Grouel

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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-04-07 03:15:08

Command Arguments

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Command History

Time of First Successful Submission: 2026-04-07 03:20:29

The Root Path

Time of First Successful Submission: 2026-04-08 04:39:25

Absolute Paths

Time of First Successful Submission: 2026-04-08 04:40:19

Changing position

Time of First Successful Submission: 2026-04-08 04:45:53

Changing to an Absolute Path

Time of First Successful Submission: 2026-04-08 04:48:31

Relative Paths

Time of First Successful Submission: 2026-04-08 04:53:41

Cat

Time of First Successful Submission: 2026-04-08 05:24:54

Ls

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Ls All

Time of First Successful Submission: 2026-04-08 06:15:05

Find

Time of First Successful Submission: 2026-04-08 06:33:16

Piping Echo

Time of First Successful Submission: 2026-04-09 09:19:23

Piping Stdout

Time of First Successful Submission: 2026-04-09 10:20:13

Piping Stdin

Time of First Successful Submission: 2026-04-09 10:26:59


Intro to Cybersecurity

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Path Traversal 1

Time of First Successful Submission: 2026-04-29 13:56:27

Path Traversal 2

Time of First Successful Submission: 2026-04-29 16:15:01

CMDi 1

Time of First Successful Submission: 2026-04-30 03:24:05

CMDi 2

Time of First Successful Submission: 2026-04-30 03:44:26

CMDi 3

Time of First Successful Submission: 2026-04-30 05:52:05

CMDi 4

Time of First Successful Submission: 2026-04-30 11:01:21

CMDi 6

Time of First Successful Submission: 2026-04-30 12:25:25


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-04-06 08:56:29

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-06 08:58:22

Using the GUI Desktop

Time of First Successful Submission: 2026-04-06 09:01:32

Pasting into the Desktop

Time of First Successful Submission: 2026-04-06 09:04:23

Restarting Challenges

Time of First Successful Submission: 2026-04-06 09:24:28

Challenge Programs

Time of First Successful Submission: 2026-04-08 08:07:43

The Flag File

Time of First Successful Submission: 2026-04-08 08:08:59

Using Privileged Mode

Time of First Successful Submission: 2026-04-13 02:57:44

Persistent Home Directories - One

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Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-13 02:59:59


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-04-07 03:15:08

Intro to Arguments

Time of First Successful Submission: 2026-04-07 03:19:16

Command History

Time of First Successful Submission: 2026-04-07 03:20:29

The Root

Time of First Successful Submission: 2026-04-08 04:39:25

Program and absolute paths

Time of First Successful Submission: 2026-04-08 04:40:19

Position thy self

Time of First Successful Submission: 2026-04-08 04:45:53

Position elsewhere

Time of First Successful Submission: 2026-04-08 04:48:31

implicit relative paths, from /

Time of First Successful Submission: 2026-04-08 04:53:41

explicit relative paths, from /

Time of First Successful Submission: 2026-04-08 05:02:48

implicit relative path

Time of First Successful Submission: 2026-04-08 05:06:14

home sweet home

Time of First Successful Submission: 2026-04-08 05:18:05

cat: not the pet, but the command!

Time of First Successful Submission: 2026-04-08 05:24:54

catting absolute paths

Time of First Successful Submission: 2026-04-08 05:34:42

more catting practice

Time of First Successful Submission: 2026-04-08 05:36:43

grepping for a needle in a haystack

Time of First Successful Submission: 2026-04-08 05:38:12

comparing files

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listing files

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touching files

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removing files

Time of First Successful Submission: 2026-04-08 05:46:07

moving files

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copying files

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hidden files

Time of First Successful Submission: 2026-04-08 06:15:05

An Epic Filesystem Quest

Time of First Successful Submission: 2026-04-08 06:25:13

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

Time of First Successful Submission: 2026-04-09 09:06:21

Tab completion

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Multiple options for tab completion

Time of First Successful Submission: 2026-04-09 09:16:35

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: 2026-04-09 10:25:03

Redirecting input

Time of First Successful Submission: 2026-04-09 10:26:59

Grepping stored results

Time of First Successful Submission: 2026-04-09 10:29:34

Grepping live output

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Grepping errors

Time of First Successful Submission: 2026-04-09 10:38:37

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: 2026-04-09 11:04:46

Process substitution for input

Time of First Successful Submission: 2026-04-09 11:11:34

Writing to multiple programs

Time of First Successful Submission: 2026-04-09 11:38:23

Split-piping stderr and stdout

Time of First Successful Submission: 2026-04-09 12:07:45

Named pipes

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Printing Variables

Time of First Successful Submission: 2026-04-09 12:44:07

Setting Variables

Time of First Successful Submission: 2026-04-10 03:00:21

Multi-word Variables

Time of First Successful Submission: 2026-04-10 03:01:39

Exporting Variables

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

Printing Exported Variables

Time of First Successful Submission: 2026-04-10 03:12:23

Storing Command Output

Time of First Successful Submission: 2026-04-10 03:15:12

Reading Input

Time of First Successful Submission: 2026-04-10 03:20:18

Reading Files

Time of First Successful Submission: 2026-04-10 03:23:22

Translating characters

Time of First Successful Submission: 2026-04-10 03:34:43

Deleting characters

Time of First Successful Submission: 2026-04-10 03:43:10

Deleting newlines

Time of First Successful Submission: 2026-04-10 03:45:21

Extracting the first lines with head

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Extracting specific sections of text

Time of First Successful Submission: 2026-04-10 03:52:56

Sorting data

Time of First Successful Submission: 2026-04-10 03:58:40

Listing Processes

Time of First Successful Submission: 2026-04-10 07:54:21

Killing Processes

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Interrupting Processes

Time of First Successful Submission: 2026-04-10 07:56:24

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: 2026-04-10 08:44:26

Using sudo

Time of First Successful Submission: 2026-04-10 08:46:12

Changing File Ownership

Time of First Successful Submission: 2026-04-11 07:08:18

Groups and Files

Time of First Successful Submission: 2026-04-11 07:44:59

Fun With Groups Names

Time of First Successful Submission: 2026-04-11 07:52:03

Changing Permissions

Time of First Successful Submission: 2026-04-11 09:12:36

Executable Files

Time of First Successful Submission: 2026-04-11 09:15:13

Permission Tweaking Practice

Time of First Successful Submission: 2026-04-11 09:26:20

Permissions Setting Practice

Time of First Successful Submission: 2026-04-11 09:41:00

The SUID Bit

Time of First Successful Submission: 2026-04-11 11:15:35

Chaining with Semicolons

Time of First Successful Submission: 2026-04-11 11:23:47

Building on Success

Time of First Successful Submission: 2026-04-11 11:24:57

Handling Failure

Time of First Successful Submission: 2026-04-11 11:26:34

Your First Shell Script

Time of First Successful Submission: 2026-04-11 11:33:13

Redirecting Script Output

Time of First Successful Submission: 2026-04-12 03:24:11

Executable Shell Scripts

Time of First Successful Submission: 2026-04-11 12:05:06

Understanding Shebangs

Time of First Successful Submission: 2026-04-11 12:18:46

Scripting with Arguments

Time of First Successful Submission: 2026-04-11 12:51:04

Scripting with Conditionals

Time of First Successful Submission: 2026-04-11 12:56:03

Scripting with Default Cases

Time of First Successful Submission: 2026-04-11 13:01:26

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-04-12 03:08:18

Reading Shell Scripts

Time of First Successful Submission: 2026-04-12 03:14:38

Launching Screen

Time of First Successful Submission: 2026-04-11 16:01:10

Detaching and Attaching

Time of First Successful Submission: 2026-04-11 16:02:39

Finding Sessions

Time of First Successful Submission: 2026-04-12 07:30:49

Switching Windows

Time of First Successful Submission: 2026-04-12 07:32:31

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-04-12 07:34:36

Switching Windows (tmux)

Time of First Successful Submission: 2026-04-12 07:35:41

The PATH Variable

Time of First Successful Submission: 2026-04-12 07:37:47

Setting PATH

Time of First Successful Submission: 2026-04-12 07:40:06

Finding Commands

Time of First Successful Submission: 2026-04-12 07:41:37

Adding Commands

Time of First Successful Submission: 2026-04-12 08:08:19

Hijacking Commands

Time of First Successful Submission: 2026-04-12 08:17:10

Bashrc Backdoor

Time of First Successful Submission: 2026-04-12 08:46:13

Sniffing Input

Time of First Successful Submission: 2026-04-12 09:03:51

Overshared Directories

Time of First Successful Submission: 2026-04-12 13:22:38

Tricky Linking

Time of First Successful Submission: 2026-04-13 01:53:18

Sniffing Process Arguments

Time of First Successful Submission: 2026-04-13 01:58:07

Snooping on Configurations

Time of First Successful Submission: 2026-04-13 02:03:05

The Fork Bomb

Time of First Successful Submission: 2026-04-13 02:24:48

Disk-Space Doomsday

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rm -rf /

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Life after rm -rf /

Time of First Successful Submission: 2026-04-13 02:39:35

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-04-13 02:44:22


Computing 101

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Your First Register

Time of First Successful Submission: 2026-04-13 03:12:12

Your First Syscall

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Exit Codes

Time of First Successful Submission: 2026-04-13 03:22:27

Building Executables

Time of First Successful Submission: 2026-04-13 03:41:47

Moving Between Registers

Time of First Successful Submission: 2026-04-13 08:51:04

Loading From Memory

Time of First Successful Submission: 2026-04-13 12:06:49

More Loading Practice

Time of First Successful Submission: 2026-04-13 12:08:27

Dereferencing Pointers

Time of First Successful Submission: 2026-04-13 12:24:11

Dereferencing Yourself

Time of First Successful Submission: 2026-04-13 12:29:48

Dereferencing with Offsets

Time of First Successful Submission: 2026-04-13 12:32:15

Stored Addresses

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Double Dereference

Time of First Successful Submission: 2026-04-13 12:38:43

The Stack

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Stack Offsets

Time of First Successful Submission: 2026-04-13 13:26:16

Program Arguments on the Stack

Time of First Successful Submission: 2026-04-13 13:32:17

Popping From the Stack

Time of First Successful Submission: 2026-04-13 13:38:41

Disassembling Programs

Time of First Successful Submission: 2026-04-13 13:42:56

Tracing Syscalls

Time of First Successful Submission: 2026-04-13 13:45:33

Starting GDB

Time of First Successful Submission: 2026-04-13 13:47:07

Quitting GDB

Time of First Successful Submission: 2026-04-13 13:48:17

Starting Programs in GDB

Time of First Successful Submission: 2026-04-13 13:50:18

Disassembling in GDB

Time of First Successful Submission: 2026-04-13 13:51:33

Stepping Through Instructions

Time of First Successful Submission: 2026-04-13 13:54:44

Reading Register Values

Time of First Successful Submission: 2026-04-13 13:57:19

Popping Stack Values

Time of First Successful Submission: 2026-04-13 13:59:44

Examining Memory

Time of First Successful Submission: 2026-04-13 14:03:10

Examining Stack Pointers

Time of First Successful Submission: 2026-04-13 14:06:47

Cooperative Debugging

Time of First Successful Submission: 2026-04-13 14:12:18

Writing Output

Time of First Successful Submission: 2026-04-13 14:26:34

Chaining Syscalls

Time of First Successful Submission: 2026-04-13 14:30:28

Writing Strings

Time of First Successful Submission: 2026-04-13 14:31:29

Reading Data

Time of First Successful Submission: 2026-04-13 14:49:15

Opening Files

Time of First Successful Submission: 2026-04-14 02:59:29

Hardcoding the Filename

Time of First Successful Submission: 2026-04-14 08:58:42

Comparing Values

Time of First Successful Submission: 2026-04-14 09:42:41

Comparing Characters

Time of First Successful Submission: 2026-04-14 10:36:49

Conditional Control Flow

Time of First Successful Submission: 2026-04-14 10:44:47

Comparing Strings

Time of First Successful Submission: 2026-04-14 10:53:40

Reverse the Password

Time of First Successful Submission: 2026-04-14 11:03:47

Conditionals Without Conditionals

Time of First Successful Submission: 2026-04-14 12:44:03

Looping

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Reverse the Calculation

Time of First Successful Submission: 2026-04-14 13:14:08

Reverse the Reverse

Time of First Successful Submission: 2026-04-14 13:16:18

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-04-14 13:19:24

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: 2026-04-14 14:57:47

linear-equation-registers

Time of First Successful Submission: 2026-04-14 15:08:48

integer-division

Time of First Successful Submission: 2026-04-14 15:17:17

modulo-operation

Time of First Successful Submission: 2026-04-14 15:22:23

set-upper-byte

Time of First Successful Submission: 2026-04-14 15:30:36

efficient-modulo

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byte-extraction

Time of First Successful Submission: 2026-04-15 06:19:05

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

Time of First Successful Submission: 2026-04-15 07:26:42

memory-size-access

Time of First Successful Submission: 2026-04-15 07:29:05

little-endian-write

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memory-sum

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stack-subtraction

Time of First Successful Submission: 2026-04-15 08:00:48

swap-stack-values

Time of First Successful Submission: 2026-04-15 08:03:34

average-stack-values

Time of First Successful Submission: 2026-04-15 08:11:00

absolute-jump

Time of First Successful Submission: 2026-04-15 08:16:55

relative-jump

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jump-trampoline

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conditional-jump

Time of First Successful Submission: 2026-04-15 08:55:18

indirect-jump

Time of First Successful Submission: 2026-04-15 11:06:28

average-loop

Time of First Successful Submission: 2026-04-15 12:06:15

count-non-zero

Time of First Successful Submission: 2026-04-15 13:32:14

string-lower

Time of First Successful Submission: 2026-04-16 06:27:46

most-common-byte

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Exit

Time of First Successful Submission: 2026-04-16 08:22:24

Socket

Time of First Successful Submission: 2026-04-16 10:40:46

Bind

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Listen

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Accept

Time of First Successful Submission: 2026-04-16 12:04:02

Static Response

Time of First Successful Submission: 2026-04-17 02:41:52

Dynamic Response

Time of First Successful Submission: 2026-04-20 03:46:22

Iterative GET Server

Time of First Successful Submission: 2026-04-22 05:09:38

Concurrent GET Server

Time of First Successful Submission: 2026-04-22 05:46:35

Concurrent POST Server

Time of First Successful Submission: 2026-04-22 08:14:01

Web Server

Time of First Successful Submission: 2026-04-22 12:02:58

Debugging Programs

Time of First Successful Submission: 2026-04-17 04:58:27

Inspecting Registers

Time of First Successful Submission: 2026-04-17 05:03:33

Examining Memory

Time of First Successful Submission: 2026-04-17 05:46:10

Setting Breakpoints

Time of First Successful Submission: 2026-04-17 08:46:46

GDB Scripting

Time of First Successful Submission: 2026-04-21 11:56:50

Modifying Data

Time of First Successful Submission: 2026-04-22 12:30:08

Modifying Execution

Time of First Successful Submission: 2026-04-23 05:56:44

Broken Functions

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Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-04-23 06:27:36

... and again!

Time of First Successful Submission: 2026-04-23 06:29:55

Newline Troubles

Time of First Successful Submission: 2026-04-23 06:34:09

Reasoning about files

Time of First Successful Submission: 2026-04-23 06:39:10

Specifying Filenames

Time of First Successful Submission: 2026-04-23 06:45:46

Binary and Hex Encoding

Time of First Successful Submission: 2026-04-23 06:55:17

More Hex

Time of First Successful Submission: 2026-04-23 06:58:19

Decoding Hex

Time of First Successful Submission: 2026-04-23 10:30:55

Decoding Practice

Time of First Successful Submission: 2026-04-23 11:36:41

Encoding Practice

Time of First Successful Submission: 2026-04-23 14:49:02

Hex-encoding ASCII

Time of First Successful Submission: 2026-04-24 07:28:03

Nested Encoding

Time of First Successful Submission: 2026-04-24 07:47:04

Hex-encoding UTF-8

Time of First Successful Submission: 2026-04-24 08:02:45

UTF Mixups

Time of First Successful Submission: 2026-04-24 10:38:52

Modifying Encoded Data

Time of First Successful Submission: 2026-04-24 10:51:43

Decoding Base64

Time of First Successful Submission: 2026-04-24 11:07:05

Encoding Base64

Time of First Successful Submission: 2026-04-24 11:16:34

Dealing with Obfuscation

Time of First Successful Submission: 2026-04-24 11:25:25

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-04-24 11:43:57

Your First HTTP Request

Time of First Successful Submission: 2026-04-24 11:48:31

Reading Flask

Time of First Successful Submission: 2026-04-24 14:15:51

Commented Data

Time of First Successful Submission: 2026-04-24 15:24:59

HTTP Metadata

Time of First Successful Submission: 2026-04-24 15:29:12

HTTP (netcat)

Time of First Successful Submission: 2026-04-24 15:51:49

HTTP Paths (netcat)

Time of First Successful Submission: 2026-04-24 15:55:48

HTTP (curl)

Time of First Successful Submission: 2026-04-24 15:57:42

HTTP (python)

Time of First Successful Submission: 2026-04-24 16:20:38

HTTP Host Header (python)

Time of First Successful Submission: 2026-04-26 04:30:30

HTTP Host Header (curl)

Time of First Successful Submission: 2026-04-26 04:36:48

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-04-26 08:35:54

URL Encoding (netcat)

Time of First Successful Submission: 2026-04-26 08:50:29

HTTP GET Parameters

Time of First Successful Submission: 2026-04-26 15:15:32

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-04-26 15:32:27

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-04-26 15:37:24

HTTP Forms

Time of First Successful Submission: 2026-04-26 15:48:51

HTTP Forms (curl)

Time of First Successful Submission: 2026-04-27 01:31:58

HTTP Forms (netcat)

Time of First Successful Submission: 2026-04-27 01:49:58

HTTP Forms (python)

Time of First Successful Submission: 2026-04-27 02:04:14

HTTP Forms Without Forms

Time of First Successful Submission: 2026-04-27 02:13:24

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-04-27 02:19:15

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-04-27 02:30:52

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-04-27 02:37:51

HTTP Redirects (curl)

Time of First Successful Submission: 2026-04-27 02:40:31

HTTP Redirects (python)

Time of First Successful Submission: 2026-04-27 02:45:56

HTTP Cookies (curl)

Time of First Successful Submission: 2026-04-27 02:54:14

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-04-27 02:59:11

HTTP Cookies (python)

Time of First Successful Submission: 2026-04-27 03:06:58

Server State (python)

Time of First Successful Submission: 2026-04-27 03:34:18

Listening Web

Time of First Successful Submission: 2026-04-27 03:46:01

Speaking Redirects

Time of First Successful Submission: 2026-04-27 13:44:03

JavaScript Redirects

Time of First Successful Submission: 2026-04-27 14:00:27

Including JavaScript

Time of First Successful Submission: 2026-04-27 14:26:51

HTTP (javascript)

Time of First Successful Submission: 2026-04-28 02:57:05

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-04-28 03:04:56

HTTP Forms (javascript)

Time of First Successful Submission: 2026-04-28 03:15:26

cat

Time of First Successful Submission: 2026-04-28 03:24:04

more

Time of First Successful Submission: 2026-04-28 03:44:29

less

Time of First Successful Submission: 2026-04-28 03:46:01

tail

Time of First Successful Submission: 2026-04-28 09:01:20

head

Time of First Successful Submission: 2026-04-28 09:11:47

sort

Time of First Successful Submission: 2026-04-28 09:12:28

vim

Time of First Successful Submission: 2026-04-28 09:13:20

emacs

Time of First Successful Submission: 2026-04-28 09:14:55

nano

Time of First Successful Submission: 2026-04-28 09:59:49

rev

Time of First Successful Submission: 2026-04-28 10:02:09

od

Time of First Successful Submission: 2026-04-28 10:05:55

hd

Time of First Successful Submission: 2026-04-28 10:10:35

xxd

Time of First Successful Submission: 2026-04-28 10:17:54

base32

Time of First Successful Submission: 2026-04-28 10:21:08

base64

Time of First Successful Submission: 2026-04-28 10:21:57

split

Time of First Successful Submission: 2026-04-28 10:26:37

gzip

Time of First Successful Submission: 2026-04-28 10:51:53

bzip2

Time of First Successful Submission: 2026-04-28 10:55:40

zip

Time of First Successful Submission: 2026-04-28 11:03:12

tar

Time of First Successful Submission: 2026-04-28 11:15:41

ar

Time of First Successful Submission: 2026-04-28 12:52:00

cpio

Time of First Successful Submission: 2026-04-28 15:13:10

genisoimage

Time of First Successful Submission: 2026-04-28 15:31:03

env

Time of First Successful Submission: 2026-04-29 03:32:42

find

Time of First Successful Submission: 2026-04-29 04:50:22

make

Time of First Successful Submission: 2026-04-29 04:57:02

nice

Time of First Successful Submission: 2026-04-29 05:00:02

timeout

Time of First Successful Submission: 2026-04-29 05:01:02

stdbuf

Time of First Successful Submission: 2026-04-29 05:03:00

setarch

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

watch

Time of First Successful Submission: 2026-04-29 05:07:38

socat

Time of First Successful Submission: 2026-04-29 05:14:25

whiptail

Time of First Successful Submission: 2026-04-29 05:16:03

awk

Time of First Successful Submission: 2026-04-29 05:18:27

sed

Time of First Successful Submission: 2026-04-29 05:22:10

ed

Time of First Successful Submission: 2026-04-29 05:28:08

chown

Time of First Successful Submission: 2026-04-29 05:29:13

chmod

Time of First Successful Submission: 2026-04-29 05:30:05

cp

Time of First Successful Submission: 2026-04-29 05:34:17

mv

Time of First Successful Submission: 2026-04-29 06:19:58

perl

Time of First Successful Submission: 2026-04-29 06:28:30

python

Time of First Successful Submission: 2026-04-29 06:37:20

ruby

Time of First Successful Submission: 2026-04-29 06:40:20

bash

Time of First Successful Submission: 2026-04-29 06:43:03

date

Time of First Successful Submission: 2026-04-29 06:45:10

dmesg

Time of First Successful Submission: 2026-04-29 06:46:27

wc

Time of First Successful Submission: 2026-04-29 06:47:30

gcc

Time of First Successful Submission: 2026-04-29 06:49:09

as

Time of First Successful Submission: 2026-04-29 06:49:48

wget

Time of First Successful Submission: 2026-04-29 06:59:46

ssh-keygen

Time of First Successful Submission: 2026-04-29 07:10:27

SQL Queries

Time of First Successful Submission: 2026-04-28 15:46:13

Filtering SQL

Time of First Successful Submission: 2026-04-29 07:22:50

Choosing Columns

Time of First Successful Submission: 2026-04-29 07:55:22

Exclusionary Filtering

Time of First Successful Submission: 2026-04-29 08:27:32

Filtering Strings

Time of First Successful Submission: 2026-04-29 10:48:37

Filtering on Expressions

Time of First Successful Submission: 2026-04-29 11:02:58

SELECTing Expressions

Time of First Successful Submission: 2026-04-29 11:48:48

Composite Conditions

Time of First Successful Submission: 2026-04-29 12:01:34

Reaching Your LIMITs

Time of First Successful Submission: 2026-04-29 12:08:28

Querying Metadata

Time of First Successful Submission: 2026-04-29 12:24:15


GCA CTF

10 / 104 20553 / 45028


Using the Terminal

Time of First Successful Submission: 2026-04-06 08:56:29

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-06 08:58:22

Using the GUI Desktop

Time of First Successful Submission: 2026-04-06 09:01:32

Pasting into the Desktop

Time of First Successful Submission: 2026-04-06 09:04:23

Restarting Challenges

Time of First Successful Submission: 2026-04-06 09:24:28

Challenge Programs

Time of First Successful Submission: 2026-04-08 08:07:43

The Flag File

Time of First Successful Submission: 2026-04-08 08:08:59

Using Privileged Mode

Time of First Successful Submission: 2026-04-13 02:57:44

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-13 02:59:20

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-13 02:59:59