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Triple Dereference

Time of First Successful Submission: 2026-02-09 02:16:31

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-01-18 15:37:11

Command Arguments

Time of First Successful Submission: 2026-01-18 15:46:39

Command History

Time of First Successful Submission: 2026-01-18 15:48:50

The Root Path

Time of First Successful Submission: 2026-01-18 15:58:48

Absolute Paths

Time of First Successful Submission: 2026-01-18 16:00:03

Changing position

Time of First Successful Submission: 2026-01-18 16:08:30

Changing to an Absolute Path

Time of First Successful Submission: 2026-01-19 01:21:51

Relative Paths

Time of First Successful Submission: 2026-01-19 01:48:52

Cat

Time of First Successful Submission: 2026-01-19 02:50:19

Ls

Time of First Successful Submission: 2026-01-19 03:32:42

Ls All

Time of First Successful Submission: 2026-01-19 03:43:50

Find

Time of First Successful Submission: 2026-01-19 04:02:11

Piping Echo

Time of First Successful Submission: 2026-01-22 08:40:08

Piping Stdout

Time of First Successful Submission: 2026-01-28 04:21:10

Piping Stdin

Time of First Successful Submission: 2026-01-30 14:49:24

Start Here

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Using the Terminal

Time of First Successful Submission: 2026-01-18 08:20:59

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-18 08:23:40

Using the GUI Desktop

Time of First Successful Submission: 2026-01-18 08:46:04

Pasting into the Desktop

Time of First Successful Submission: 2026-01-18 08:47:29

Restarting Challenges

Time of First Successful Submission: 2026-01-18 08:51:00

Challenge Programs

Time of First Successful Submission: 2026-01-18 12:15:08

The Flag File

Time of First Successful Submission: 2026-01-18 12:24:18

Using Privileged Mode

Time of First Successful Submission: 2026-01-18 12:31:09

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-18 12:39:57

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-18 12:41:37

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-01-18 15:37:11

Intro to Arguments

Time of First Successful Submission: 2026-01-18 15:46:39

Command History

Time of First Successful Submission: 2026-01-18 15:48:50

The Root

Time of First Successful Submission: 2026-01-18 15:58:48

Program and absolute paths

Time of First Successful Submission: 2026-01-18 16:00:03

Position thy self

Time of First Successful Submission: 2026-01-18 16:08:30

Position elsewhere

Time of First Successful Submission: 2026-01-19 01:21:51

implicit relative paths, from /

Time of First Successful Submission: 2026-01-19 01:48:52

explicit relative paths, from /

Time of First Successful Submission: 2026-01-19 01:54:15

implicit relative path

Time of First Successful Submission: 2026-01-19 02:16:54

home sweet home

Time of First Successful Submission: 2026-01-19 02:21:34

cat: not the pet, but the command!

Time of First Successful Submission: 2026-01-19 02:50:19

catting absolute paths

Time of First Successful Submission: 2026-01-19 02:52:42

more catting practice

Time of First Successful Submission: 2026-01-19 02:54:08

grepping for a needle in a haystack

Time of First Successful Submission: 2026-01-19 02:56:16

comparing files

Time of First Successful Submission: 2026-01-19 03:01:00

listing files

Time of First Successful Submission: 2026-01-19 03:32:42

touching files

Time of First Successful Submission: 2026-01-19 03:33:48

removing files

Time of First Successful Submission: 2026-01-19 03:36:45

moving files

Time of First Successful Submission: 2026-01-19 03:39:24

copying files

Time of First Successful Submission: 2026-01-19 03:42:18

hidden files

Time of First Successful Submission: 2026-01-19 03:43:50

An Epic Filesystem Quest

Time of First Successful Submission: 2026-01-19 03:51:27

making directories

Time of First Successful Submission: 2026-01-19 03:53:35

finding files

Time of First Successful Submission: 2026-01-19 04:02:11

linking files

Time of First Successful Submission: 2026-01-19 04:20:13

Learning From Documentation

Time of First Successful Submission: 2026-01-19 06:18:12

Learning Complex Usage

Time of First Successful Submission: 2026-01-19 06:33:53

Reading Manuals

Time of First Successful Submission: 2026-01-19 06:59:14

Searching Manuals

Time of First Successful Submission: 2026-01-19 15:16:49

Searching For Manuals

Time of First Successful Submission: 2026-01-19 15:29:01

Helpful Programs

Time of First Successful Submission: 2026-01-19 16:01:13

Help for Builtins

Time of First Successful Submission: 2026-01-19 16:05:09

Matching with *

Time of First Successful Submission: 2026-01-20 05:37:03

Matching with ?

Time of First Successful Submission: 2026-01-22 06:42:11

Matching with []

Time of First Successful Submission: 2026-01-22 06:46:57

Matching paths with []

Time of First Successful Submission: 2026-01-22 06:51:56

Multiple globs

Time of First Successful Submission: 2026-01-22 06:58:15

Mixing globs

Time of First Successful Submission: 2026-01-22 07:11:17

Exclusionary globbing

Time of First Successful Submission: 2026-01-22 07:13:39

Tab completion

Time of First Successful Submission: 2026-01-22 07:19:23

Multiple options for tab completion

Time of First Successful Submission: 2026-01-22 07:23:00

Tab completion on commands

Time of First Successful Submission: 2026-01-22 07:29:48

Redirecting output

Time of First Successful Submission: 2026-01-22 08:40:08

Redirecting more output

Time of First Successful Submission: 2026-01-28 04:21:10

Appending output

Time of First Successful Submission: 2026-01-30 06:07:54

Redirecting errors

Time of First Successful Submission: 2026-01-30 14:23:22

Redirecting input

Time of First Successful Submission: 2026-01-30 14:49:24

Grepping stored results

Time of First Successful Submission: 2026-01-30 14:52:18

Grepping live output

Time of First Successful Submission: 2026-01-30 16:08:03

Grepping errors

Time of First Successful Submission: 2026-01-30 16:10:56

Filtering with grep -v

Time of First Successful Submission: 2026-01-30 16:12:31

Filtering with sed

Time of First Successful Submission: 2026-01-30 16:17:03

Duplicating piped data with tee

Time of First Successful Submission: 2026-01-30 16:22:45

Process substitution for input

Time of First Successful Submission: 2026-01-30 16:59:27

Writing to multiple programs

Time of First Successful Submission: 2026-01-31 02:20:25

Split-piping stderr and stdout

Time of First Successful Submission: 2026-01-31 03:02:23

Named pipes

Time of First Successful Submission: 2026-01-31 03:25:16

Printing Variables

Time of First Successful Submission: 2026-02-01 14:58:46

Setting Variables

Time of First Successful Submission: 2026-02-01 15:22:53

Multi-word Variables

Time of First Successful Submission: 2026-02-01 15:26:33

Exporting Variables

Time of First Successful Submission: 2026-02-01 15:48:41

Printing Exported Variables

Time of First Successful Submission: 2026-02-01 15:49:58

Storing Command Output

Time of First Successful Submission: 2026-02-01 15:58:20

Reading Input

Time of First Successful Submission: 2026-02-01 16:26:40

Reading Files

Time of First Successful Submission: 2026-02-01 16:32:07

Translating characters

Time of First Successful Submission: 2026-02-01 16:45:20

Deleting characters

Time of First Successful Submission: 2026-02-01 16:50:13

Deleting newlines

Time of First Successful Submission: 2026-02-01 16:53:18

Extracting the first lines with head

Time of First Successful Submission: 2026-02-01 16:55:21

Extracting specific sections of text

Time of First Successful Submission: 2026-02-01 16:59:08

Sorting data

Time of First Successful Submission: 2026-02-01 17:01:55

Listing Processes

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

Killing Processes

Time of First Successful Submission: 2026-02-02 03:26:36

Interrupting Processes

Time of First Successful Submission: 2026-02-02 03:29:17

Killing Misbehaving Processes

Time of First Successful Submission: 2026-02-02 03:37:55

Suspending Processes

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

Resuming Processes

Time of First Successful Submission: 2026-02-02 03:48:42

Backgrounding Processes

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

Foregrounding Processes

Time of First Successful Submission: 2026-02-02 05:03:51

Starting Backgrounded Processes

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

Process Exit Codes

Time of First Successful Submission: 2026-02-02 06:49:20

Becoming root with su

Time of First Successful Submission: 2026-02-02 06:56:09

Other users with su

Time of First Successful Submission: 2026-02-02 06:57:01

Cracking passwords

Time of First Successful Submission: 2026-02-02 08:15:02

Using sudo

Time of First Successful Submission: 2026-02-02 08:26:46

Changing File Ownership

Time of First Successful Submission: 2026-02-02 15:25:27

Groups and Files

Time of First Successful Submission: 2026-02-02 15:39:56

Fun With Groups Names

Time of First Successful Submission: 2026-02-02 15:41:07

Changing Permissions

Time of First Successful Submission: 2026-02-02 15:56:25

Executable Files

Time of First Successful Submission: 2026-02-02 16:01:45

Permission Tweaking Practice

Time of First Successful Submission: 2026-02-02 16:08:50

Permissions Setting Practice

Time of First Successful Submission: 2026-02-02 16:21:48

The SUID Bit

Time of First Successful Submission: 2026-02-02 16:30:10

Chaining with Semicolons

Time of First Successful Submission: 2026-02-05 11:43:24

Building on Success

Time of First Successful Submission: 2026-02-05 12:49:22

Handling Failure

Time of First Successful Submission: 2026-02-05 14:42:15

Your First Shell Script

Time of First Successful Submission: 2026-02-05 15:15:38

Redirecting Script Output

Time of First Successful Submission: 2026-02-05 15:49:13

Executable Shell Scripts

Time of First Successful Submission: 2026-02-05 16:00:09

Understanding Shebangs

Time of First Successful Submission: 2026-02-05 16:07:21

Scripting with Arguments

Time of First Successful Submission: 2026-02-05 16:21:58

Scripting with Conditionals

Time of First Successful Submission: 2026-02-05 16:29:03

Scripting with Default Cases

Time of First Successful Submission: 2026-02-05 16:31:50

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-02-05 16:36:02

Reading Shell Scripts

Time of First Successful Submission: 2026-02-05 16:40:39

Launching Screen

Time of First Successful Submission: 2026-02-06 02:36:28

Detaching and Attaching

Time of First Successful Submission: 2026-02-06 02:39:00

Finding Sessions

Time of First Successful Submission: 2026-02-06 04:34:31

Switching Windows

Time of First Successful Submission: 2026-02-06 04:38:17

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-02-06 04:40:16

Switching Windows (tmux)

Time of First Successful Submission: 2026-02-06 04:42:50

The PATH Variable

Time of First Successful Submission: 2026-02-06 04:47:53

Setting PATH

Time of First Successful Submission: 2026-02-06 04:53:33

Finding Commands

Time of First Successful Submission: 2026-02-06 04:56:03

Adding Commands

Time of First Successful Submission: 2026-02-06 05:50:41

Hijacking Commands

Time of First Successful Submission: 2026-02-06 06:35:46

Bashrc Backdoor

Time of First Successful Submission: 2026-02-06 06:51:16

Sniffing Input

Time of First Successful Submission: 2026-02-06 07:38:20

Overshared Directories

Time of First Successful Submission: 2026-02-06 07:55:00

Tricky Linking

Time of First Successful Submission: 2026-02-06 08:32:49

Sniffing Process Arguments

Time of First Successful Submission: 2026-02-06 10:01:03

Snooping on Configurations

Time of First Successful Submission: 2026-02-06 13:59:10

The Fork Bomb

Time of First Successful Submission: 2026-02-07 04:05:45

Disk-Space Doomsday

Time of First Successful Submission: 2026-02-07 04:45:38

rm -rf /

Time of First Successful Submission: 2026-02-07 07:10:41

Life after rm -rf /

Time of First Successful Submission: 2026-02-07 07:42:51

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-02-07 08:06:53

Computing 101

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Your First Register

Time of First Successful Submission: 2026-02-07 08:34:19

Your First Syscall

Time of First Successful Submission: 2026-02-08 04:14:12

Exit Codes

Time of First Successful Submission: 2026-02-08 04:24:48

Building Executables

Time of First Successful Submission: 2026-02-08 04:31:51

Moving Between Registers

Time of First Successful Submission: 2026-02-08 04:37:54

Loading From Memory

Time of First Successful Submission: 2026-02-08 05:12:48

More Loading Practice

Time of First Successful Submission: 2026-02-08 05:14:16

Dereferencing Pointers

Time of First Successful Submission: 2026-02-08 05:25:28

Dereferencing Yourself

Time of First Successful Submission: 2026-02-08 05:31:22

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-09 01:45:40

Stored Addresses

Time of First Successful Submission: 2026-02-09 02:02:59

Double Dereference

Time of First Successful Submission: 2026-02-09 02:10:15

The Stack

Time of First Successful Submission: 2026-02-18 04:53:10

Stack Offsets

Time of First Successful Submission: 2026-02-18 05:00:13

Program Arguments on the Stack

Time of First Successful Submission: 2026-02-18 05:05:22

Popping From the Stack

Time of First Successful Submission: 2026-02-18 05:16:31

Disassembling Programs

Time of First Successful Submission: 2026-02-18 05:22:28

Tracing Syscalls

Time of First Successful Submission: 2026-02-08 04:46:25

Starting GDB

Time of First Successful Submission: 2026-02-08 04:50:35

Quitting GDB

Time of First Successful Submission: 2026-02-18 06:53:18

Starting Programs in GDB

Time of First Successful Submission: 2026-02-08 05:00:41

Disassembling in GDB

Time of First Successful Submission: 2026-02-18 07:04:39

Stepping Through Instructions

Time of First Successful Submission: 2026-02-18 07:11:44

Reading Register Values

Time of First Successful Submission: 2026-02-18 07:14:16

Popping Stack Values

Time of First Successful Submission: 2026-02-18 07:16:40

Examining Memory

Time of First Successful Submission: 2026-02-18 07:24:11

Examining Stack Pointers

Time of First Successful Submission: 2026-02-18 07:29:52

Cooperative Debugging

Time of First Successful Submission: 2026-02-18 07:35:23

Writing Output

Time of First Successful Submission: 2026-02-09 03:56:29

Chaining Syscalls

Time of First Successful Submission: 2026-02-09 04:42:37

Writing Strings

Time of First Successful Submission: 2026-02-09 04:43:42

Reading Data

Time of First Successful Submission: 2026-02-09 04:51:19

Opening Files

Time of First Successful Submission: 2026-02-18 09:35:07

Hardcoding the Filename

Time of First Successful Submission: 2026-02-18 09:45:35

Comparing Values

Time of First Successful Submission: 2026-02-18 10:32:18

Comparing Characters

Time of First Successful Submission: 2026-02-18 10:41:18

Conditional Control Flow

Time of First Successful Submission: 2026-02-18 10:52:19

Comparing Strings

Time of First Successful Submission: 2026-02-18 11:00:15

Reverse the Password

Time of First Successful Submission: 2026-02-18 11:20:47

Conditionals Without Conditionals

Time of First Successful Submission: 2026-02-18 15:35:45

Looping

Time of First Successful Submission: 2026-02-18 16:06:33

set-register

Time of First Successful Submission: 2026-02-09 05:04:21

set-multiple-registers

Time of First Successful Submission: 2026-02-09 05:07:08

add-to-register

Time of First Successful Submission: 2026-02-09 05:15:41

linear-equation-registers

Time of First Successful Submission: 2026-02-09 05:27:37

integer-division

Time of First Successful Submission: 2026-02-09 05:44:10

modulo-operation

Time of First Successful Submission: 2026-02-09 07:50:22

set-upper-byte

Time of First Successful Submission: 2026-02-09 07:59:55

efficient-modulo

Time of First Successful Submission: 2026-02-09 08:20:01

byte-extraction

Time of First Successful Submission: 2026-02-09 09:17:40

bitwise-and

Time of First Successful Submission: 2026-02-09 09:36:13

check-even

Time of First Successful Submission: 2026-02-09 10:16:32

memory-read

Time of First Successful Submission: 2026-02-09 10:24:22

memory-write

Time of First Successful Submission: 2026-02-10 03:51:38

memory-increment

Time of First Successful Submission: 2026-02-10 04:01:40

byte-access

Time of First Successful Submission: 2026-02-10 04:27:23

memory-size-access

Time of First Successful Submission: 2026-02-10 05:02:30

little-endian-write

Time of First Successful Submission: 2026-02-10 05:17:11

memory-sum

Time of First Successful Submission: 2026-02-10 05:55:37

stack-subtraction

Time of First Successful Submission: 2026-02-10 06:03:27

swap-stack-values

Time of First Successful Submission: 2026-02-10 06:08:21

average-stack-values

Time of First Successful Submission: 2026-02-10 06:15:40

absolute-jump

Time of First Successful Submission: 2026-02-10 07:25:45

relative-jump

Time of First Successful Submission: 2026-02-10 08:46:16

jump-trampoline

Time of First Successful Submission: 2026-02-10 09:01:58

conditional-jump

Time of First Successful Submission: 2026-02-10 14:19:29

indirect-jump

Time of First Successful Submission: 2026-02-10 15:42:03

average-loop

Time of First Successful Submission: 2026-02-10 16:12:48

count-non-zero

Time of First Successful Submission: 2026-02-13 12:35:36

string-lower

Time of First Successful Submission: 2026-02-18 16:31:34

most-common-byte

Time of First Successful Submission: 2026-02-18 16:41:34

Exit

Time of First Successful Submission: 2026-02-18 16:50:06

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-01-18 08:20:59

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-18 08:23:40

Using the GUI Desktop

Time of First Successful Submission: 2026-01-18 08:46:04

Pasting into the Desktop

Time of First Successful Submission: 2026-01-18 08:47:29

Connecting over SSH

Time of First Successful Submission: 2026-01-19 01:00:55

Restarting Challenges

Time of First Successful Submission: 2026-01-18 08:51:00

Getting Help

Time of First Successful Submission: 2026-01-18 08:53:40

Challenge Programs

Time of First Successful Submission: 2026-01-18 12:15:08

The Flag File

Time of First Successful Submission: 2026-01-18 12:24:18

Using Privileged Mode

Time of First Successful Submission: 2026-01-18 12:31:09

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-18 12:39:57

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-18 12:41:37