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Triple Dereference

Time of First Successful Submission: 2026-02-05 14:08:50


Intro to Programming Languages

15 / 234 7280 / 29895


Commands

Time of First Successful Submission: 2026-01-10 11:00:29

Command Arguments

Time of First Successful Submission: 2026-01-10 11:01:13

Command History

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

The Root Path

Time of First Successful Submission: 2026-01-10 11:19:30

Absolute Paths

Time of First Successful Submission: 2026-01-10 11:20:34

Changing position

Time of First Successful Submission: 2026-01-10 11:29:17

Changing to an Absolute Path

Time of First Successful Submission: 2026-01-10 11:31:33

Relative Paths

Time of First Successful Submission: 2026-01-10 11:34:37

Cat

Time of First Successful Submission: 2026-01-11 10:39:48

Ls

Time of First Successful Submission: 2026-01-11 10:48:43

Ls All

Time of First Successful Submission: 2026-01-11 10:55:49

Find

Time of First Successful Submission: 2026-01-11 11:10:51

Piping Echo

Time of First Successful Submission: 2026-01-13 10:37:43

Piping Stdout

Time of First Successful Submission: 2026-01-13 10:39:34

Piping Stdin

Time of First Successful Submission: 2026-01-13 10:53:00


Start Here

11 / 12 7570 / 40513


Using the Terminal

Time of First Successful Submission: 2026-01-10 08:38:38

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-10 08:40:23

Using the GUI Desktop

Time of First Successful Submission: 2026-01-10 08:42:20

Pasting into the Desktop

Time of First Successful Submission: 2026-01-10 08:44:58

Restarting Challenges

Time of First Successful Submission: 2026-01-10 08:48:56

Challenge Programs

Time of First Successful Submission: 2026-02-15 09:52:48

The Flag File

Time of First Successful Submission: 2026-02-15 09:53:26

Using Privileged Mode

Time of First Successful Submission: 2026-02-15 09:57:31

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-15 09:59:29

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-15 10:00:00


Linux Luminarium

128 / 128 1866 / 30265


Intro to Commands

Time of First Successful Submission: 2026-01-10 11:00:29

Intro to Arguments

Time of First Successful Submission: 2026-01-10 11:01:13

Command History

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

The Root

Time of First Successful Submission: 2026-01-10 11:19:30

Program and absolute paths

Time of First Successful Submission: 2026-01-10 11:20:34

Position thy self

Time of First Successful Submission: 2026-01-10 11:29:17

Position elsewhere

Time of First Successful Submission: 2026-01-10 11:31:33

implicit relative paths, from /

Time of First Successful Submission: 2026-01-10 11:34:37

explicit relative paths, from /

Time of First Successful Submission: 2026-01-10 11:36:03

implicit relative path

Time of First Successful Submission: 2026-01-10 11:37:20

home sweet home

Time of First Successful Submission: 2026-01-10 11:45:42

cat: not the pet, but the command!

Time of First Successful Submission: 2026-01-11 10:39:48

catting absolute paths

Time of First Successful Submission: 2026-01-11 10:41:04

more catting practice

Time of First Successful Submission: 2026-01-11 10:41:54

grepping for a needle in a haystack

Time of First Successful Submission: 2026-01-11 10:43:23

comparing files

Time of First Successful Submission: 2026-01-11 10:47:07

listing files

Time of First Successful Submission: 2026-01-11 10:48:43

touching files

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

removing files

Time of First Successful Submission: 2026-01-11 10:51:29

moving files

Time of First Successful Submission: 2026-01-11 10:53:06

copying files

Time of First Successful Submission: 2026-01-11 10:53:51

hidden files

Time of First Successful Submission: 2026-01-11 10:55:49

An Epic Filesystem Quest

Time of First Successful Submission: 2026-01-11 11:02:29

making directories

Time of First Successful Submission: 2026-01-11 11:05:24

finding files

Time of First Successful Submission: 2026-01-11 11:10:51

linking files

Time of First Successful Submission: 2026-01-12 03:51:08

Learning From Documentation

Time of First Successful Submission: 2026-01-12 04:42:20

Learning Complex Usage

Time of First Successful Submission: 2026-01-12 04:48:37

Reading Manuals

Time of First Successful Submission: 2026-01-12 05:42:50

Searching Manuals

Time of First Successful Submission: 2026-01-12 05:44:10

Searching For Manuals

Time of First Successful Submission: 2026-01-12 06:11:50

Helpful Programs

Time of First Successful Submission: 2026-01-12 06:18:49

Help for Builtins

Time of First Successful Submission: 2026-01-12 07:25:52

Matching with *

Time of First Successful Submission: 2026-01-12 09:22:31

Matching with ?

Time of First Successful Submission: 2026-01-12 09:29:10

Matching with []

Time of First Successful Submission: 2026-01-12 09:38:56

Matching paths with []

Time of First Successful Submission: 2026-01-12 09:45:11

Multiple globs

Time of First Successful Submission: 2026-01-12 09:46:29

Mixing globs

Time of First Successful Submission: 2026-01-12 09:49:50

Exclusionary globbing

Time of First Successful Submission: 2026-01-12 09:57:03

Tab completion

Time of First Successful Submission: 2026-01-12 09:59:16

Multiple options for tab completion

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

Tab completion on commands

Time of First Successful Submission: 2026-01-12 10:10:58

Redirecting output

Time of First Successful Submission: 2026-01-13 10:37:43

Redirecting more output

Time of First Successful Submission: 2026-01-13 10:39:34

Appending output

Time of First Successful Submission: 2026-01-13 10:41:55

Redirecting errors

Time of First Successful Submission: 2026-01-13 10:44:56

Redirecting input

Time of First Successful Submission: 2026-01-13 10:53:00

Grepping stored results

Time of First Successful Submission: 2026-01-13 11:09:51

Grepping live output

Time of First Successful Submission: 2026-01-13 11:12:57

Grepping errors

Time of First Successful Submission: 2026-01-14 03:57:36

Filtering with grep -v

Time of First Successful Submission: 2026-01-14 03:58:44

Filtering with sed

Time of First Successful Submission: 2026-01-14 04:00:34

Duplicating piped data with tee

Time of First Successful Submission: 2026-01-14 10:18:38

Process substitution for input

Time of First Successful Submission: 2026-01-14 10:29:52

Writing to multiple programs

Time of First Successful Submission: 2026-01-14 11:19:25

Split-piping stderr and stdout

Time of First Successful Submission: 2026-01-14 11:44:46

Named pipes

Time of First Successful Submission: 2026-01-14 12:31:22

Printing Variables

Time of First Successful Submission: 2026-01-15 07:23:10

Setting Variables

Time of First Successful Submission: 2026-01-15 08:13:15

Multi-word Variables

Time of First Successful Submission: 2026-01-15 08:14:47

Exporting Variables

Time of First Successful Submission: 2026-01-15 09:16:57

Printing Exported Variables

Time of First Successful Submission: 2026-01-15 09:19:31

Storing Command Output

Time of First Successful Submission: 2026-01-15 10:46:19

Reading Input

Time of First Successful Submission: 2026-01-15 11:02:09

Reading Files

Time of First Successful Submission: 2026-01-15 11:11:58

Translating characters

Time of First Successful Submission: 2026-01-20 07:24:58

Deleting characters

Time of First Successful Submission: 2026-01-20 07:37:08

Deleting newlines

Time of First Successful Submission: 2026-01-20 10:47:09

Extracting the first lines with head

Time of First Successful Submission: 2026-01-20 11:27:01

Extracting specific sections of text

Time of First Successful Submission: 2026-01-20 11:34:10

Sorting data

Time of First Successful Submission: 2026-01-20 11:35:39

Listing Processes

Time of First Successful Submission: 2026-01-20 11:48:09

Killing Processes

Time of First Successful Submission: 2026-01-20 11:50:33

Interrupting Processes

Time of First Successful Submission: 2026-01-20 11:51:17

Killing Misbehaving Processes

Time of First Successful Submission: 2026-01-20 11:53:57

Suspending Processes

Time of First Successful Submission: 2026-01-20 11:56:07

Resuming Processes

Time of First Successful Submission: 2026-01-20 11:57:54

Backgrounding Processes

Time of First Successful Submission: 2026-01-20 12:04:54

Foregrounding Processes

Time of First Successful Submission: 2026-01-20 12:13:13

Starting Backgrounded Processes

Time of First Successful Submission: 2026-01-20 12:20:59

Process Exit Codes

Time of First Successful Submission: 2026-01-20 12:27:20

Becoming root with su

Time of First Successful Submission: 2026-01-20 14:44:57

Other users with su

Time of First Successful Submission: 2026-01-20 14:46:02

Cracking passwords

Time of First Successful Submission: 2026-01-20 14:56:16

Using sudo

Time of First Successful Submission: 2026-01-20 15:00:13

Changing File Ownership

Time of First Successful Submission: 2026-01-22 12:20:31

Groups and Files

Time of First Successful Submission: 2026-01-22 12:25:07

Fun With Groups Names

Time of First Successful Submission: 2026-01-25 14:55:56

Changing Permissions

Time of First Successful Submission: 2026-01-25 15:36:58

Executable Files

Time of First Successful Submission: 2026-01-25 15:40:20

Permission Tweaking Practice

Time of First Successful Submission: 2026-01-25 15:44:59

Permissions Setting Practice

Time of First Successful Submission: 2026-01-27 07:16:59

The SUID Bit

Time of First Successful Submission: 2026-01-27 07:21:44

Chaining with Semicolons

Time of First Successful Submission: 2026-01-27 07:25:03

Building on Success

Time of First Successful Submission: 2026-01-27 11:45:11

Handling Failure

Time of First Successful Submission: 2026-01-27 11:46:08

Your First Shell Script

Time of First Successful Submission: 2026-01-27 11:48:29

Redirecting Script Output

Time of First Successful Submission: 2026-01-27 11:51:19

Executable Shell Scripts

Time of First Successful Submission: 2026-01-27 11:53:17

Understanding Shebangs

Time of First Successful Submission: 2026-01-27 11:58:21

Scripting with Arguments

Time of First Successful Submission: 2026-01-27 12:01:10

Scripting with Conditionals

Time of First Successful Submission: 2026-01-27 12:07:05

Scripting with Default Cases

Time of First Successful Submission: 2026-01-27 12:08:41

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-01-27 12:11:29

Reading Shell Scripts

Time of First Successful Submission: 2026-01-27 12:16:25

Launching Screen

Time of First Successful Submission: 2026-01-28 06:49:25

Detaching and Attaching

Time of First Successful Submission: 2026-01-28 07:10:28

Finding Sessions

Time of First Successful Submission: 2026-01-28 07:12:05

Switching Windows

Time of First Successful Submission: 2026-01-28 07:14:25

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-01-28 07:17:08

Switching Windows (tmux)

Time of First Successful Submission: 2026-01-28 07:20:03

The PATH Variable

Time of First Successful Submission: 2026-01-29 09:53:23

Setting PATH

Time of First Successful Submission: 2026-01-29 10:06:55

Finding Commands

Time of First Successful Submission: 2026-01-29 10:10:12

Adding Commands

Time of First Successful Submission: 2026-01-29 13:24:17

Hijacking Commands

Time of First Successful Submission: 2026-01-29 14:05:24

Bashrc Backdoor

Time of First Successful Submission: 2026-01-29 14:40:07

Sniffing Input

Time of First Successful Submission: 2026-01-29 15:12:52

Overshared Directories

Time of First Successful Submission: 2026-01-29 15:28:34

Tricky Linking

Time of First Successful Submission: 2026-02-01 15:01:04

Sniffing Process Arguments

Time of First Successful Submission: 2026-02-01 15:07:30

Snooping on Configurations

Time of First Successful Submission: 2026-02-01 15:12:12

The Fork Bomb

Time of First Successful Submission: 2026-02-02 07:21:59

Disk-Space Doomsday

Time of First Successful Submission: 2026-02-02 13:14:48

rm -rf /

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

Life after rm -rf /

Time of First Successful Submission: 2026-02-02 13:36:06

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-02-02 13:42:10


Computing 101

94 / 94 34 / 20440


Your First Register

Time of First Successful Submission: 2026-02-04 14:02:05

Your First Syscall

Time of First Successful Submission: 2026-02-04 14:04:55

Exit Codes

Time of First Successful Submission: 2026-02-04 14:07:38

Building Executables

Time of First Successful Submission: 2026-02-04 14:20:25

Moving Between Registers

Time of First Successful Submission: 2026-02-04 14:24:36

Loading From Memory

Time of First Successful Submission: 2026-02-05 13:43:06

More Loading Practice

Time of First Successful Submission: 2026-02-05 13:43:55

Dereferencing Pointers

Time of First Successful Submission: 2026-02-05 13:47:48

Dereferencing Yourself

Time of First Successful Submission: 2026-02-05 13:50:49

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-05 13:57:18

Stored Addresses

Time of First Successful Submission: 2026-02-05 14:02:13

Double Dereference

Time of First Successful Submission: 2026-02-05 14:05:19

The Stack

Time of First Successful Submission: 2026-02-20 11:50:10

Stack Offsets

Time of First Successful Submission: 2026-02-20 11:51:33

Program Arguments on the Stack

Time of First Successful Submission: 2026-02-20 11:53:30

Popping From the Stack

Time of First Successful Submission: 2026-02-20 11:56:27

Disassembling Programs

Time of First Successful Submission: 2026-02-20 12:05:58

Tracing Syscalls

Time of First Successful Submission: 2026-02-05 02:32:48

Starting GDB

Time of First Successful Submission: 2026-02-05 02:33:59

Quitting GDB

Time of First Successful Submission: 2026-02-20 12:07:00

Starting Programs in GDB

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

Disassembling in GDB

Time of First Successful Submission: 2026-02-20 12:08:22

Stepping Through Instructions

Time of First Successful Submission: 2026-02-20 12:09:53

Reading Register Values

Time of First Successful Submission: 2026-02-20 12:11:34

Popping Stack Values

Time of First Successful Submission: 2026-02-20 12:13:08

Examining Memory

Time of First Successful Submission: 2026-02-20 12:15:28

Examining Stack Pointers

Time of First Successful Submission: 2026-02-20 12:18:22

Cooperative Debugging

Time of First Successful Submission: 2026-02-20 12:20:59

Writing Output

Time of First Successful Submission: 2026-02-05 15:05:21

Chaining Syscalls

Time of First Successful Submission: 2026-02-05 15:06:57

Writing Strings

Time of First Successful Submission: 2026-02-05 15:07:34

Reading Data

Time of First Successful Submission: 2026-02-05 15:10:54

Opening Files

Time of First Successful Submission: 2026-02-20 14:30:00

Hardcoding the Filename

Time of First Successful Submission: 2026-02-21 02:48:56

Comparing Values

Time of First Successful Submission: 2026-02-21 13:50:53

Comparing Characters

Time of First Successful Submission: 2026-02-21 14:13:37

Conditional Control Flow

Time of First Successful Submission: 2026-02-21 14:16:54

Comparing Strings

Time of First Successful Submission: 2026-02-21 14:19:57

Reverse the Password

Time of First Successful Submission: 2026-02-21 14:27:09

Conditionals Without Conditionals

Time of First Successful Submission: 2026-02-21 15:39:03

Looping

Time of First Successful Submission: 2026-02-21 15:43:12

Reverse the Calculation

Time of First Successful Submission: 2026-02-21 15:57:38

Reverse the Reverse

Time of First Successful Submission: 2026-02-21 15:59:07

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-02-21 16:03:11

Loops on Data

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

set-register

Time of First Successful Submission: 2026-02-06 14:23:47

set-multiple-registers

Time of First Successful Submission: 2026-02-06 14:33:53

add-to-register

Time of First Successful Submission: 2026-02-06 15:33:27

linear-equation-registers

Time of First Successful Submission: 2026-02-06 15:53:20

integer-division

Time of First Successful Submission: 2026-02-08 12:30:19

modulo-operation

Time of First Successful Submission: 2026-02-08 12:33:32

set-upper-byte

Time of First Successful Submission: 2026-02-08 12:35:35

efficient-modulo

Time of First Successful Submission: 2026-02-08 12:49:58

byte-extraction

Time of First Successful Submission: 2026-02-08 12:58:30

bitwise-and

Time of First Successful Submission: 2026-02-08 13:06:25

check-even

Time of First Successful Submission: 2026-02-08 13:13:39

memory-read

Time of First Successful Submission: 2026-02-09 03:48:00

memory-write

Time of First Successful Submission: 2026-02-09 03:48:56

memory-increment

Time of First Successful Submission: 2026-02-09 05:24:50

byte-access

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

memory-size-access

Time of First Successful Submission: 2026-02-10 05:48:38

little-endian-write

Time of First Successful Submission: 2026-02-10 05:58:17

memory-sum

Time of First Successful Submission: 2026-02-10 10:31:08

stack-subtraction

Time of First Successful Submission: 2026-02-10 10:39:15

swap-stack-values

Time of First Successful Submission: 2026-02-10 10:44:54

average-stack-values

Time of First Successful Submission: 2026-02-10 10:57:55

absolute-jump

Time of First Successful Submission: 2026-02-10 12:08:07

relative-jump

Time of First Successful Submission: 2026-02-10 12:23:42

jump-trampoline

Time of First Successful Submission: 2026-02-10 12:30:34

conditional-jump

Time of First Successful Submission: 2026-02-11 10:56:30

indirect-jump

Time of First Successful Submission: 2026-02-11 12:12:49

average-loop

Time of First Successful Submission: 2026-02-11 13:13:49

count-non-zero

Time of First Successful Submission: 2026-02-11 15:22:28

string-lower

Time of First Successful Submission: 2026-02-12 06:43:58

most-common-byte

Time of First Successful Submission: 2026-02-12 12:08:58

Exit

Time of First Successful Submission: 2026-02-17 11:58:36

Socket

Time of First Successful Submission: 2026-02-17 13:08:15

Bind

Time of First Successful Submission: 2026-02-18 10:37:19

Listen

Time of First Successful Submission: 2026-02-18 10:46:30

Accept

Time of First Successful Submission: 2026-02-18 12:17:05

Static Response

Time of First Successful Submission: 2026-02-18 13:25:45

Dynamic Response

Time of First Successful Submission: 2026-02-19 06:25:26

Iterative GET Server

Time of First Successful Submission: 2026-02-19 06:45:29

Concurrent GET Server

Time of First Successful Submission: 2026-02-19 07:20:36

Concurrent POST Server

Time of First Successful Submission: 2026-02-20 06:36:31

Web Server

Time of First Successful Submission: 2026-02-20 09:27:38

Debugging Programs

Time of First Successful Submission: 2026-02-13 11:53:51

Inspecting Registers

Time of First Successful Submission: 2026-02-13 17:19:51

Examining Memory

Time of First Successful Submission: 2026-02-15 08:12:04

Setting Breakpoints

Time of First Successful Submission: 2026-02-16 06:53:40

GDB Scripting

Time of First Successful Submission: 2026-02-16 10:08:31

Modifying Data

Time of First Successful Submission: 2026-02-16 11:38:50

Modifying Execution

Time of First Successful Submission: 2026-02-16 12:15:42

Broken Functions

Time of First Successful Submission: 2026-02-16 13:40:22


GCA CTF

11 / 104 7676 / 40742


Using the Terminal

Time of First Successful Submission: 2026-01-10 08:38:38

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-10 08:40:23

Using the GUI Desktop

Time of First Successful Submission: 2026-01-10 08:42:20

Pasting into the Desktop

Time of First Successful Submission: 2026-01-10 08:44:58

Restarting Challenges

Time of First Successful Submission: 2026-01-10 08:48:56

Getting Help

Time of First Successful Submission: 2026-01-10 08:52:08

Challenge Programs

Time of First Successful Submission: 2026-02-15 09:52:48

The Flag File

Time of First Successful Submission: 2026-02-15 09:53:26

Using Privileged Mode

Time of First Successful Submission: 2026-02-15 09:57:31

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-15 09:59:29

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-15 10:00:00