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1 / 202 22636 / 22749

Triple Dereference

Time of First Successful Submission: 2026-02-11 19:42:41

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2025-12-25 23:04:17

Command Arguments

Time of First Successful Submission: 2025-12-25 23:04:57

Command History

Time of First Successful Submission: 2025-12-25 23:05:20

The Root Path

Time of First Successful Submission: 2025-12-27 02:34:05

Absolute Paths

Time of First Successful Submission: 2025-12-27 02:34:28

Changing position

Time of First Successful Submission: 2025-12-27 02:35:37

Changing to an Absolute Path

Time of First Successful Submission: 2025-12-27 02:39:28

Relative Paths

Time of First Successful Submission: 2025-12-27 02:40:19

Cat

Time of First Successful Submission: 2025-12-27 02:43:37

Ls

Time of First Successful Submission: 2025-12-27 02:46:40

Ls All

Time of First Successful Submission: 2025-12-27 03:57:43

Find

Time of First Successful Submission: 2025-12-27 04:12:41

Piping Echo

Time of First Successful Submission: 2025-12-27 07:29:10

Piping Stdout

Time of First Successful Submission: 2025-12-27 07:29:41

Piping Stdin

Time of First Successful Submission: 2025-12-27 07:36:35

Intro to Cybersecurity

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Path Traversal 1

Time of First Successful Submission: 2025-12-22 23:09:41

Path Traversal 2

Time of First Successful Submission: 2025-12-22 23:19:31

CMDi 1

Time of First Successful Submission: 2025-12-25 22:59:20

Start Here

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Using the Terminal

Time of First Successful Submission: 2025-12-22 22:50:00

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2025-12-25 23:04:17

Intro to Arguments

Time of First Successful Submission: 2025-12-25 23:04:57

Command History

Time of First Successful Submission: 2025-12-25 23:05:20

The Root

Time of First Successful Submission: 2025-12-27 02:34:05

Program and absolute paths

Time of First Successful Submission: 2025-12-27 02:34:28

Position thy self

Time of First Successful Submission: 2025-12-27 02:35:37

Position elsewhere

Time of First Successful Submission: 2025-12-27 02:39:28

implicit relative paths, from /

Time of First Successful Submission: 2025-12-27 02:40:19

explicit relative paths, from /

Time of First Successful Submission: 2025-12-27 02:41:52

implicit relative path

Time of First Successful Submission: 2025-12-27 02:42:19

home sweet home

Time of First Successful Submission: 2025-12-27 02:43:05

cat: not the pet, but the command!

Time of First Successful Submission: 2025-12-27 02:43:37

catting absolute paths

Time of First Successful Submission: 2025-12-27 02:43:59

more catting practice

Time of First Successful Submission: 2025-12-27 02:45:18

grepping for a needle in a haystack

Time of First Successful Submission: 2025-12-27 02:45:45

comparing files

Time of First Successful Submission: 2025-12-27 02:46:14

listing files

Time of First Successful Submission: 2025-12-27 02:46:40

touching files

Time of First Successful Submission: 2025-12-27 03:48:32

removing files

Time of First Successful Submission: 2025-12-27 03:48:52

moving files

Time of First Successful Submission: 2025-12-27 03:55:38

copying files

Time of First Successful Submission: 2025-12-27 03:57:08

hidden files

Time of First Successful Submission: 2025-12-27 03:57:43

An Epic Filesystem Quest

Time of First Successful Submission: 2025-12-27 04:06:47

making directories

Time of First Successful Submission: 2025-12-27 04:07:44

finding files

Time of First Successful Submission: 2025-12-27 04:12:41

linking files

Time of First Successful Submission: 2025-12-27 06:34:34

Matching with *

Time of First Successful Submission: 2025-12-27 06:35:58

Matching with ?

Time of First Successful Submission: 2025-12-27 06:39:42

Matching with []

Time of First Successful Submission: 2025-12-27 06:40:40

Matching paths with []

Time of First Successful Submission: 2025-12-27 06:41:14

Multiple globs

Time of First Successful Submission: 2025-12-27 06:41:57

Mixing globs

Time of First Successful Submission: 2025-12-27 06:47:04

Exclusionary globbing

Time of First Successful Submission: 2025-12-27 07:26:24

Tab completion

Time of First Successful Submission: 2025-12-27 07:27:06

Multiple options for tab completion

Time of First Successful Submission: 2025-12-27 07:28:14

Tab completion on commands

Time of First Successful Submission: 2025-12-27 07:28:39

Redirecting output

Time of First Successful Submission: 2025-12-27 07:29:10

Redirecting more output

Time of First Successful Submission: 2025-12-27 07:29:41

Appending output

Time of First Successful Submission: 2025-12-27 07:30:11

Redirecting errors

Time of First Successful Submission: 2025-12-27 07:33:08

Redirecting input

Time of First Successful Submission: 2025-12-27 07:36:35

Grepping stored results

Time of First Successful Submission: 2025-12-27 07:37:25

Grepping live output

Time of First Successful Submission: 2025-12-27 07:37:52

Grepping errors

Time of First Successful Submission: 2025-12-27 07:39:11

Filtering with grep -v

Time of First Successful Submission: 2025-12-27 07:39:48

Filtering with sed

Time of First Successful Submission: 2025-12-27 07:40:36

Duplicating piped data with tee

Time of First Successful Submission: 2025-12-27 07:43:07

Process substitution for input

Time of First Successful Submission: 2025-12-27 07:45:12

Writing to multiple programs

Time of First Successful Submission: 2025-12-27 07:47:35

Split-piping stderr and stdout

Time of First Successful Submission: 2025-12-27 07:48:54

Named pipes

Time of First Successful Submission: 2025-12-27 07:51:04

Printing Variables

Time of First Successful Submission: 2025-12-27 17:47:50

Setting Variables

Time of First Successful Submission: 2025-12-27 17:48:17

Multi-word Variables

Time of First Successful Submission: 2025-12-27 17:48:40

Exporting Variables

Time of First Successful Submission: 2025-12-27 17:59:13

Printing Exported Variables

Time of First Successful Submission: 2025-12-27 17:59:59

Storing Command Output

Time of First Successful Submission: 2025-12-27 18:01:41

Reading Input

Time of First Successful Submission: 2025-12-27 18:05:33

Reading Files

Time of First Successful Submission: 2025-12-27 18:07:11

Translating characters

Time of First Successful Submission: 2025-12-27 18:09:52

Deleting characters

Time of First Successful Submission: 2025-12-27 18:10:27

Deleting newlines

Time of First Successful Submission: 2025-12-27 18:11:12

Extracting the first lines with head

Time of First Successful Submission: 2025-12-27 18:11:47

Extracting specific sections of text

Time of First Successful Submission: 2025-12-27 18:27:54

Sorting data

Time of First Successful Submission: 2025-12-27 18:28:49

Listing Processes

Time of First Successful Submission: 2025-12-27 18:29:53

Killing Processes

Time of First Successful Submission: 2025-12-27 18:30:56

Interrupting Processes

Time of First Successful Submission: 2025-12-27 18:31:15

Killing Misbehaving Processes

Time of First Successful Submission: 2025-12-27 18:32:58

Suspending Processes

Time of First Successful Submission: 2025-12-27 18:33:30

Resuming Processes

Time of First Successful Submission: 2025-12-27 18:53:53

Backgrounding Processes

Time of First Successful Submission: 2025-12-27 19:00:50

Foregrounding Processes

Time of First Successful Submission: 2025-12-27 19:03:12

Starting Backgrounded Processes

Time of First Successful Submission: 2025-12-27 19:05:22

Process Exit Codes

Time of First Successful Submission: 2025-12-27 19:05:57

Becoming root with su

Time of First Successful Submission: 2025-12-27 19:06:45

Other users with su

Time of First Successful Submission: 2025-12-27 19:07:05

Cracking passwords

Time of First Successful Submission: 2025-12-27 19:09:40

Using sudo

Time of First Successful Submission: 2025-12-27 19:09:58

Changing File Ownership

Time of First Successful Submission: 2025-12-27 20:50:03

Groups and Files

Time of First Successful Submission: 2025-12-27 20:50:23

Fun With Groups Names

Time of First Successful Submission: 2025-12-27 20:51:32

Changing Permissions

Time of First Successful Submission: 2025-12-27 20:59:04

Executable Files

Time of First Successful Submission: 2025-12-27 20:59:37

Permission Tweaking Practice

Time of First Successful Submission: 2025-12-27 21:01:39

Permissions Setting Practice

Time of First Successful Submission: 2025-12-27 21:05:19

The SUID Bit

Time of First Successful Submission: 2025-12-27 21:05:47

Chaining with Semicolons

Time of First Successful Submission: 2025-12-27 21:09:08

Building on Success

Time of First Successful Submission: 2025-12-27 21:09:30

Handling Failure

Time of First Successful Submission: 2025-12-27 21:09:47

Your First Shell Script

Time of First Successful Submission: 2025-12-27 21:11:09

Redirecting Script Output

Time of First Successful Submission: 2025-12-27 21:12:14

Executable Shell Scripts

Time of First Successful Submission: 2025-12-27 21:18:36

Understanding Shebangs

Time of First Successful Submission: 2025-12-27 21:19:28

Scripting with Arguments

Time of First Successful Submission: 2025-12-27 21:20:09

Scripting with Conditionals

Time of First Successful Submission: 2025-12-27 21:31:21

Scripting with Default Cases

Time of First Successful Submission: 2025-12-27 21:32:03

Scripting with Multiple Conditions

Time of First Successful Submission: 2025-12-27 21:33:16

Reading Shell Scripts

Time of First Successful Submission: 2025-12-27 21:33:59

Launching Screen

Time of First Successful Submission: 2025-12-27 23:52:17

Detaching and Attaching

Time of First Successful Submission: 2025-12-27 23:52:51

Finding Sessions

Time of First Successful Submission: 2025-12-27 23:53:27

Switching Windows

Time of First Successful Submission: 2025-12-28 04:51:57

Detaching and Attaching (tmux)

Time of First Successful Submission: 2025-12-28 04:54:30

Switching Windows (tmux)

Time of First Successful Submission: 2025-12-28 04:55:03

The PATH Variable

Time of First Successful Submission: 2025-12-28 04:59:50

Setting PATH

Time of First Successful Submission: 2025-12-28 05:00:19

Finding Commands

Time of First Successful Submission: 2025-12-28 05:01:30

Adding Commands

Time of First Successful Submission: 2025-12-28 05:05:39

Hijacking Commands

Time of First Successful Submission: 2025-12-28 05:08:40

Bashrc Backdoor

Time of First Successful Submission: 2025-12-28 04:57:31

Sniffing Input

Time of First Successful Submission: 2025-12-28 05:13:25

Overshared Directories

Time of First Successful Submission: 2025-12-28 05:19:05

Tricky Linking

Time of First Successful Submission: 2025-12-28 05:54:16

Sniffing Process Arguments

Time of First Successful Submission: 2025-12-28 07:37:05

Snooping on Configurations

Time of First Successful Submission: 2025-12-28 07:38:28

The Fork Bomb

Time of First Successful Submission: 2025-12-28 07:49:13

Disk-Space Doomsday

Time of First Successful Submission: 2025-12-28 07:51:02

rm -rf /

Time of First Successful Submission: 2025-12-28 07:52:56

Life after rm -rf /

Time of First Successful Submission: 2025-12-28 08:05:05

Finding meaning after rm -rf /

Time of First Successful Submission: 2025-12-28 08:07:15

Computing 101

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Your First Register

Time of First Successful Submission: 2025-12-28 18:57:21

Your First Syscall

Time of First Successful Submission: 2025-12-28 19:00:10

Exit Codes

Time of First Successful Submission: 2025-12-28 19:00:50

Building Executables

Time of First Successful Submission: 2026-01-05 04:00:24

Moving Between Registers

Time of First Successful Submission: 2026-01-05 04:03:00

Loading From Memory

Time of First Successful Submission: 2026-02-10 07:55:29

More Loading Practice

Time of First Successful Submission: 2026-02-10 07:56:45

Dereferencing Pointers

Time of First Successful Submission: 2026-02-10 07:58:47

Dereferencing Yourself

Time of First Successful Submission: 2026-02-10 07:59:28

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-10 08:00:02

Stored Addresses

Time of First Successful Submission: 2026-02-11 19:39:51

Double Dereference

Time of First Successful Submission: 2026-02-11 19:42:12

The Stack

Time of First Successful Submission: 2026-02-20 07:11:55

Stack Offsets

Time of First Successful Submission: 2026-02-20 08:04:32

Program Arguments on the Stack

Time of First Successful Submission: 2026-02-20 08:05:07

Popping From the Stack

Time of First Successful Submission: 2026-02-20 08:06:12

Disassembling Programs

Time of First Successful Submission: 2026-02-20 08:12:36

Tracing Syscalls

Time of First Successful Submission: 2026-02-10 07:48:55

Starting GDB

Time of First Successful Submission: 2026-02-10 07:49:41

Quitting GDB

Time of First Successful Submission: 2026-02-20 08:06:53

Starting Programs in GDB

Time of First Successful Submission: 2026-02-10 07:50:28

Disassembling in GDB

Time of First Successful Submission: 2026-02-20 08:07:46

Stepping Through Instructions

Time of First Successful Submission: 2026-02-20 08:09:07

Reading Register Values

Time of First Successful Submission: 2026-02-20 08:10:07

Popping Stack Values

Time of First Successful Submission: 2026-02-20 08:11:39

Examining Memory

Time of First Successful Submission: 2026-02-20 08:14:45

Examining Stack Pointers

Time of First Successful Submission: 2026-02-20 08:15:33

Cooperative Debugging

Time of First Successful Submission: 2026-02-20 08:20:16

Writing Output

Time of First Successful Submission: 2026-02-11 19:48:52

Chaining Syscalls

Time of First Successful Submission: 2026-02-11 19:50:19

Writing Strings

Time of First Successful Submission: 2026-02-11 19:50:44

Reading Data

Time of First Successful Submission: 2026-02-11 19:53:47

Opening Files

Time of First Successful Submission: 2026-02-20 08:39:08

Hardcoding the Filename

Time of First Successful Submission: 2026-02-21 02:22:57

Comparing Values

Time of First Successful Submission: 2026-02-21 02:39:34

Comparing Characters

Time of First Successful Submission: 2026-02-21 03:16:53

Conditional Control Flow

Time of First Successful Submission: 2026-02-21 03:18:21

Comparing Strings

Time of First Successful Submission: 2026-02-21 03:24:55

Reverse the Password

Time of First Successful Submission: 2026-02-21 03:27:13

Conditionals Without Conditionals

Time of First Successful Submission: 2026-02-21 03:36:00

Looping

Time of First Successful Submission: 2026-02-21 03:38:15

Reverse the Calculation

Time of First Successful Submission: 2026-02-21 04:48:42

Reverse the Reverse

Time of First Successful Submission: 2026-02-21 04:49:19

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-02-21 04:50:04

Loops on Data

Time of First Successful Submission: 2026-02-21 04:55:13

set-register

Time of First Successful Submission: 2026-02-11 19:58:13

set-multiple-registers

Time of First Successful Submission: 2026-02-11 20:00:06

add-to-register

Time of First Successful Submission: 2026-02-11 20:14:31

linear-equation-registers

Time of First Successful Submission: 2026-02-11 20:15:55

integer-division

Time of First Successful Submission: 2026-02-11 20:21:36

modulo-operation

Time of First Successful Submission: 2026-02-12 19:00:40

set-upper-byte

Time of First Successful Submission: 2026-02-12 19:26:58

efficient-modulo

Time of First Successful Submission: 2026-02-12 19:33:36

byte-extraction

Time of First Successful Submission: 2026-02-12 19:39:35

bitwise-and

Time of First Successful Submission: 2026-02-12 19:44:14

check-even

Time of First Successful Submission: 2026-02-15 07:42:43

memory-read

Time of First Successful Submission: 2026-02-15 07:44:03

memory-write

Time of First Successful Submission: 2026-02-15 07:44:28

memory-increment

Time of First Successful Submission: 2026-02-15 07:48:23

byte-access

Time of First Successful Submission: 2026-02-15 07:49:34

memory-size-access

Time of First Successful Submission: 2026-02-15 07:51:52

little-endian-write

Time of First Successful Submission: 2026-02-15 08:51:20

memory-sum

Time of First Successful Submission: 2026-02-15 08:59:46

stack-subtraction

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

swap-stack-values

Time of First Successful Submission: 2026-02-15 20:17:33

average-stack-values

Time of First Successful Submission: 2026-02-15 20:39:36

absolute-jump

Time of First Successful Submission: 2026-02-15 20:52:23

relative-jump

Time of First Successful Submission: 2026-02-16 01:19:47

jump-trampoline

Time of First Successful Submission: 2026-02-16 02:13:38

conditional-jump

Time of First Successful Submission: 2026-02-16 08:36:22

indirect-jump

Time of First Successful Submission: 2026-02-16 08:52:50

average-loop

Time of First Successful Submission: 2026-02-16 19:17:53

count-non-zero

Time of First Successful Submission: 2026-02-16 19:39:24

string-lower

Time of First Successful Submission: 2026-02-16 20:24:34

most-common-byte

Time of First Successful Submission: 2026-02-17 07:22:10

Exit

Time of First Successful Submission: 2026-02-21 04:59:18

Socket

Time of First Successful Submission: 2026-02-21 05:37:10

Bind

Time of First Successful Submission: 2026-02-21 06:39:42

Listen

Time of First Successful Submission: 2026-02-21 06:57:45

Accept

Time of First Successful Submission: 2026-02-21 07:04:36

Static Response

Time of First Successful Submission: 2026-02-21 07:31:49

Dynamic Response

Time of First Successful Submission: 2026-02-21 21:12:33

Iterative GET Server

Time of First Successful Submission: 2026-02-21 21:27:08

Concurrent GET Server

Time of First Successful Submission: 2026-02-21 21:40:17

Concurrent POST Server

Time of First Successful Submission: 2026-02-22 07:38:40

Web Server

Time of First Successful Submission: 2026-02-22 07:42:09

Debugging Programs

Time of First Successful Submission: 2026-02-17 07:29:05

Inspecting Registers

Time of First Successful Submission: 2026-02-17 07:30:12

Examining Memory

Time of First Successful Submission: 2026-02-18 06:57:43

Setting Breakpoints

Time of First Successful Submission: 2026-02-18 08:39:21

GDB Scripting

Time of First Successful Submission: 2026-02-19 20:14:44

Modifying Data

Time of First Successful Submission: 2026-02-20 06:38:11

Modifying Execution

Time of First Successful Submission: 2026-02-20 06:48:56

Broken Functions

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

Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-02-22 07:45:32

... and again!

Time of First Successful Submission: 2026-02-22 07:45:56

Newline Troubles

Time of First Successful Submission: 2026-02-22 07:54:35

Reasoning about files

Time of First Successful Submission: 2026-02-22 07:58:36

Specifying Filenames

Time of First Successful Submission: 2026-02-22 08:02:10

Binary and Hex Encoding

Time of First Successful Submission: 2026-02-22 08:04:19

More Hex

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

Decoding Hex

Time of First Successful Submission: 2026-02-22 08:44:58

Decoding Practice

Time of First Successful Submission: 2026-02-22 08:52:43

Encoding Practice

Time of First Successful Submission: 2026-02-22 08:59:53

GCA CTF

1 / 104 40293 / 40742

Using the Terminal

Time of First Successful Submission: 2025-12-22 22:50:00

Pwntools Tutorials

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Level 0.0

Time of First Successful Submission: 2025-12-24 18:01:45

Level 1.0

Time of First Successful Submission: 2025-12-24 18:12:16

Level 1.1

Time of First Successful Submission: 2025-12-24 18:20:27

Level 2.0

Time of First Successful Submission: 2025-12-24 18:48:57

Level 2.1

Time of First Successful Submission: 2025-12-24 18:56:28

Level 2.2

Time of First Successful Submission: 2025-12-25 04:46:50

Level 2.3

Time of First Successful Submission: 2025-12-25 04:50:17

Level 2.4

Time of First Successful Submission: 2025-12-25 04:54:39

Level 2.5

Time of First Successful Submission: 2025-12-25 04:57:44

Level 2.6

Time of First Successful Submission: 2025-12-25 04:59:53

Level 3.0

Time of First Successful Submission: 2025-12-25 05:24:30

Level 4.0

Time of First Successful Submission: 2025-12-25 06:06:56