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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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Start Here

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Using the Terminal

Time of First Successful Submission: 2026-04-21 00:15:12

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-21 00:16:39

Using the GUI Desktop

Time of First Successful Submission: 2026-04-21 00:19:20

Pasting into the Desktop

Time of First Successful Submission: 2026-04-21 00:20:29

Restarting Challenges

Time of First Successful Submission: 2026-04-21 00:27:40

Challenge Programs

Time of First Successful Submission: 2026-04-21 00:31:45

The Flag File

Time of First Successful Submission: 2026-04-21 02:42:44

Using Privileged Mode

Time of First Successful Submission: 2026-04-21 02:47:37

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: 2026-04-21 03:06:37

Intro to Arguments

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Command History

Time of First Successful Submission: 2026-04-21 06:02:02

Computing 101

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Your First Register

Time of First Successful Submission: 2026-04-21 10:45:46

Your First Syscall

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Exit Codes

Time of First Successful Submission: 2026-04-21 10:56:29

Building Executables

Time of First Successful Submission: 2026-04-21 11:04:02

Moving Between Registers

Time of First Successful Submission: 2026-04-21 23:14:00

Loading From Memory

Time of First Successful Submission: 2026-04-23 06:04:44

More Loading Practice

Time of First Successful Submission: 2026-04-23 06:07:14

Dereferencing Pointers

Time of First Successful Submission: 2026-04-23 23:05:43

Dereferencing Yourself

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Dereferencing with Offsets

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Stored Addresses

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Double Dereference

Time of First Successful Submission: 2026-04-23 23:53:17

The Stack

Time of First Successful Submission: 2026-04-25 05:09:37

Stack Offsets

Time of First Successful Submission: 2026-04-25 05:11:55

Program Arguments on the Stack

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Popping From the Stack

Time of First Successful Submission: 2026-04-25 05:23:11

Disassembling Programs

Time of First Successful Submission: 2026-04-27 22:15:31

Tracing Syscalls

Time of First Successful Submission: 2026-04-27 22:21:47

Starting GDB

Time of First Successful Submission: 2026-04-27 22:23:57

Quitting GDB

Time of First Successful Submission: 2026-04-27 22:25:22

Starting Programs in GDB

Time of First Successful Submission: 2026-04-27 22:27:59

Disassembling in GDB

Time of First Successful Submission: 2026-04-27 22:28:50

Stepping Through Instructions

Time of First Successful Submission: 2026-04-27 22:30:38

Reading Register Values

Time of First Successful Submission: 2026-04-27 22:31:47

Popping Stack Values

Time of First Successful Submission: 2026-04-27 22:33:05

Examining Memory

Time of First Successful Submission: 2026-04-27 22:35:13

Examining Stack Pointers

Time of First Successful Submission: 2026-04-28 02:37:42

Cooperative Debugging

Time of First Successful Submission: 2026-04-28 02:46:53

Writing Output

Time of First Successful Submission: 2026-04-28 05:07:19

Chaining Syscalls

Time of First Successful Submission: 2026-04-28 05:09:29

Writing Strings

Time of First Successful Submission: 2026-04-28 05:11:33

Reading Data

Time of First Successful Submission: 2026-04-28 05:22:22

Opening Files

Time of First Successful Submission: 2026-04-28 05:44:12

Hardcoding the Filename

Time of First Successful Submission: 2026-04-28 06:06:25

Comparing Values

Time of First Successful Submission: 2026-04-29 05:17:02

Comparing Characters

Time of First Successful Submission: 2026-04-29 05:29:22

Conditional Control Flow

Time of First Successful Submission: 2026-04-29 05:41:16

Comparing Strings

Time of First Successful Submission: 2026-04-29 05:45:20

Reverse the Password

Time of First Successful Submission: 2026-04-29 05:53:58

Conditionals Without Conditionals

Time of First Successful Submission: 2026-04-29 07:00:54

Looping

Time of First Successful Submission: 2026-04-29 11:46:09

Reverse the Calculation

Time of First Successful Submission: 2026-04-29 23:10:06

Reverse the Reverse

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Dealing with Bitwise Operations

Time of First Successful Submission: 2026-04-29 23:26:07

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: 2026-04-30 00:10:38

linear-equation-registers

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integer-division

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modulo-operation

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set-upper-byte

Time of First Successful Submission: 2026-04-30 10:22:08

efficient-modulo

Time of First Successful Submission: 2026-04-30 10:32:35

byte-extraction

Time of First Successful Submission: 2026-05-01 00:02:09

bitwise-and

Time of First Successful Submission: 2026-05-01 00:12:06

check-even

Time of First Successful Submission: 2026-05-02 03:46:55

memory-read

Time of First Successful Submission: 2026-05-03 21:16:54

memory-write

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memory-increment

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byte-access

Time of First Successful Submission: 2026-05-03 21:52:09

memory-size-access

Time of First Successful Submission: 2026-05-03 21:54:25

little-endian-write

Time of First Successful Submission: 2026-05-03 21:59:03

memory-sum

Time of First Successful Submission: 2026-05-03 22:11:23

stack-subtraction

Time of First Successful Submission: 2026-05-03 22:15:16

swap-stack-values

Time of First Successful Submission: 2026-05-03 22:19:13

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: 2026-05-04 00:18:49

indirect-jump

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average-loop

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count-non-zero

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string-lower

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most-common-byte

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Exit

Time of First Successful Submission: 2026-05-06 23:03:22

Socket

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Bind

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Listen

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Accept

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Static Response

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Dynamic Response

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Iterative GET Server

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Concurrent GET Server

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Concurrent POST Server

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Web Server

Time of First Successful Submission: 2026-05-07 09:07:39

Debugging Programs

Time of First Successful Submission: 2026-05-07 22:51:44

Inspecting Registers

Time of First Successful Submission: 2026-05-07 22:54:04

Examining Memory

Time of First Successful Submission: 2026-05-07 23:07:38

Setting Breakpoints

Time of First Successful Submission: 2026-05-08 06:43:35

GDB Scripting

Time of First Successful Submission: 2026-05-08 07:02:30

Modifying Data

Time of First Successful Submission: 2026-05-08 09:25:15

Modifying Execution

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Broken Functions

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Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-05-08 23:59:45

... and again!

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Newline Troubles

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

Reasoning about files

Time of First Successful Submission: 2026-05-09 00:42:55

Specifying Filenames

Time of First Successful Submission: 2026-05-09 00:47:45

Binary and Hex Encoding

Time of First Successful Submission: 2026-05-09 01:08:17

More Hex

Time of First Successful Submission: 2026-05-09 01:23:55

Decoding Hex

Time of First Successful Submission: 2026-05-09 01:33:56

Decoding Practice

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Encoding Practice

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Hex-encoding ASCII

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Nested Encoding

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Hex-encoding UTF-8

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UTF Mixups

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Modifying Encoded Data

Time of First Successful Submission: 2026-05-09 10:35:08

Decoding Base64

Time of First Successful Submission: 2026-05-12 02:48:43

Encoding Base64

Time of First Successful Submission: 2026-05-12 02:51:43

Dealing with Obfuscation

Time of First Successful Submission: 2026-05-12 02:56:48

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-05-12 03:22:07

Your First HTTP Request

Time of First Successful Submission: 2026-05-12 09:49:43

Reading Flask

Time of First Successful Submission: 2026-05-12 09:54:11

Commented Data

Time of First Successful Submission: 2026-05-12 09:57:01

HTTP Metadata

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HTTP (netcat)

Time of First Successful Submission: 2026-05-12 23:26:04

HTTP Paths (netcat)

Time of First Successful Submission: 2026-05-12 23:27:51

HTTP (curl)

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HTTP (python)

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HTTP Host Header (python)

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HTTP Host Header (curl)

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HTTP Host Header (netcat)

Time of First Successful Submission: 2026-05-13 00:00:28

URL Encoding (netcat)

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HTTP GET Parameters

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Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-05-13 00:16:52

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-05-13 00:19:17

HTTP Forms

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HTTP Forms (curl)

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HTTP Forms (netcat)

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HTTP Forms (python)

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HTTP Forms Without Forms

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Multiple Form Fields (curl)

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Multiple Form Fields (netcat)

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HTTP Redirects (netcat)

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HTTP Redirects (curl)

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HTTP Redirects (python)

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HTTP Cookies (curl)

Time of First Successful Submission: 2026-05-13 09:40:48

HTTP Cookies (netcat)

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HTTP Cookies (python)

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Server State (python)

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Listening Web

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Speaking Redirects

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GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-04-21 00:15:12

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-21 00:16:39

Using the GUI Desktop

Time of First Successful Submission: 2026-04-21 00:19:20

Pasting into the Desktop

Time of First Successful Submission: 2026-04-21 00:20:29

Connecting over SSH

Time of First Successful Submission: 2026-04-21 00:24:22

Restarting Challenges

Time of First Successful Submission: 2026-04-21 00:27:40

Getting Help

Time of First Successful Submission: 2026-04-21 00:29:52

Challenge Programs

Time of First Successful Submission: 2026-04-21 00:31:45

The Flag File

Time of First Successful Submission: 2026-04-21 02:42:44

Using Privileged Mode

Time of First Successful Submission: 2026-04-21 02:47:37

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-21 02:49:21

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-21 02:50:09