:04

most-common-byte

Time of First Successful Submission: 2026-02-19 16:22:42

Exit

Time of First Successful Submission: 2026-02-26 14:24:37

Socket

Time of First Successful Submission: 2026-02-26 14:26:58

Bind

Time of First Successful Submission: 2026-02-26 14:28:45

Listen

Time of First Successful Submission: 2026-02-26 14:29:56

Accept

Time of First Successful Submission: 2026-02-26 14:31:04

Static Response

Time of First Successful Submission: 2026-02-26 14:33:44

Dynamic Response

Time of First Successful Submission: 2026-02-26 14:39:19

Iterative GET Server

Time of First Successful Submission: 2026-02-26 14:40:55

Concurrent GET Server

Time of First Successful Submission: 2026-02-26 14:42:29

Concurrent POST Server

Time of First Successful Submission: 2026-02-26 14:46:20

Web Server

Time of First Successful Submission: 2026-02-26 14:48:16

Debugging Programs

Time of First Successful Submission: 2026-02-20 14:26:56

Inspecting Registers

Time of First Successful Submission: 2026-02-20 14:34:17

Examining Memory

Time of First Successful Submission: 2026-02-22 19:45:09

Setting Breakpoints

Time of First Successful Submission: 2026-02-22 19:21:07

GDB Scripting

Time of First Successful Submission: 2026-02-23 03:21:47

Modifying Data

Time of First Successful Submission: 2026-02-23 04:52:22

Modifying Execution

Time of First Successful Submission: 2026-02-23 04:57:01

Broken Functions

Time of First Successful Submission: 2026-02-24 15:20:11

Playing With Programs

65 / 116 4206 / 23376

What's the password?

Time of First Successful Submission: 2026-01-21 15:00:07

... and again!

Time of First Successful Submission: 2026-01-21 15:00:41

Newline Troubles

Time of First Successful Submission: 2026-01-21 15:05:11

Reasoning about files

Time of First Successful Submission: 2026-01-21 15:37:59

Specifying Filenames

Time of First Successful Submission: 2026-01-21 15:40:17

Binary and Hex Encoding

Time of First Successful Submission: 2026-01-21 15:47:54

More Hex

Time of First Successful Submission: 2026-01-21 16:06:13

Decoding Hex

Time of First Successful Submission: 2026-01-21 16:15:56

Decoding Practice

Time of First Successful Submission: 2026-01-21 16:21:38

Encoding Practice

Time of First Successful Submission: 2026-01-21 16:30:08

Hex-encoding ASCII

Time of First Successful Submission: 2026-01-21 16:46:06

Nested Encoding

Time of First Successful Submission: 2026-01-21 17:11:10

Hex-encoding UTF-8

Time of First Successful Submission: 2026-01-21 18:19:47

UTF Mixups

Time of First Successful Submission: 2026-01-21 18:56:21

Modifying Encoded Data

Time of First Successful Submission: 2026-01-21 18:59:45

Decoding Base64

Time of First Successful Submission: 2026-01-21 19:03:03

Encoding Base64

Time of First Successful Submission: 2026-01-21 19:18:07

Dealing with Obfuscation

Time of First Successful Submission: 2026-01-21 19:42:19

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-01-21 19:47:52

Your First HTTP Request

Time of First Successful Submission: 2026-01-21 19:56:59

Reading Flask

Time of First Successful Submission: 2026-01-21 20:05:21

Commented Data

Time of First Successful Submission: 2026-01-21 20:15:00

HTTP Metadata

Time of First Successful Submission: 2026-01-21 20:18:46

HTTP (netcat)

Time of First Successful Submission: 2026-01-21 21:33:55

HTTP Paths (netcat)

Time of First Successful Submission: 2026-01-21 21:41:10

HTTP (curl)

Time of First Successful Submission: 2026-01-21 21:45:46

HTTP (python)

Time of First Successful Submission: 2026-01-21 21:49:28

HTTP Host Header (python)

Time of First Successful Submission: 2026-01-21 21:54:19

HTTP Host Header (curl)

Time of First Successful Submission: 2026-01-21 22:03:05

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-01-21 22:08:30

URL Encoding (netcat)

Time of First Successful Submission: 2026-01-21 22:12:07

HTTP GET Parameters

Time of First Successful Submission: 2026-01-21 22:14:31

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-01-25 19:21:20

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-01-26 04:56:05

HTTP Forms

Time of First Successful Submission: 2026-01-26 04:59:40

HTTP Forms (curl)

Time of First Successful Submission: 2026-01-26 05:06:46

HTTP Forms (netcat)

Time of First Successful Submission: 2026-01-28 00:45:07

HTTP Forms (python)

Time of First Successful Submission: 2026-01-28 00:46:16

HTTP Forms Without Forms

Time of First Successful Submission: 2026-01-28 01:18:35

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-01-28 01:21:04

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-01-28 01:23:44

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-01-28 01:26:31

HTTP Redirects (curl)

Time of First Successful Submission: 2026-01-28 01:27:43

HTTP Redirects (python)

Time of First Successful Submission: 2026-01-28 01:30:12

HTTP Cookies (curl)

Time of First Successful Submission: 2026-01-28 01:32:42

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-01-28 01:35:46

HTTP Cookies (python)

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

Server State (python)

Time of First Successful Submission: 2026-01-28 01:39:41

Listening Web

Time of First Successful Submission: 2026-01-28 01:48:21

Speaking Redirects

Time of First Successful Submission: 2026-01-28 17:55:41

JavaScript Redirects

Time of First Successful Submission: 2026-01-28 18:04:15

Including JavaScript

Time of First Successful Submission: 2026-01-28 18:21:43

HTTP (javascript)

Time of First Successful Submission: 2026-01-28 19:03:31

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-01-28 19:58:46

HTTP Forms (javascript)

Time of First Successful Submission: 2026-01-28 20:09:54

SQL Queries

Time of First Successful Submission: 2026-01-29 04:13:20

Filtering SQL

Time of First Successful Submission: 2026-01-29 04:16:28

Choosing Columns

Time of First Successful Submission: 2026-01-29 04:23:53

Exclusionary Filtering

Time of First Successful Submission: 2026-01-29 04:25:47

Filtering Strings

Time of First Successful Submission: 2026-01-29 04:28:35

Filtering on Expressions

Time of First Successful Submission: 2026-01-29 04:30:17

SELECTing Expressions

Time of First Successful Submission: 2026-01-29 04:46:09

Composite Conditions

Time of First Successful Submission: 2026-01-29 04:51:34

Reaching Your LIMITs

Time of First Successful Submission: 2026-01-29 04:53:40

Querying Metadata

Time of First Successful Submission: 2026-01-29 04:55:21

GCA CTF

12 / 104 1026 / 43594

Using the Terminal

Time of First Successful Submission: 2026-01-14 05:59:40

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-14 06:00:40

Using the GUI Desktop

Time of First Successful Submission: 2026-01-14 06:06:12

Pasting into the Desktop

Time of First Successful Submission: 2026-01-14 06:07:37

Connecting over SSH

Time of First Successful Submission: 2026-01-14 18:15:19

Restarting Challenges

Time of First Successful Submission: 2026-01-14 06:37:39

Getting Help

Time of First Successful Submission: 2026-01-14 06:39:48

Challenge Programs

Time of First Successful Submission: 2026-01-14 18:21:23

The Flag File

Time of First Successful Submission: 2026-01-14 18:29:20

Using Privileged Mode

Time of First Successful Submission: 2026-01-14 19:19:05

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-14 19:27:05

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-14 19:31:14