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Triple Dereference

Time of First Successful Submission: 2025-12-05 18:36:15


Intro to Programming Languages

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Commands

Time of First Successful Submission: 2025-11-20 01:43:31

Command Arguments

Time of First Successful Submission: 2025-11-20 01:45:47

Command History

Time of First Successful Submission: 2025-11-20 01:47:55

The Root Path

Time of First Successful Submission: 2025-11-20 15:14:56

Absolute Paths

Time of First Successful Submission: 2025-11-20 15:24:55

Changing position

Time of First Successful Submission: 2025-11-20 15:56:08

Changing to an Absolute Path

Time of First Successful Submission: 2025-11-20 16:02:11

Relative Paths

Time of First Successful Submission: 2025-11-20 16:58:31

Cat

Time of First Successful Submission: 2025-11-20 17:43:47

Ls

Time of First Successful Submission: 2025-11-20 18:20:40

Ls All

Time of First Successful Submission: 2025-11-20 19:57:13

Find

Time of First Successful Submission: 2025-11-20 21:00:53

Piping Echo

Time of First Successful Submission: 2025-11-22 00:00:49

Piping Stdout

Time of First Successful Submission: 2025-11-22 00:06:16

Piping Stdin

Time of First Successful Submission: 2025-11-22 18:43:27


Intro to Cybersecurity

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XSS 1

Time of First Successful Submission: 2025-12-26 23:00:45


Start Here

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Using the Terminal

Time of First Successful Submission: 2025-11-20 00:35:51

Using the VSCode Workspace

Time of First Successful Submission: 2025-11-20 00:42:57

Using the GUI Desktop

Time of First Successful Submission: 2025-11-20 00:50:07

Pasting into the Desktop

Time of First Successful Submission: 2025-11-20 01:00:16

Restarting Challenges

Time of First Successful Submission: 2025-11-20 01:19:37

Challenge Programs

Time of First Successful Submission: 2025-11-19 20:13:51

The Flag File

Time of First Successful Submission: 2025-11-19 20:23:38

Using Privileged Mode

Time of First Successful Submission: 2025-11-19 21:02:19

Persistent Home Directories - One

Time of First Successful Submission: 2025-11-20 01:28:50

Persistent Home Directories - Two

Time of First Successful Submission: 2025-11-20 01:31:55


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2025-11-20 01:43:31

Intro to Arguments

Time of First Successful Submission: 2025-11-20 01:45:47

Command History

Time of First Successful Submission: 2025-11-20 01:47:55

The Root

Time of First Successful Submission: 2025-11-20 15:14:56

Program and absolute paths

Time of First Successful Submission: 2025-11-20 15:24:55

Position thy self

Time of First Successful Submission: 2025-11-20 15:56:08

Position elsewhere

Time of First Successful Submission: 2025-11-20 16:02:11

implicit relative paths, from /

Time of First Successful Submission: 2025-11-20 16:58:31

explicit relative paths, from /

Time of First Successful Submission: 2025-11-20 17:03:25

implicit relative path

Time of First Successful Submission: 2025-11-20 17:07:25

home sweet home

Time of First Successful Submission: 2025-11-20 17:27:32

cat: not the pet, but the command!

Time of First Successful Submission: 2025-11-20 17:43:47

catting absolute paths

Time of First Successful Submission: 2025-11-20 17:52:03

more catting practice

Time of First Successful Submission: 2025-11-20 17:53:53

grepping for a needle in a haystack

Time of First Successful Submission: 2025-11-20 18:04:06

comparing files

Time of First Successful Submission: 2025-11-20 18:14:07

listing files

Time of First Successful Submission: 2025-11-20 18:20:40

touching files

Time of First Successful Submission: 2025-11-20 18:24:48

removing files

Time of First Successful Submission: 2025-11-20 18:26:42

moving files

Time of First Successful Submission: 2025-11-20 19:41:21

copying files

Time of First Successful Submission: 2025-11-20 19:48:11

hidden files

Time of First Successful Submission: 2025-11-20 19:57:13

An Epic Filesystem Quest

Time of First Successful Submission: 2025-11-20 20:32:26

making directories

Time of First Successful Submission: 2025-11-20 20:36:46

finding files

Time of First Successful Submission: 2025-11-20 21:00:53

linking files

Time of First Successful Submission: 2025-11-20 21:37:53

Learning From Documentation

Time of First Successful Submission: 2025-11-20 22:35:43

Learning Complex Usage

Time of First Successful Submission: 2025-11-20 23:01:36

Reading Manuals

Time of First Successful Submission: 2025-11-20 23:12:11

Searching Manuals

Time of First Successful Submission: 2025-11-20 23:40:59

Searching For Manuals

Time of First Successful Submission: 2025-11-21 19:35:06

Helpful Programs

Time of First Successful Submission: 2025-11-21 19:41:48

Help for Builtins

Time of First Successful Submission: 2025-11-21 19:48:37

Matching with *

Time of First Successful Submission: 2025-11-21 20:03:17

Matching with ?

Time of First Successful Submission: 2025-11-21 20:11:10

Matching with []

Time of First Successful Submission: 2025-11-21 20:17:58

Matching paths with []

Time of First Successful Submission: 2025-11-21 20:23:07

Multiple globs

Time of First Successful Submission: 2025-11-21 20:30:03

Mixing globs

Time of First Successful Submission: 2025-11-21 21:14:50

Exclusionary globbing

Time of First Successful Submission: 2025-11-21 21:25:19

Tab completion

Time of First Successful Submission: 2025-11-21 22:14:12

Multiple options for tab completion

Time of First Successful Submission: 2025-11-21 23:47:18

Tab completion on commands

Time of First Successful Submission: 2025-11-21 23:54:55

Redirecting output

Time of First Successful Submission: 2025-11-22 00:00:49

Redirecting more output

Time of First Successful Submission: 2025-11-22 00:06:16

Appending output

Time of First Successful Submission: 2025-11-22 18:34:00

Redirecting errors

Time of First Successful Submission: 2025-11-22 18:37:45

Redirecting input

Time of First Successful Submission: 2025-11-22 18:43:27

Grepping stored results

Time of First Successful Submission: 2025-11-22 19:09:47

Grepping live output

Time of First Successful Submission: 2025-11-22 19:14:05

Grepping errors

Time of First Successful Submission: 2025-11-22 21:08:22

Filtering with grep -v

Time of First Successful Submission: 2025-11-22 21:24:54

Filtering with sed

Time of First Successful Submission: 2025-11-22 21:38:47

Duplicating piped data with tee

Time of First Successful Submission: 2025-11-22 21:53:49

Process substitution for input

Time of First Successful Submission: 2025-11-22 22:09:25

Writing to multiple programs

Time of First Successful Submission: 2025-11-22 22:36:20

Split-piping stderr and stdout

Time of First Successful Submission: 2025-11-22 22:50:15

Named pipes

Time of First Successful Submission: 2025-11-22 23:29:56

Printing Variables

Time of First Successful Submission: 2025-11-23 00:18:25

Setting Variables

Time of First Successful Submission: 2025-11-23 00:30:09

Multi-word Variables

Time of First Successful Submission: 2025-11-23 18:20:53

Exporting Variables

Time of First Successful Submission: 2025-11-23 18:48:12

Printing Exported Variables

Time of First Successful Submission: 2025-11-23 18:54:41

Storing Command Output

Time of First Successful Submission: 2025-11-23 19:00:36

Reading Input

Time of First Successful Submission: 2025-11-23 19:08:41

Reading Files

Time of First Successful Submission: 2025-11-23 19:18:13

Translating characters

Time of First Successful Submission: 2025-11-23 19:24:58

Deleting characters

Time of First Successful Submission: 2025-11-23 19:32:17

Deleting newlines

Time of First Successful Submission: 2025-11-23 19:43:50

Extracting the first lines with head

Time of First Successful Submission: 2025-11-23 19:48:08

Extracting specific sections of text

Time of First Successful Submission: 2025-11-23 20:15:51

Sorting data

Time of First Successful Submission: 2025-11-23 20:20:51

Listing Processes

Time of First Successful Submission: 2025-11-23 20:37:04

Killing Processes

Time of First Successful Submission: 2025-11-23 20:43:50

Interrupting Processes

Time of First Successful Submission: 2025-11-23 20:47:38

Killing Misbehaving Processes

Time of First Successful Submission: 2025-11-23 21:09:52

Suspending Processes

Time of First Successful Submission: 2025-11-23 21:30:21

Resuming Processes

Time of First Successful Submission: 2025-11-23 21:31:53

Backgrounding Processes

Time of First Successful Submission: 2025-11-23 21:41:44

Foregrounding Processes

Time of First Successful Submission: 2025-11-23 21:48:22

Starting Backgrounded Processes

Time of First Successful Submission: 2025-11-23 21:50:25

Process Exit Codes

Time of First Successful Submission: 2025-11-23 21:58:14

Becoming root with su

Time of First Successful Submission: 2025-11-23 22:16:16

Other users with su

Time of First Successful Submission: 2025-11-23 22:20:15

Cracking passwords

Time of First Successful Submission: 2025-11-23 22:50:39

Using sudo

Time of First Successful Submission: 2025-11-23 23:12:33

Changing File Ownership

Time of First Successful Submission: 2025-11-25 23:17:12

Groups and Files

Time of First Successful Submission: 2025-11-25 23:34:49

Fun With Groups Names

Time of First Successful Submission: 2025-11-25 23:52:19

Changing Permissions

Time of First Successful Submission: 2025-11-25 23:59:50

Executable Files

Time of First Successful Submission: 2025-11-26 00:03:23

Permission Tweaking Practice

Time of First Successful Submission: 2025-11-26 00:13:50

Permissions Setting Practice

Time of First Successful Submission: 2025-11-26 21:28:38

The SUID Bit

Time of First Successful Submission: 2025-11-26 21:37:59

Chaining with Semicolons

Time of First Successful Submission: 2025-11-26 21:41:13

Building on Success

Time of First Successful Submission: 2025-11-26 21:49:02

Handling Failure

Time of First Successful Submission: 2025-11-26 21:53:17

Your First Shell Script

Time of First Successful Submission: 2025-11-26 22:03:06

Redirecting Script Output

Time of First Successful Submission: 2025-11-26 22:19:13

Executable Shell Scripts

Time of First Successful Submission: 2025-11-26 22:28:16

Understanding Shebangs

Time of First Successful Submission: 2025-11-26 22:41:36

Scripting with Arguments

Time of First Successful Submission: 2025-11-26 23:02:44

Scripting with Conditionals

Time of First Successful Submission: 2025-11-26 23:39:11

Scripting with Default Cases

Time of First Successful Submission: 2025-11-26 23:42:32

Scripting with Multiple Conditions

Time of First Successful Submission: 2025-11-27 00:00:17

Reading Shell Scripts

Time of First Successful Submission: 2025-11-27 00:07:16

Launching Screen

Time of First Successful Submission: 2025-11-27 00:12:27

Detaching and Attaching

Time of First Successful Submission: 2025-11-27 00:18:17

Finding Sessions

Time of First Successful Submission: 2025-11-27 00:28:49

Switching Windows

Time of First Successful Submission: 2025-11-27 00:51:57

Detaching and Attaching (tmux)

Time of First Successful Submission: 2025-11-27 00:56:59

Switching Windows (tmux)

Time of First Successful Submission: 2025-11-27 01:07:24

The PATH Variable

Time of First Successful Submission: 2025-11-27 01:14:32

Setting PATH

Time of First Successful Submission: 2025-11-27 01:20:40

Finding Commands

Time of First Successful Submission: 2025-11-27 18:22:42

Adding Commands

Time of First Successful Submission: 2025-11-27 18:53:56

Hijacking Commands

Time of First Successful Submission: 2025-11-27 19:03:03

Bashrc Backdoor

Time of First Successful Submission: 2025-11-27 19:38:07

Sniffing Input

Time of First Successful Submission: 2025-11-27 19:44:54

Overshared Directories

Time of First Successful Submission: 2025-11-27 20:38:13

Tricky Linking

Time of First Successful Submission: 2025-11-27 20:48:33

Sniffing Process Arguments

Time of First Successful Submission: 2025-11-27 20:56:19

Snooping on Configurations

Time of First Successful Submission: 2025-11-27 21:07:38

The Fork Bomb

Time of First Successful Submission: 2025-11-27 22:28:21

Disk-Space Doomsday

Time of First Successful Submission: 2025-11-29 20:32:13

rm -rf /

Time of First Successful Submission: 2025-11-29 20:41:43

Life after rm -rf /

Time of First Successful Submission: 2025-11-29 20:46:07

Finding meaning after rm -rf /

Time of First Successful Submission: 2025-11-29 20:54:29


Computing 101

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Your First Register

Time of First Successful Submission: 2025-11-30 13:20:34

Your First Syscall

Time of First Successful Submission: 2025-11-30 18:56:25

Exit Codes

Time of First Successful Submission: 2025-11-30 19:19:07

Building Executables

Time of First Successful Submission: 2025-11-30 19:41:21

Moving Between Registers

Time of First Successful Submission: 2025-11-30 19:57:15

Loading From Memory

Time of First Successful Submission: 2025-12-01 22:54:00

More Loading Practice

Time of First Successful Submission: 2025-12-03 19:50:19

Dereferencing Pointers

Time of First Successful Submission: 2025-12-03 20:04:43

Dereferencing Yourself

Time of First Successful Submission: 2025-12-03 20:22:03

Dereferencing with Offsets

Time of First Successful Submission: 2025-12-05 17:36:49

Stored Addresses

Time of First Successful Submission: 2025-12-05 17:52:48

Double Dereference

Time of First Successful Submission: 2025-12-05 18:10:38

Tracing Syscalls

Time of First Successful Submission: 2025-11-30 20:45:09

Starting GDB

Time of First Successful Submission: 2025-11-30 20:50:15

Starting Programs in GDB

Time of First Successful Submission: 2025-11-30 20:54:15

Writing Output

Time of First Successful Submission: 2025-12-15 23:13:38

Chaining Syscalls

Time of First Successful Submission: 2025-12-15 23:23:43

Writing Strings

Time of First Successful Submission: 2025-12-16 19:12:54

Reading Data

Time of First Successful Submission: 2025-12-16 19:23:46

set-register

Time of First Successful Submission: 2025-12-17 23:55:34

set-multiple-registers

Time of First Successful Submission: 2025-12-20 22:58:17

add-to-register

Time of First Successful Submission: 2025-12-20 23:07:11

linear-equation-registers

Time of First Successful Submission: 2025-12-20 23:12:02

integer-division

Time of First Successful Submission: 2025-12-20 23:24:45

modulo-operation

Time of First Successful Submission: 2025-12-20 23:37:12

set-upper-byte

Time of First Successful Submission: 2025-12-20 23:48:51

efficient-modulo

Time of First Successful Submission: 2025-12-26 18:16:08

byte-extraction

Time of First Successful Submission: 2025-12-26 22:17:22

bitwise-and

Time of First Successful Submission: 2026-01-07 16:37:58

check-even

Time of First Successful Submission: 2026-01-25 12:18:05

memory-read

Time of First Successful Submission: 2026-01-25 12:39:07

memory-write

Time of First Successful Submission: 2026-01-25 12:55:04

memory-increment

Time of First Successful Submission: 2026-01-25 13:22:06


Playing With Programs

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What's the password?

Time of First Successful Submission: 2025-11-30 20:59:26

... and again!

Time of First Successful Submission: 2025-11-30 21:00:35


GCA CTF

12 / 104 435 / 43462


Using the Terminal

Time of First Successful Submission: 2025-11-20 00:35:51

Using the VSCode Workspace

Time of First Successful Submission: 2025-11-20 00:42:57

Using the GUI Desktop

Time of First Successful Submission: 2025-11-20 00:50:07

Pasting into the Desktop

Time of First Successful Submission: 2025-11-20 01:00:16

Connecting over SSH

Time of First Successful Submission: 2025-11-20 01:14:31

Restarting Challenges

Time of First Successful Submission: 2025-11-20 01:19:37

Getting Help

Time of First Successful Submission: 2025-11-20 01:23:13

Challenge Programs

Time of First Successful Submission: 2025-11-19 20:13:51

The Flag File

Time of First Successful Submission: 2025-11-19 20:23:38

Using Privileged Mode

Time of First Successful Submission: 2025-11-19 21:02:19

Persistent Home Directories - One

Time of First Successful Submission: 2025-11-20 01:28:50

Persistent Home Directories - Two

Time of First Successful Submission: 2025-11-20 01:31:55