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Triple Dereference

Time of First Successful Submission: 2026-01-11 17:23:13

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-01-06 12:18:38

Command Arguments

Time of First Successful Submission: 2026-01-06 12:19:09

Command History

Time of First Successful Submission: 2026-01-06 12:19:48

The Root Path

Time of First Successful Submission: 2026-01-06 12:20:36

Absolute Paths

Time of First Successful Submission: 2026-01-06 12:21:52

Changing position

Time of First Successful Submission: 2026-01-06 12:22:23

Changing to an Absolute Path

Time of First Successful Submission: 2026-01-06 12:23:48

Relative Paths

Time of First Successful Submission: 2026-01-06 12:24:29

Cat

Time of First Successful Submission: 2026-01-06 12:58:07

Ls

Time of First Successful Submission: 2026-01-06 13:05:21

Ls All

Time of First Successful Submission: 2026-01-06 13:09:09

Find

Time of First Successful Submission: 2026-01-06 13:18:39

Piping Echo

Time of First Successful Submission: 2026-01-06 13:52:26

Piping Stdout

Time of First Successful Submission: 2026-01-06 13:53:17

Piping Stdin

Time of First Successful Submission: 2026-01-06 14:09:42

Start Here

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Using the VSCode Workspace

Time of First Successful Submission: 2025-07-17 15:19:56

Using the GUI Desktop

Time of First Successful Submission: 2025-07-17 15:21:17

Pasting into the Desktop

Time of First Successful Submission: 2025-07-17 15:22:11

Restarting Challenges

Time of First Successful Submission: 2025-07-17 15:24:31

Challenge Programs

Time of First Successful Submission: 2025-07-17 15:29:01

The Flag File

Time of First Successful Submission: 2025-07-17 15:29:53

Using Privileged Mode

Time of First Successful Submission: 2025-07-17 15:35:38

Persistent Home Directories - One

Time of First Successful Submission: 2025-07-17 15:37:26

Persistent Home Directories - Two

Time of First Successful Submission: 2025-07-17 15:38:00

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-01-06 12:18:38

Intro to Arguments

Time of First Successful Submission: 2026-01-06 12:19:09

Command History

Time of First Successful Submission: 2026-01-06 12:19:48

The Root

Time of First Successful Submission: 2026-01-06 12:20:36

Program and absolute paths

Time of First Successful Submission: 2026-01-06 12:21:52

Position thy self

Time of First Successful Submission: 2026-01-06 12:22:23

Position elsewhere

Time of First Successful Submission: 2026-01-06 12:23:48

implicit relative paths, from /

Time of First Successful Submission: 2026-01-06 12:24:29

explicit relative paths, from /

Time of First Successful Submission: 2026-01-06 12:25:04

implicit relative path

Time of First Successful Submission: 2026-01-06 12:25:37

home sweet home

Time of First Successful Submission: 2026-01-06 12:56:54

cat: not the pet, but the command!

Time of First Successful Submission: 2026-01-06 12:58:07

catting absolute paths

Time of First Successful Submission: 2026-01-06 12:58:48

more catting practice

Time of First Successful Submission: 2026-01-06 13:02:08

grepping for a needle in a haystack

Time of First Successful Submission: 2026-01-06 13:03:28

comparing files

Time of First Successful Submission: 2026-01-06 13:04:49

listing files

Time of First Successful Submission: 2026-01-06 13:05:21

touching files

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

removing files

Time of First Successful Submission: 2026-01-06 13:06:36

moving files

Time of First Successful Submission: 2026-01-06 13:07:18

copying files

Time of First Successful Submission: 2026-01-06 13:08:45

hidden files

Time of First Successful Submission: 2026-01-06 13:09:09

An Epic Filesystem Quest

Time of First Successful Submission: 2026-01-06 13:11:50

making directories

Time of First Successful Submission: 2026-01-06 13:14:26

finding files

Time of First Successful Submission: 2026-01-06 13:18:39

linking files

Time of First Successful Submission: 2026-01-06 13:20:02

Learning From Documentation

Time of First Successful Submission: 2026-01-06 13:20:44

Learning Complex Usage

Time of First Successful Submission: 2026-01-06 13:21:40

Reading Manuals

Time of First Successful Submission: 2026-01-06 13:29:06

Searching Manuals

Time of First Successful Submission: 2026-01-06 13:32:04

Searching For Manuals

Time of First Successful Submission: 2026-01-06 13:35:17

Helpful Programs

Time of First Successful Submission: 2026-01-06 13:36:20

Help for Builtins

Time of First Successful Submission: 2026-01-06 13:36:56

Matching with *

Time of First Successful Submission: 2026-01-06 13:39:26

Matching with ?

Time of First Successful Submission: 2026-01-06 13:40:17

Matching with []

Time of First Successful Submission: 2026-01-06 13:41:17

Matching paths with []

Time of First Successful Submission: 2026-01-06 13:42:23

Multiple globs

Time of First Successful Submission: 2026-01-06 13:43:31

Mixing globs

Time of First Successful Submission: 2026-01-06 13:44:31

Exclusionary globbing

Time of First Successful Submission: 2026-01-06 13:45:13

Tab completion

Time of First Successful Submission: 2026-01-06 13:46:20

Multiple options for tab completion

Time of First Successful Submission: 2026-01-06 13:47:37

Tab completion on commands

Time of First Successful Submission: 2026-01-06 13:48:12

Redirecting output

Time of First Successful Submission: 2026-01-06 13:52:26

Redirecting more output

Time of First Successful Submission: 2026-01-06 13:53:17

Appending output

Time of First Successful Submission: 2026-01-06 14:06:37

Redirecting errors

Time of First Successful Submission: 2026-01-06 14:07:37

Redirecting input

Time of First Successful Submission: 2026-01-06 14:09:42

Grepping stored results

Time of First Successful Submission: 2026-01-06 14:13:45

Grepping live output

Time of First Successful Submission: 2026-01-06 14:14:15

Grepping errors

Time of First Successful Submission: 2026-01-06 14:15:27

Filtering with grep -v

Time of First Successful Submission: 2026-01-06 14:16:01

Filtering with sed

Time of First Successful Submission: 2026-01-06 14:17:03

Duplicating piped data with tee

Time of First Successful Submission: 2026-01-06 14:20:15

Process substitution for input

Time of First Successful Submission: 2026-01-06 14:21:39

Writing to multiple programs

Time of First Successful Submission: 2026-01-06 14:24:42

Split-piping stderr and stdout

Time of First Successful Submission: 2026-01-06 14:27:14

Named pipes

Time of First Successful Submission: 2026-01-09 14:07:24

Printing Variables

Time of First Successful Submission: 2026-01-09 14:08:14

Setting Variables

Time of First Successful Submission: 2026-01-09 14:10:50

Multi-word Variables

Time of First Successful Submission: 2026-01-09 14:11:35

Exporting Variables

Time of First Successful Submission: 2026-01-09 14:49:45

Printing Exported Variables

Time of First Successful Submission: 2026-01-09 14:50:17

Storing Command Output

Time of First Successful Submission: 2026-01-09 14:53:27

Reading Input

Time of First Successful Submission: 2026-01-09 15:23:09

Reading Files

Time of First Successful Submission: 2026-01-09 15:30:53

Translating characters

Time of First Successful Submission: 2026-01-09 15:33:57

Deleting characters

Time of First Successful Submission: 2026-01-09 15:35:51

Deleting newlines

Time of First Successful Submission: 2026-01-09 15:36:30

Extracting the first lines with head

Time of First Successful Submission: 2026-01-09 15:37:19

Extracting specific sections of text

Time of First Successful Submission: 2026-01-09 15:54:55

Sorting data

Time of First Successful Submission: 2026-01-09 15:55:40

Listing Processes

Time of First Successful Submission: 2026-01-09 16:35:02

Killing Processes

Time of First Successful Submission: 2026-01-09 16:36:34

Interrupting Processes

Time of First Successful Submission: 2026-01-09 16:37:31

Killing Misbehaving Processes

Time of First Successful Submission: 2026-01-09 16:42:22

Suspending Processes

Time of First Successful Submission: 2026-01-09 16:43:05

Resuming Processes

Time of First Successful Submission: 2026-01-09 16:59:58

Backgrounding Processes

Time of First Successful Submission: 2026-01-09 17:07:23

Foregrounding Processes

Time of First Successful Submission: 2026-01-09 17:09:47

Starting Backgrounded Processes

Time of First Successful Submission: 2026-01-09 17:10:08

Process Exit Codes

Time of First Successful Submission: 2026-01-09 17:10:46

Becoming root with su

Time of First Successful Submission: 2026-01-09 17:12:12

Other users with su

Time of First Successful Submission: 2026-01-09 17:13:12

Cracking passwords

Time of First Successful Submission: 2026-01-09 17:15:39

Using sudo

Time of First Successful Submission: 2026-01-09 17:17:15

Changing File Ownership

Time of First Successful Submission: 2026-01-09 17:19:12

Groups and Files

Time of First Successful Submission: 2026-01-09 17:20:42

Fun With Groups Names

Time of First Successful Submission: 2026-01-09 17:22:25

Changing Permissions

Time of First Successful Submission: 2026-01-09 17:23:29

Executable Files

Time of First Successful Submission: 2026-01-09 17:25:45

Permission Tweaking Practice

Time of First Successful Submission: 2026-01-09 17:32:57

Permissions Setting Practice

Time of First Successful Submission: 2026-01-09 17:52:09

The SUID Bit

Time of First Successful Submission: 2026-01-09 17:52:57

Chaining with Semicolons

Time of First Successful Submission: 2026-01-09 17:54:17

Building on Success

Time of First Successful Submission: 2026-01-09 18:05:48

Handling Failure

Time of First Successful Submission: 2026-01-09 18:06:55

Your First Shell Script

Time of First Successful Submission: 2026-01-09 18:08:11

Redirecting Script Output

Time of First Successful Submission: 2026-01-09 18:12:32

Executable Shell Scripts

Time of First Successful Submission: 2026-01-09 18:13:53

Understanding Shebangs

Time of First Successful Submission: 2026-01-09 18:17:10

Scripting with Arguments

Time of First Successful Submission: 2026-01-09 18:18:23

Scripting with Conditionals

Time of First Successful Submission: 2026-01-09 18:22:12

Scripting with Default Cases

Time of First Successful Submission: 2026-01-09 18:23:03

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-01-09 18:36:36

Reading Shell Scripts

Time of First Successful Submission: 2026-01-09 18:37:21

Launching Screen

Time of First Successful Submission: 2026-01-09 18:41:50

Detaching and Attaching

Time of First Successful Submission: 2026-01-09 19:27:20

Finding Sessions

Time of First Successful Submission: 2026-01-09 19:28:26

Switching Windows

Time of First Successful Submission: 2026-01-09 19:29:40

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-01-09 19:36:07

Switching Windows (tmux)

Time of First Successful Submission: 2026-01-09 19:38:34

The PATH Variable

Time of First Successful Submission: 2026-01-10 11:48:33

Setting PATH

Time of First Successful Submission: 2026-01-10 11:49:44

Finding Commands

Time of First Successful Submission: 2026-01-10 11:50:59

Adding Commands

Time of First Successful Submission: 2026-01-10 11:59:14

Hijacking Commands

Time of First Successful Submission: 2026-01-10 12:00:02

Bashrc Backdoor

Time of First Successful Submission: 2026-01-10 12:08:25

Sniffing Input

Time of First Successful Submission: 2026-01-10 12:25:40

Overshared Directories

Time of First Successful Submission: 2026-01-10 12:31:46

Tricky Linking

Time of First Successful Submission: 2026-01-10 12:44:07

Sniffing Process Arguments

Time of First Successful Submission: 2026-01-10 12:45:25

Snooping on Configurations

Time of First Successful Submission: 2026-01-10 12:49:32

The Fork Bomb

Time of First Successful Submission: 2026-01-10 13:00:02

Disk-Space Doomsday

Time of First Successful Submission: 2026-01-10 13:04:54

rm -rf /

Time of First Successful Submission: 2026-01-10 13:08:08

Life after rm -rf /

Time of First Successful Submission: 2026-01-10 14:05:10

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-01-10 14:10:03

Computing 101

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Your First Register

Time of First Successful Submission: 2025-07-26 09:27:22

Your First Syscall

Time of First Successful Submission: 2025-07-26 09:33:04

Exit Codes

Time of First Successful Submission: 2025-07-26 09:40:11

Building Executables

Time of First Successful Submission: 2025-07-26 10:01:39

Moving Between Registers

Time of First Successful Submission: 2025-07-26 10:11:55

Loading From Memory

Time of First Successful Submission: 2026-01-10 16:34:50

More Loading Practice

Time of First Successful Submission: 2026-01-10 17:36:17

Dereferencing Pointers

Time of First Successful Submission: 2026-01-10 17:43:04

Dereferencing Yourself

Time of First Successful Submission: 2026-01-10 18:35:10

Dereferencing with Offsets

Time of First Successful Submission: 2026-01-11 17:06:01

Stored Addresses

Time of First Successful Submission: 2026-01-11 17:13:51

Double Dereference

Time of First Successful Submission: 2026-01-11 17:20:12

Tracing Syscalls

Time of First Successful Submission: 2025-07-26 11:46:14

Starting GDB

Time of First Successful Submission: 2025-07-26 12:06:42

Starting Programs in GDB

Time of First Successful Submission: 2025-07-26 12:15:59

Writing Output

Time of First Successful Submission: 2026-01-11 17:49:38

Chaining Syscalls

Time of First Successful Submission: 2026-01-11 18:54:16

Writing Strings

Time of First Successful Submission: 2026-01-11 18:55:58

Reading Data

Time of First Successful Submission: 2026-01-11 19:01:27

set-register

Time of First Successful Submission: 2026-01-11 19:24:31

set-multiple-registers

Time of First Successful Submission: 2026-01-11 19:40:24

add-to-register

Time of First Successful Submission: 2026-01-11 19:43:15

linear-equation-registers

Time of First Successful Submission: 2026-01-11 20:22:10

integer-division

Time of First Successful Submission: 2026-01-11 20:34:50

modulo-operation

Time of First Successful Submission: 2026-01-11 20:42:43

set-upper-byte

Time of First Successful Submission: 2026-01-11 20:44:17

efficient-modulo

Time of First Successful Submission: 2026-01-11 20:58:30

byte-extraction

Time of First Successful Submission: 2026-01-11 21:01:09

bitwise-and

Time of First Successful Submission: 2026-01-11 21:04:26

check-even

Time of First Successful Submission: 2026-01-11 21:09:34

memory-read

Time of First Successful Submission: 2026-01-11 21:16:25

memory-write

Time of First Successful Submission: 2026-01-16 15:56:25

memory-increment

Time of First Successful Submission: 2026-01-16 16:08:34

byte-access

Time of First Successful Submission: 2026-01-16 16:24:18

memory-size-access

Time of First Successful Submission: 2026-01-16 16:29:08

little-endian-write

Time of First Successful Submission: 2026-01-16 17:02:21

memory-sum

Time of First Successful Submission: 2026-01-16 17:28:21

stack-subtraction

Time of First Successful Submission: 2026-01-16 17:42:37

swap-stack-values

Time of First Successful Submission: 2026-01-16 17:43:41

average-stack-values

Time of First Successful Submission: 2026-01-16 17:45:43

absolute-jump

Time of First Successful Submission: 2026-01-16 18:42:27

relative-jump

Time of First Successful Submission: 2026-01-16 19:20:17

jump-trampoline

Time of First Successful Submission: 2026-01-16 21:01:54

conditional-jump

Time of First Successful Submission: 2026-01-16 21:46:36

indirect-jump

Time of First Successful Submission: 2026-01-16 22:14:09

average-loop

Time of First Successful Submission: 2026-01-16 22:36:52

count-non-zero

Time of First Successful Submission: 2026-01-17 10:45:45

string-lower

Time of First Successful Submission: 2026-01-18 14:00:25

most-common-byte

Time of First Successful Submission: 2026-01-19 10:51:24

Playing With Programs

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What's the password?

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

UTF Mixups

Time of First Successful Submission: 2026-01-09 21:30:04

Modifying Encoded Data

Time of First Successful Submission: 2026-01-09 21:32:20

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-01-09 20:57:27

GCA CTF

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Using the VSCode Workspace

Time of First Successful Submission: 2025-07-17 15:19:56

Using the GUI Desktop

Time of First Successful Submission: 2025-07-17 15:21:17

Pasting into the Desktop

Time of First Successful Submission: 2025-07-17 15:22:11

Restarting Challenges

Time of First Successful Submission: 2025-07-17 15:24:31

Getting Help

Time of First Successful Submission: 2025-07-17 15:27:48

Challenge Programs

Time of First Successful Submission: 2025-07-17 15:29:01

The Flag File

Time of First Successful Submission: 2025-07-17 15:29:53

Using Privileged Mode

Time of First Successful Submission: 2025-07-17 15:35:38

Persistent Home Directories - One

Time of First Successful Submission: 2025-07-17 15:37:26

Persistent Home Directories - Two

Time of First Successful Submission: 2025-07-17 15:38:00