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Triple Dereference

Time of First Successful Submission: 2026-02-17 03:58:35

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-02-11 17:24:08

Command Arguments

Time of First Successful Submission: 2026-02-11 17:24:52

Command History

Time of First Successful Submission: 2026-02-11 17:25:16

The Root Path

Time of First Successful Submission: 2026-02-11 17:26:51

Absolute Paths

Time of First Successful Submission: 2026-02-11 19:23:45

Changing position

Time of First Successful Submission: 2026-02-11 19:26:03

Changing to an Absolute Path

Time of First Successful Submission: 2026-02-11 19:27:57

Relative Paths

Time of First Successful Submission: 2026-02-11 19:29:08

Cat

Time of First Successful Submission: 2026-02-13 13:51:16

Ls

Time of First Successful Submission: 2026-02-13 14:09:08

Ls All

Time of First Successful Submission: 2026-02-13 14:22:36

Find

Time of First Successful Submission: 2026-02-13 14:40:47

Piping Echo

Time of First Successful Submission: 2026-02-13 19:45:40

Piping Stdout

Time of First Successful Submission: 2026-02-13 19:47:24

Piping Stdin

Time of First Successful Submission: 2026-02-14 02:04:42

Start Here

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Using the Terminal

Time of First Successful Submission: 2026-02-11 15:15:35

Using the VSCode Workspace

Time of First Successful Submission: 2025-07-23 01:19:43

Using the GUI Desktop

Time of First Successful Submission: 2026-02-11 16:36:20

Pasting into the Desktop

Time of First Successful Submission: 2026-02-11 16:43:38

Restarting Challenges

Time of First Successful Submission: 2026-02-11 16:53:34

Challenge Programs

Time of First Successful Submission: 2026-02-11 16:56:11

The Flag File

Time of First Successful Submission: 2026-02-11 17:01:41

Using Privileged Mode

Time of First Successful Submission: 2026-02-11 17:18:02

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-11 17:20:36

Persistent Home Directories - Two

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

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-02-11 17:24:08

Intro to Arguments

Time of First Successful Submission: 2026-02-11 17:24:52

Command History

Time of First Successful Submission: 2026-02-11 17:25:16

The Root

Time of First Successful Submission: 2026-02-11 17:26:51

Program and absolute paths

Time of First Successful Submission: 2026-02-11 19:23:45

Position thy self

Time of First Successful Submission: 2026-02-11 19:26:03

Position elsewhere

Time of First Successful Submission: 2026-02-11 19:27:57

implicit relative paths, from /

Time of First Successful Submission: 2026-02-11 19:29:08

explicit relative paths, from /

Time of First Successful Submission: 2026-02-11 19:30:24

implicit relative path

Time of First Successful Submission: 2026-02-11 19:31:18

home sweet home

Time of First Successful Submission: 2026-02-11 19:38:31

cat: not the pet, but the command!

Time of First Successful Submission: 2026-02-13 13:51:16

catting absolute paths

Time of First Successful Submission: 2026-02-13 13:52:18

more catting practice

Time of First Successful Submission: 2026-02-13 13:53:31

grepping for a needle in a haystack

Time of First Successful Submission: 2026-02-13 13:55:32

comparing files

Time of First Successful Submission: 2026-02-13 13:59:45

listing files

Time of First Successful Submission: 2026-02-13 14:09:08

touching files

Time of First Successful Submission: 2026-02-13 14:10:06

removing files

Time of First Successful Submission: 2026-02-13 14:11:47

moving files

Time of First Successful Submission: 2026-02-13 14:17:14

copying files

Time of First Successful Submission: 2026-02-13 14:19:41

hidden files

Time of First Successful Submission: 2026-02-13 14:22:36

An Epic Filesystem Quest

Time of First Successful Submission: 2026-02-13 14:36:17

making directories

Time of First Successful Submission: 2026-02-13 14:37:31

finding files

Time of First Successful Submission: 2026-02-13 14:40:47

linking files

Time of First Successful Submission: 2026-02-13 14:51:38

Learning From Documentation

Time of First Successful Submission: 2026-02-13 14:54:27

Learning Complex Usage

Time of First Successful Submission: 2026-02-13 15:00:45

Reading Manuals

Time of First Successful Submission: 2026-02-13 15:03:16

Searching Manuals

Time of First Successful Submission: 2026-02-13 15:32:36

Searching For Manuals

Time of First Successful Submission: 2026-02-13 15:55:30

Helpful Programs

Time of First Successful Submission: 2026-02-13 17:57:39

Help for Builtins

Time of First Successful Submission: 2026-02-13 17:59:42

Matching with *

Time of First Successful Submission: 2026-02-13 18:42:13

Matching with ?

Time of First Successful Submission: 2026-02-13 18:45:43

Matching with []

Time of First Successful Submission: 2026-02-13 18:48:51

Matching paths with []

Time of First Successful Submission: 2026-02-13 18:50:52

Multiple globs

Time of First Successful Submission: 2026-02-13 18:52:36

Mixing globs

Time of First Successful Submission: 2026-02-13 19:15:28

Exclusionary globbing

Time of First Successful Submission: 2026-02-13 19:21:01

Tab completion

Time of First Successful Submission: 2026-02-13 19:21:37

Multiple options for tab completion

Time of First Successful Submission: 2026-02-13 19:22:31

Tab completion on commands

Time of First Successful Submission: 2026-02-13 19:23:04

Redirecting output

Time of First Successful Submission: 2026-02-13 19:45:40

Redirecting more output

Time of First Successful Submission: 2026-02-13 19:47:24

Appending output

Time of First Successful Submission: 2026-02-14 01:51:36

Redirecting errors

Time of First Successful Submission: 2026-02-14 01:55:57

Redirecting input

Time of First Successful Submission: 2026-02-14 02:04:42

Grepping stored results

Time of First Successful Submission: 2026-02-14 02:05:52

Grepping live output

Time of First Successful Submission: 2026-02-14 02:07:07

Grepping errors

Time of First Successful Submission: 2026-02-14 02:12:06

Filtering with grep -v

Time of First Successful Submission: 2026-02-14 02:13:30

Filtering with sed

Time of First Successful Submission: 2026-02-14 02:15:10

Duplicating piped data with tee

Time of First Successful Submission: 2026-02-14 02:30:36

Process substitution for input

Time of First Successful Submission: 2026-02-14 02:50:21

Writing to multiple programs

Time of First Successful Submission: 2026-02-14 21:00:18

Split-piping stderr and stdout

Time of First Successful Submission: 2026-02-14 21:03:40

Named pipes

Time of First Successful Submission: 2026-02-14 21:10:14

Printing Variables

Time of First Successful Submission: 2026-02-14 02:51:55

Setting Variables

Time of First Successful Submission: 2026-02-14 02:52:25

Multi-word Variables

Time of First Successful Submission: 2026-02-14 02:52:56

Exporting Variables

Time of First Successful Submission: 2026-02-14 02:54:38

Printing Exported Variables

Time of First Successful Submission: 2026-02-14 02:55:30

Storing Command Output

Time of First Successful Submission: 2026-02-14 02:56:36

Reading Input

Time of First Successful Submission: 2026-02-14 02:57:50

Reading Files

Time of First Successful Submission: 2026-02-14 03:00:55

Translating characters

Time of First Successful Submission: 2026-02-14 15:50:09

Deleting characters

Time of First Successful Submission: 2026-02-14 15:55:21

Deleting newlines

Time of First Successful Submission: 2026-02-14 15:56:34

Extracting the first lines with head

Time of First Successful Submission: 2026-02-14 15:57:32

Extracting specific sections of text

Time of First Successful Submission: 2026-02-14 15:59:32

Sorting data

Time of First Successful Submission: 2026-02-14 16:00:18

Listing Processes

Time of First Successful Submission: 2026-02-14 20:10:33

Killing Processes

Time of First Successful Submission: 2026-02-14 20:12:03

Interrupting Processes

Time of First Successful Submission: 2026-02-14 20:13:04

Killing Misbehaving Processes

Time of First Successful Submission: 2026-02-14 20:15:22

Suspending Processes

Time of First Successful Submission: 2026-02-14 20:16:14

Resuming Processes

Time of First Successful Submission: 2026-02-14 20:18:59

Backgrounding Processes

Time of First Successful Submission: 2026-02-14 20:21:32

Foregrounding Processes

Time of First Successful Submission: 2026-02-14 20:23:29

Starting Backgrounded Processes

Time of First Successful Submission: 2026-02-14 20:23:58

Process Exit Codes

Time of First Successful Submission: 2026-02-14 20:25:34

Becoming root with su

Time of First Successful Submission: 2026-02-14 03:44:21

Other users with su

Time of First Successful Submission: 2026-02-14 03:45:32

Cracking passwords

Time of First Successful Submission: 2026-02-14 03:48:57

Using sudo

Time of First Successful Submission: 2026-02-14 03:50:02

Changing File Ownership

Time of First Successful Submission: 2026-02-14 21:12:25

Groups and Files

Time of First Successful Submission: 2026-02-14 21:17:08

Fun With Groups Names

Time of First Successful Submission: 2026-02-14 21:18:07

Changing Permissions

Time of First Successful Submission: 2026-02-14 21:18:48

Executable Files

Time of First Successful Submission: 2026-02-14 21:19:23

Permission Tweaking Practice

Time of First Successful Submission: 2026-02-14 21:27:29

Permissions Setting Practice

Time of First Successful Submission: 2026-02-14 21:51:35

The SUID Bit

Time of First Successful Submission: 2026-02-14 21:53:17

Chaining with Semicolons

Time of First Successful Submission: 2026-02-14 21:57:44

Building on Success

Time of First Successful Submission: 2026-02-14 22:01:11

Handling Failure

Time of First Successful Submission: 2026-02-14 22:03:18

Your First Shell Script

Time of First Successful Submission: 2026-02-14 22:05:43

Redirecting Script Output

Time of First Successful Submission: 2026-02-14 22:07:41

Executable Shell Scripts

Time of First Successful Submission: 2026-02-14 22:10:44

Understanding Shebangs

Time of First Successful Submission: 2026-02-14 22:13:08

Scripting with Arguments

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

Scripting with Conditionals

Time of First Successful Submission: 2026-02-14 22:16:46

Scripting with Default Cases

Time of First Successful Submission: 2026-02-14 22:19:43

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-02-14 22:21:30

Reading Shell Scripts

Time of First Successful Submission: 2026-02-14 22:22:45

Launching Screen

Time of First Successful Submission: 2026-02-14 15:22:27

Detaching and Attaching

Time of First Successful Submission: 2026-02-14 15:24:09

Finding Sessions

Time of First Successful Submission: 2026-02-14 15:30:48

Switching Windows

Time of First Successful Submission: 2026-02-14 22:29:19

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-02-14 15:37:49

Switching Windows (tmux)

Time of First Successful Submission: 2026-02-14 22:31:05

The PATH Variable

Time of First Successful Submission: 2026-02-14 14:22:12

Setting PATH

Time of First Successful Submission: 2026-02-14 14:24:45

Finding Commands

Time of First Successful Submission: 2026-02-14 14:26:05

Adding Commands

Time of First Successful Submission: 2026-02-14 14:39:07

Hijacking Commands

Time of First Successful Submission: 2026-02-14 15:04:47

Bashrc Backdoor

Time of First Successful Submission: 2026-02-14 16:06:32

Sniffing Input

Time of First Successful Submission: 2026-02-14 16:14:40

Overshared Directories

Time of First Successful Submission: 2026-02-15 15:17:41

Tricky Linking

Time of First Successful Submission: 2026-02-15 19:46:32

Sniffing Process Arguments

Time of First Successful Submission: 2026-02-14 22:56:42

Snooping on Configurations

Time of First Successful Submission: 2026-02-14 22:58:33

The Fork Bomb

Time of First Successful Submission: 2026-02-14 23:09:23

Disk-Space Doomsday

Time of First Successful Submission: 2026-02-15 19:48:44

rm -rf /

Time of First Successful Submission: 2026-02-14 23:16:12

Life after rm -rf /

Time of First Successful Submission: 2026-02-15 19:56:05

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-02-15 20:00:09

Computing 101

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Your First Register

Time of First Successful Submission: 2026-02-16 15:34:37

Your First Syscall

Time of First Successful Submission: 2026-02-16 16:17:23

Exit Codes

Time of First Successful Submission: 2026-02-16 16:20:07

Building Executables

Time of First Successful Submission: 2026-02-17 01:08:35

Moving Between Registers

Time of First Successful Submission: 2026-02-17 01:14:29

Loading From Memory

Time of First Successful Submission: 2026-02-17 01:43:47

More Loading Practice

Time of First Successful Submission: 2026-02-17 01:44:27

Dereferencing Pointers

Time of First Successful Submission: 2026-02-17 03:39:30

Dereferencing Yourself

Time of First Successful Submission: 2026-02-17 03:41:52

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-17 03:44:02

Stored Addresses

Time of First Successful Submission: 2026-02-17 03:52:53

Double Dereference

Time of First Successful Submission: 2026-02-17 03:54:46

The Stack

Time of First Successful Submission: 2026-02-18 02:08:17

Stack Offsets

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

Program Arguments on the Stack

Time of First Successful Submission: 2026-02-18 02:11:06

Popping From the Stack

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

Disassembling Programs

Time of First Successful Submission: 2026-02-18 02:19:30

Tracing Syscalls

Time of First Successful Submission: 2026-02-17 01:16:53

Starting GDB

Time of First Successful Submission: 2026-02-17 01:20:25

Quitting GDB

Time of First Successful Submission: 2026-02-18 02:21:15

Starting Programs in GDB

Time of First Successful Submission: 2026-02-17 01:27:11

Disassembling in GDB

Time of First Successful Submission: 2026-02-18 02:25:36

Stepping Through Instructions

Time of First Successful Submission: 2026-02-18 02:28:17

Reading Register Values

Time of First Successful Submission: 2026-02-18 02:29:25

Popping Stack Values

Time of First Successful Submission: 2026-02-18 02:30:29

Examining Memory

Time of First Successful Submission: 2026-02-18 02:32:01

Examining Stack Pointers

Time of First Successful Submission: 2026-02-18 02:34:19

Cooperative Debugging

Time of First Successful Submission: 2026-02-18 02:37:42

Writing Output

Time of First Successful Submission: 2026-02-20 00:04:23

Chaining Syscalls

Time of First Successful Submission: 2026-02-20 00:07:57

Writing Strings

Time of First Successful Submission: 2026-02-20 00:11:53

Reading Data

Time of First Successful Submission: 2026-02-20 00:17:38

Opening Files

Time of First Successful Submission: 2026-02-20 00:26:47

Hardcoding the Filename

Time of First Successful Submission: 2026-02-20 00:31:54

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-02-11 15:15:35

Using the VSCode Workspace

Time of First Successful Submission: 2025-07-23 01:19:43

Using the GUI Desktop

Time of First Successful Submission: 2026-02-11 16:36:20

Pasting into the Desktop

Time of First Successful Submission: 2026-02-11 16:43:38

Restarting Challenges

Time of First Successful Submission: 2026-02-11 16:53:34

Challenge Programs

Time of First Successful Submission: 2026-02-11 16:56:11

The Flag File

Time of First Successful Submission: 2026-02-11 17:01:41

Using Privileged Mode

Time of First Successful Submission: 2026-02-11 17:18:02

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-11 17:20:36

Persistent Home Directories - Two

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