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Triple Dereference

Time of First Successful Submission: 2025-12-01 15:43:58


Intro to Programming Languages

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Commands

Time of First Successful Submission: 2025-11-25 16:09:27

Command Arguments

Time of First Successful Submission: 2025-11-25 16:10:21

Command History

Time of First Successful Submission: 2025-11-25 16:11:10

The Root Path

Time of First Successful Submission: 2025-11-25 16:14:08

Absolute Paths

Time of First Successful Submission: 2025-11-25 16:15:42

Changing position

Time of First Successful Submission: 2025-11-25 16:18:37

Changing to an Absolute Path

Time of First Successful Submission: 2025-11-25 16:25:22

Relative Paths

Time of First Successful Submission: 2025-11-25 16:30:19

Cat

Time of First Successful Submission: 2025-11-25 18:00:29

Ls

Time of First Successful Submission: 2025-11-25 18:15:15

Ls All

Time of First Successful Submission: 2025-11-25 18:30:39

Find

Time of First Successful Submission: 2025-11-25 19:02:32

Piping Echo

Time of First Successful Submission: 2025-11-26 09:49:41

Piping Stdout

Time of First Successful Submission: 2025-11-26 09:53:01

Piping Stdin

Time of First Successful Submission: 2025-11-26 09:59:14


Start Here

12 / 12 191 / 43238


Using the Terminal

Time of First Successful Submission: 2025-11-25 14:48:36

Using the VSCode Workspace

Time of First Successful Submission: 2025-11-25 14:51:06

Using the GUI Desktop

Time of First Successful Submission: 2025-11-25 14:54:45

Pasting into the Desktop

Time of First Successful Submission: 2025-11-25 14:57:26

Restarting Challenges

Time of First Successful Submission: 2025-11-25 15:20:42

Challenge Programs

Time of First Successful Submission: 2025-11-25 15:28:07

The Flag File

Time of First Successful Submission: 2025-11-25 15:29:48

Using Privileged Mode

Time of First Successful Submission: 2025-11-25 15:35:42

Persistent Home Directories - One

Time of First Successful Submission: 2025-11-25 15:56:50

Persistent Home Directories - Two

Time of First Successful Submission: 2025-11-25 15:58:01


Linux Luminarium

128 / 128 627 / 32329


Intro to Commands

Time of First Successful Submission: 2025-11-25 16:09:27

Intro to Arguments

Time of First Successful Submission: 2025-11-25 16:10:21

Command History

Time of First Successful Submission: 2025-11-25 16:11:10

The Root

Time of First Successful Submission: 2025-11-25 16:14:08

Program and absolute paths

Time of First Successful Submission: 2025-11-25 16:15:42

Position thy self

Time of First Successful Submission: 2025-11-25 16:18:37

Position elsewhere

Time of First Successful Submission: 2025-11-25 16:25:22

implicit relative paths, from /

Time of First Successful Submission: 2025-11-25 16:30:19

explicit relative paths, from /

Time of First Successful Submission: 2025-11-25 16:37:08

implicit relative path

Time of First Successful Submission: 2025-11-25 16:38:59

home sweet home

Time of First Successful Submission: 2025-11-25 17:58:58

cat: not the pet, but the command!

Time of First Successful Submission: 2025-11-25 18:00:29

catting absolute paths

Time of First Successful Submission: 2025-11-25 18:01:22

more catting practice

Time of First Successful Submission: 2025-11-25 18:03:08

grepping for a needle in a haystack

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

comparing files

Time of First Successful Submission: 2025-11-25 18:13:58

listing files

Time of First Successful Submission: 2025-11-25 18:15:15

touching files

Time of First Successful Submission: 2025-11-25 18:16:39

removing files

Time of First Successful Submission: 2025-11-25 18:17:38

moving files

Time of First Successful Submission: 2025-11-25 18:19:45

copying files

Time of First Successful Submission: 2025-11-25 18:20:46

hidden files

Time of First Successful Submission: 2025-11-25 18:30:39

An Epic Filesystem Quest

Time of First Successful Submission: 2025-11-25 18:47:50

making directories

Time of First Successful Submission: 2025-11-25 18:49:58

finding files

Time of First Successful Submission: 2025-11-25 19:02:32

linking files

Time of First Successful Submission: 2025-11-25 19:13:35

Learning From Documentation

Time of First Successful Submission: 2025-11-26 05:32:16

Learning Complex Usage

Time of First Successful Submission: 2025-11-26 05:36:28

Reading Manuals

Time of First Successful Submission: 2025-11-26 05:38:57

Searching Manuals

Time of First Successful Submission: 2025-11-26 05:41:40

Searching For Manuals

Time of First Successful Submission: 2025-11-26 06:07:29

Helpful Programs

Time of First Successful Submission: 2025-11-26 06:09:04

Help for Builtins

Time of First Successful Submission: 2025-11-26 06:10:31

Matching with *

Time of First Successful Submission: 2025-11-26 06:13:53

Matching with ?

Time of First Successful Submission: 2025-11-26 06:18:00

Matching with []

Time of First Successful Submission: 2025-11-26 06:19:24

Matching paths with []

Time of First Successful Submission: 2025-11-26 06:22:10

Multiple globs

Time of First Successful Submission: 2025-11-26 06:33:33

Mixing globs

Time of First Successful Submission: 2025-11-26 06:55:18

Exclusionary globbing

Time of First Successful Submission: 2025-11-26 08:58:50

Tab completion

Time of First Successful Submission: 2025-11-26 09:00:04

Multiple options for tab completion

Time of First Successful Submission: 2025-11-26 09:04:30

Tab completion on commands

Time of First Successful Submission: 2025-11-26 09:06:07

Redirecting output

Time of First Successful Submission: 2025-11-26 09:49:41

Redirecting more output

Time of First Successful Submission: 2025-11-26 09:53:01

Appending output

Time of First Successful Submission: 2025-11-26 09:55:41

Redirecting errors

Time of First Successful Submission: 2025-11-26 09:57:36

Redirecting input

Time of First Successful Submission: 2025-11-26 09:59:14

Grepping stored results

Time of First Successful Submission: 2025-11-26 10:01:33

Grepping live output

Time of First Successful Submission: 2025-11-26 10:02:41

Grepping errors

Time of First Successful Submission: 2025-11-26 10:04:21

Filtering with grep -v

Time of First Successful Submission: 2025-11-26 10:05:44

Filtering with sed

Time of First Successful Submission: 2025-11-26 10:07:37

Duplicating piped data with tee

Time of First Successful Submission: 2025-11-26 12:35:46

Process substitution for input

Time of First Successful Submission: 2025-11-26 12:39:38

Writing to multiple programs

Time of First Successful Submission: 2025-11-26 13:20:46

Split-piping stderr and stdout

Time of First Successful Submission: 2025-11-26 13:23:21

Named pipes

Time of First Successful Submission: 2025-11-26 13:34:44

Printing Variables

Time of First Successful Submission: 2025-11-27 10:40:20

Setting Variables

Time of First Successful Submission: 2025-11-27 10:41:28

Multi-word Variables

Time of First Successful Submission: 2025-11-27 10:42:21

Exporting Variables

Time of First Successful Submission: 2025-11-27 10:43:59

Printing Exported Variables

Time of First Successful Submission: 2025-11-27 10:44:40

Storing Command Output

Time of First Successful Submission: 2025-11-27 10:45:55

Reading Input

Time of First Successful Submission: 2025-11-27 10:47:33

Reading Files

Time of First Successful Submission: 2025-11-27 10:49:15

Translating characters

Time of First Successful Submission: 2025-11-27 15:28:35

Deleting characters

Time of First Successful Submission: 2025-11-27 15:29:31

Deleting newlines

Time of First Successful Submission: 2025-11-27 15:31:05

Extracting the first lines with head

Time of First Successful Submission: 2025-11-27 15:32:02

Extracting specific sections of text

Time of First Successful Submission: 2025-11-27 16:04:09

Sorting data

Time of First Successful Submission: 2025-11-27 16:05:22

Listing Processes

Time of First Successful Submission: 2025-11-27 16:10:10

Killing Processes

Time of First Successful Submission: 2025-11-27 16:13:05

Interrupting Processes

Time of First Successful Submission: 2025-11-27 16:13:39

Killing Misbehaving Processes

Time of First Successful Submission: 2025-11-27 16:16:01

Suspending Processes

Time of First Successful Submission: 2025-11-27 16:16:48

Resuming Processes

Time of First Successful Submission: 2025-11-27 16:17:31

Backgrounding Processes

Time of First Successful Submission: 2025-11-27 16:19:09

Foregrounding Processes

Time of First Successful Submission: 2025-11-27 16:19:53

Starting Backgrounded Processes

Time of First Successful Submission: 2025-11-27 16:20:20

Process Exit Codes

Time of First Successful Submission: 2025-11-27 16:22:10

Becoming root with su

Time of First Successful Submission: 2025-11-27 16:53:57

Other users with su

Time of First Successful Submission: 2025-11-27 16:54:47

Cracking passwords

Time of First Successful Submission: 2025-11-27 16:58:12

Using sudo

Time of First Successful Submission: 2025-11-27 17:00:04

Changing File Ownership

Time of First Successful Submission: 2025-11-27 17:17:58

Groups and Files

Time of First Successful Submission: 2025-11-27 17:20:19

Fun With Groups Names

Time of First Successful Submission: 2025-11-27 17:21:33

Changing Permissions

Time of First Successful Submission: 2025-11-27 17:24:25

Executable Files

Time of First Successful Submission: 2025-11-27 17:28:15

Permission Tweaking Practice

Time of First Successful Submission: 2025-11-27 17:39:05

Permissions Setting Practice

Time of First Successful Submission: 2025-11-27 17:56:31

The SUID Bit

Time of First Successful Submission: 2025-11-27 18:01:06

Chaining with Semicolons

Time of First Successful Submission: 2025-11-28 16:51:42

Building on Success

Time of First Successful Submission: 2025-11-28 16:52:54

Handling Failure

Time of First Successful Submission: 2025-11-28 16:53:30

Your First Shell Script

Time of First Successful Submission: 2025-11-28 17:01:48

Redirecting Script Output

Time of First Successful Submission: 2025-11-28 17:07:12

Executable Shell Scripts

Time of First Successful Submission: 2025-11-28 17:08:59

Understanding Shebangs

Time of First Successful Submission: 2025-11-28 17:13:20

Scripting with Arguments

Time of First Successful Submission: 2025-11-28 17:15:33

Scripting with Conditionals

Time of First Successful Submission: 2025-11-28 17:17:48

Scripting with Default Cases

Time of First Successful Submission: 2025-11-28 17:23:15

Scripting with Multiple Conditions

Time of First Successful Submission: 2025-11-28 17:29:14

Reading Shell Scripts

Time of First Successful Submission: 2025-11-28 17:31:32

Launching Screen

Time of First Successful Submission: 2025-11-29 11:46:50

Detaching and Attaching

Time of First Successful Submission: 2025-11-29 11:48:33

Finding Sessions

Time of First Successful Submission: 2025-11-29 11:50:18

Switching Windows

Time of First Successful Submission: 2025-11-29 11:50:59

Detaching and Attaching (tmux)

Time of First Successful Submission: 2025-11-29 11:57:12

Switching Windows (tmux)

Time of First Successful Submission: 2025-11-29 11:57:51

The PATH Variable

Time of First Successful Submission: 2025-11-29 11:59:04

Setting PATH

Time of First Successful Submission: 2025-11-29 12:00:05

Finding Commands

Time of First Successful Submission: 2025-11-29 12:01:24

Adding Commands

Time of First Successful Submission: 2025-11-29 12:13:37

Hijacking Commands

Time of First Successful Submission: 2025-11-29 12:16:17

Bashrc Backdoor

Time of First Successful Submission: 2025-11-29 12:27:51

Sniffing Input

Time of First Successful Submission: 2025-11-29 13:47:04

Overshared Directories

Time of First Successful Submission: 2025-11-29 13:53:05

Tricky Linking

Time of First Successful Submission: 2025-11-29 13:58:40

Sniffing Process Arguments

Time of First Successful Submission: 2025-11-29 14:03:26

Snooping on Configurations

Time of First Successful Submission: 2025-11-29 14:05:37

The Fork Bomb

Time of First Successful Submission: 2025-11-29 14:52:47

Disk-Space Doomsday

Time of First Successful Submission: 2025-11-29 15:12:07

rm -rf /

Time of First Successful Submission: 2025-11-30 09:01:37

Life after rm -rf /

Time of First Successful Submission: 2025-11-30 09:13:12

Finding meaning after rm -rf /

Time of First Successful Submission: 2025-11-30 09:16:55


Computing 101

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Your First Register

Time of First Successful Submission: 2025-11-30 12:00:31

Your First Syscall

Time of First Successful Submission: 2025-11-30 12:03:10

Exit Codes

Time of First Successful Submission: 2025-11-30 12:06:43

Building Executables

Time of First Successful Submission: 2025-11-30 12:17:30

Moving Between Registers

Time of First Successful Submission: 2025-11-30 12:20:21

Loading From Memory

Time of First Successful Submission: 2025-12-01 14:46:37

More Loading Practice

Time of First Successful Submission: 2025-12-01 15:26:36

Dereferencing Pointers

Time of First Successful Submission: 2025-12-01 15:30:18

Dereferencing Yourself

Time of First Successful Submission: 2025-12-01 15:31:38

Dereferencing with Offsets

Time of First Successful Submission: 2025-12-01 15:32:55

Stored Addresses

Time of First Successful Submission: 2025-12-01 15:34:41

Double Dereference

Time of First Successful Submission: 2025-12-01 15:37:48

Tracing Syscalls

Time of First Successful Submission: 2025-12-01 13:49:14

Starting GDB

Time of First Successful Submission: 2025-12-01 13:50:11

Starting Programs in GDB

Time of First Successful Submission: 2025-12-01 13:51:57

Writing Output

Time of First Successful Submission: 2025-12-01 16:52:14

Chaining Syscalls

Time of First Successful Submission: 2025-12-01 16:53:36

Writing Strings

Time of First Successful Submission: 2025-12-01 17:02:45

Reading Data

Time of First Successful Submission: 2025-12-01 17:10:07


GCA CTF

12 / 104 494 / 43515


Using the Terminal

Time of First Successful Submission: 2025-11-25 14:48:36

Using the VSCode Workspace

Time of First Successful Submission: 2025-11-25 14:51:06

Using the GUI Desktop

Time of First Successful Submission: 2025-11-25 14:54:45

Pasting into the Desktop

Time of First Successful Submission: 2025-11-25 14:57:26

Connecting over SSH

Time of First Successful Submission: 2025-11-25 15:19:12

Restarting Challenges

Time of First Successful Submission: 2025-11-25 15:20:42

Getting Help

Time of First Successful Submission: 2025-11-25 15:24:31

Challenge Programs

Time of First Successful Submission: 2025-11-25 15:28:07

The Flag File

Time of First Successful Submission: 2025-11-25 15:29:48

Using Privileged Mode

Time of First Successful Submission: 2025-11-25 15:35:42

Persistent Home Directories - One

Time of First Successful Submission: 2025-11-25 15:56:50

Persistent Home Directories - Two

Time of First Successful Submission: 2025-11-25 15:58:01