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1 / 202 22586 / 22792


Triple Dereference

Time of First Successful Submission: 2026-02-07 08:45:36


Intro to Programming Languages

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Commands

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

Command Arguments

Time of First Successful Submission: 2026-02-05 15:15:52

Command History

Time of First Successful Submission: 2026-02-05 15:16:27

The Root Path

Time of First Successful Submission: 2026-02-05 15:18:45

Absolute Paths

Time of First Successful Submission: 2026-02-05 15:19:18

Changing position

Time of First Successful Submission: 2026-02-05 15:20:33

Changing to an Absolute Path

Time of First Successful Submission: 2026-02-05 15:21:58

Relative Paths

Time of First Successful Submission: 2026-02-05 15:23:15

Cat

Time of First Successful Submission: 2026-02-06 03:21:44

Ls

Time of First Successful Submission: 2026-02-06 03:26:59

Ls All

Time of First Successful Submission: 2026-02-06 03:30:28

Find

Time of First Successful Submission: 2026-02-06 03:51:20

Piping Echo

Time of First Successful Submission: 2026-02-06 12:35:08

Piping Stdout

Time of First Successful Submission: 2026-02-06 12:36:24

Piping Stdin

Time of First Successful Submission: 2026-02-06 12:41:33


Intro to Cybersecurity

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Path Traversal 1

Time of First Successful Submission: 2026-02-07 14:25:46

Path Traversal 2

Time of First Successful Submission: 2026-02-07 14:35:10

CMDi 1

Time of First Successful Submission: 2026-02-07 14:41:50

CMDi 2

Time of First Successful Submission: 2026-02-07 14:47:46

CMDi 3

Time of First Successful Submission: 2026-02-07 14:54:36

CMDi 4

Time of First Successful Submission: 2026-02-07 14:58:56

CMDi 5

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

CMDi 6

Time of First Successful Submission: 2026-02-07 15:06:31

Authentication Bypass 1

Time of First Successful Submission: 2026-02-07 15:12:50

Authentication Bypass 2

Time of First Successful Submission: 2026-02-07 15:21:54

SQLi 1

Time of First Successful Submission: 2026-02-07 15:31:29

SQLi 2

Time of First Successful Submission: 2026-02-07 15:37:58

SQLi 3

Time of First Successful Submission: 2026-02-07 15:42:03

SQLi 4

Time of First Successful Submission: 2026-02-07 15:45:32

SQLi 5

Time of First Successful Submission: 2026-02-07 15:52:05

XSS 1

Time of First Successful Submission: 2026-02-08 08:07:39

XSS 2

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

XSS 3

Time of First Successful Submission: 2026-02-08 08:52:19

XSS 4

Time of First Successful Submission: 2026-02-08 08:57:44

XSS 5

Time of First Successful Submission: 2026-02-08 09:07:35

XSS 6

Time of First Successful Submission: 2026-02-08 09:19:45

XSS 7

Time of First Successful Submission: 2026-02-08 09:30:30


Start Here

12 / 12 1116 / 43337


Using the Terminal

Time of First Successful Submission: 2026-02-05 14:26:20

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-05 14:28:13

Using the GUI Desktop

Time of First Successful Submission: 2026-02-05 14:30:46

Pasting into the Desktop

Time of First Successful Submission: 2026-02-05 15:12:42

Restarting Challenges

Time of First Successful Submission: 2026-02-05 14:38:01

Challenge Programs

Time of First Successful Submission: 2026-02-05 14:44:37

The Flag File

Time of First Successful Submission: 2026-02-05 14:56:59

Using Privileged Mode

Time of First Successful Submission: 2026-02-05 15:03:53

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-05 15:08:18

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-05 15:09:19


Linux Luminarium

128 / 128 1940 / 32379


Intro to Commands

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

Intro to Arguments

Time of First Successful Submission: 2026-02-05 15:15:52

Command History

Time of First Successful Submission: 2026-02-05 15:16:27

The Root

Time of First Successful Submission: 2026-02-05 15:18:45

Program and absolute paths

Time of First Successful Submission: 2026-02-05 15:19:18

Position thy self

Time of First Successful Submission: 2026-02-05 15:20:33

Position elsewhere

Time of First Successful Submission: 2026-02-05 15:21:58

implicit relative paths, from /

Time of First Successful Submission: 2026-02-05 15:23:15

explicit relative paths, from /

Time of First Successful Submission: 2026-02-05 15:24:59

implicit relative path

Time of First Successful Submission: 2026-02-05 15:26:21

home sweet home

Time of First Successful Submission: 2026-02-05 15:27:53

cat: not the pet, but the command!

Time of First Successful Submission: 2026-02-06 03:21:44

catting absolute paths

Time of First Successful Submission: 2026-02-06 03:22:06

more catting practice

Time of First Successful Submission: 2026-02-06 03:22:38

grepping for a needle in a haystack

Time of First Successful Submission: 2026-02-06 03:23:26

comparing files

Time of First Successful Submission: 2026-02-06 03:25:39

listing files

Time of First Successful Submission: 2026-02-06 03:26:59

touching files

Time of First Successful Submission: 2026-02-06 03:28:03

removing files

Time of First Successful Submission: 2026-02-06 03:28:40

moving files

Time of First Successful Submission: 2026-02-06 03:29:25

copying files

Time of First Successful Submission: 2026-02-06 03:29:53

hidden files

Time of First Successful Submission: 2026-02-06 03:30:28

An Epic Filesystem Quest

Time of First Successful Submission: 2026-02-06 03:43:27

making directories

Time of First Successful Submission: 2026-02-06 03:44:27

finding files

Time of First Successful Submission: 2026-02-06 03:51:20

linking files

Time of First Successful Submission: 2026-02-06 03:57:45

Learning From Documentation

Time of First Successful Submission: 2026-02-06 03:59:01

Learning Complex Usage

Time of First Successful Submission: 2026-02-06 04:00:15

Reading Manuals

Time of First Successful Submission: 2026-02-06 04:01:35

Searching Manuals

Time of First Successful Submission: 2026-02-06 04:02:45

Searching For Manuals

Time of First Successful Submission: 2026-02-06 04:12:07

Helpful Programs

Time of First Successful Submission: 2026-02-06 04:19:12

Help for Builtins

Time of First Successful Submission: 2026-02-06 04:20:04

Matching with *

Time of First Successful Submission: 2026-02-06 04:23:00

Matching with ?

Time of First Successful Submission: 2026-02-06 04:24:50

Matching with []

Time of First Successful Submission: 2026-02-06 04:27:07

Matching paths with []

Time of First Successful Submission: 2026-02-06 04:28:33

Multiple globs

Time of First Successful Submission: 2026-02-06 04:30:46

Mixing globs

Time of First Successful Submission: 2026-02-06 04:34:29

Exclusionary globbing

Time of First Successful Submission: 2026-02-06 04:35:48

Tab completion

Time of First Successful Submission: 2026-02-06 04:36:37

Multiple options for tab completion

Time of First Successful Submission: 2026-02-06 04:37:29

Tab completion on commands

Time of First Successful Submission: 2026-02-06 04:38:00

Redirecting output

Time of First Successful Submission: 2026-02-06 12:35:08

Redirecting more output

Time of First Successful Submission: 2026-02-06 12:36:24

Appending output

Time of First Successful Submission: 2026-02-06 12:38:30

Redirecting errors

Time of First Successful Submission: 2026-02-06 12:40:13

Redirecting input

Time of First Successful Submission: 2026-02-06 12:41:33

Grepping stored results

Time of First Successful Submission: 2026-02-06 12:43:14

Grepping live output

Time of First Successful Submission: 2026-02-06 12:43:47

Grepping errors

Time of First Successful Submission: 2026-02-06 12:46:31

Filtering with grep -v

Time of First Successful Submission: 2026-02-06 12:47:14

Filtering with sed

Time of First Successful Submission: 2026-02-06 12:50:59

Duplicating piped data with tee

Time of First Successful Submission: 2026-02-06 12:56:43

Process substitution for input

Time of First Successful Submission: 2026-02-06 12:59:53

Writing to multiple programs

Time of First Successful Submission: 2026-02-06 13:09:28

Split-piping stderr and stdout

Time of First Successful Submission: 2026-02-06 13:10:57

Named pipes

Time of First Successful Submission: 2026-02-06 13:12:44

Printing Variables

Time of First Successful Submission: 2026-02-07 00:01:04

Setting Variables

Time of First Successful Submission: 2026-02-07 00:01:54

Multi-word Variables

Time of First Successful Submission: 2026-02-07 00:02:40

Exporting Variables

Time of First Successful Submission: 2026-02-07 00:06:13

Printing Exported Variables

Time of First Successful Submission: 2026-02-07 00:07:11

Storing Command Output

Time of First Successful Submission: 2026-02-07 00:10:28

Reading Input

Time of First Successful Submission: 2026-02-07 00:12:44

Reading Files

Time of First Successful Submission: 2026-02-07 00:14:29

Translating characters

Time of First Successful Submission: 2026-02-07 00:19:54

Deleting characters

Time of First Successful Submission: 2026-02-07 00:21:59

Deleting newlines

Time of First Successful Submission: 2026-02-07 00:23:58

Extracting the first lines with head

Time of First Successful Submission: 2026-02-07 00:24:47

Extracting specific sections of text

Time of First Successful Submission: 2026-02-07 00:27:39

Sorting data

Time of First Successful Submission: 2026-02-07 00:28:53

Listing Processes

Time of First Successful Submission: 2026-02-07 03:31:38

Killing Processes

Time of First Successful Submission: 2026-02-07 03:29:15

Interrupting Processes

Time of First Successful Submission: 2026-02-07 03:30:03

Killing Misbehaving Processes

Time of First Successful Submission: 2026-02-07 03:35:25

Suspending Processes

Time of First Successful Submission: 2026-02-07 03:36:56

Resuming Processes

Time of First Successful Submission: 2026-02-07 03:37:38

Backgrounding Processes

Time of First Successful Submission: 2026-02-07 03:39:32

Foregrounding Processes

Time of First Successful Submission: 2026-02-07 03:40:31

Starting Backgrounded Processes

Time of First Successful Submission: 2026-02-07 03:42:08

Process Exit Codes

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

Becoming root with su

Time of First Successful Submission: 2026-02-07 03:48:11

Other users with su

Time of First Successful Submission: 2026-02-07 03:49:09

Cracking passwords

Time of First Successful Submission: 2026-02-07 03:54:03

Using sudo

Time of First Successful Submission: 2026-02-07 03:54:40

Changing File Ownership

Time of First Successful Submission: 2026-02-07 03:58:43

Groups and Files

Time of First Successful Submission: 2026-02-07 04:02:29

Fun With Groups Names

Time of First Successful Submission: 2026-02-07 04:03:09

Changing Permissions

Time of First Successful Submission: 2026-02-07 04:11:15

Executable Files

Time of First Successful Submission: 2026-02-07 04:12:26

Permission Tweaking Practice

Time of First Successful Submission: 2026-02-07 04:27:09

Permissions Setting Practice

Time of First Successful Submission: 2026-02-07 04:32:11

The SUID Bit

Time of First Successful Submission: 2026-02-07 04:34:23

Chaining with Semicolons

Time of First Successful Submission: 2026-02-07 04:35:47

Building on Success

Time of First Successful Submission: 2026-02-07 04:36:16

Handling Failure

Time of First Successful Submission: 2026-02-07 04:36:56

Your First Shell Script

Time of First Successful Submission: 2026-02-07 04:43:40

Redirecting Script Output

Time of First Successful Submission: 2026-02-07 05:16:46

Executable Shell Scripts

Time of First Successful Submission: 2026-02-07 05:21:33

Understanding Shebangs

Time of First Successful Submission: 2026-02-07 05:23:57

Scripting with Arguments

Time of First Successful Submission: 2026-02-07 05:26:16

Scripting with Conditionals

Time of First Successful Submission: 2026-02-07 05:30:12

Scripting with Default Cases

Time of First Successful Submission: 2026-02-07 05:31:20

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-02-07 05:35:00

Reading Shell Scripts

Time of First Successful Submission: 2026-02-07 05:40:33

Launching Screen

Time of First Successful Submission: 2026-02-07 05:41:28

Detaching and Attaching

Time of First Successful Submission: 2026-02-07 05:42:30

Finding Sessions

Time of First Successful Submission: 2026-02-07 05:43:35

Switching Windows

Time of First Successful Submission: 2026-02-07 05:44:29

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-02-07 05:45:20

Switching Windows (tmux)

Time of First Successful Submission: 2026-02-07 05:46:10

The PATH Variable

Time of First Successful Submission: 2026-02-07 05:48:25

Setting PATH

Time of First Successful Submission: 2026-02-07 05:49:46

Finding Commands

Time of First Successful Submission: 2026-02-07 05:51:11

Adding Commands

Time of First Successful Submission: 2026-02-07 06:03:59

Hijacking Commands

Time of First Successful Submission: 2026-02-07 06:16:16

Bashrc Backdoor

Time of First Successful Submission: 2026-02-07 06:23:44

Sniffing Input

Time of First Successful Submission: 2026-02-07 06:37:46

Overshared Directories

Time of First Successful Submission: 2026-02-07 06:57:26

Tricky Linking

Time of First Successful Submission: 2026-02-07 07:03:51

Sniffing Process Arguments

Time of First Successful Submission: 2026-02-07 07:10:42

Snooping on Configurations

Time of First Successful Submission: 2026-02-07 07:15:29

The Fork Bomb

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

Disk-Space Doomsday

Time of First Successful Submission: 2026-02-07 07:26:18

rm -rf /

Time of First Successful Submission: 2026-02-07 07:28:43

Life after rm -rf /

Time of First Successful Submission: 2026-02-07 07:32:54

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-02-07 07:37:10


Computing 101

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Your First Register

Time of First Successful Submission: 2026-02-07 07:53:16

Your First Syscall

Time of First Successful Submission: 2026-02-07 07:58:28

Exit Codes

Time of First Successful Submission: 2026-02-07 08:00:36

Building Executables

Time of First Successful Submission: 2026-02-07 08:06:24

Moving Between Registers

Time of First Successful Submission: 2026-02-07 08:09:48

Loading From Memory

Time of First Successful Submission: 2026-02-07 08:23:28

More Loading Practice

Time of First Successful Submission: 2026-02-07 08:24:58

Dereferencing Pointers

Time of First Successful Submission: 2026-02-07 08:26:47

Dereferencing Yourself

Time of First Successful Submission: 2026-02-07 08:28:25

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-07 08:30:24

Stored Addresses

Time of First Successful Submission: 2026-02-07 08:33:17

Double Dereference

Time of First Successful Submission: 2026-02-07 08:41:55

Tracing Syscalls

Time of First Successful Submission: 2026-02-07 08:16:05

Starting GDB

Time of First Successful Submission: 2026-02-07 08:17:15

Starting Programs in GDB

Time of First Successful Submission: 2026-02-07 08:18:00

Writing Output

Time of First Successful Submission: 2026-02-07 08:54:09

Chaining Syscalls

Time of First Successful Submission: 2026-02-07 08:59:09

Writing Strings

Time of First Successful Submission: 2026-02-07 09:02:15

Reading Data

Time of First Successful Submission: 2026-02-07 09:08:30

set-register

Time of First Successful Submission: 2026-02-07 09:16:18

set-multiple-registers

Time of First Successful Submission: 2026-02-07 09:20:48

add-to-register

Time of First Successful Submission: 2026-02-07 09:23:46

linear-equation-registers

Time of First Successful Submission: 2026-02-07 09:27:02

integer-division

Time of First Successful Submission: 2026-02-07 09:30:18

modulo-operation

Time of First Successful Submission: 2026-02-07 09:34:38

set-upper-byte

Time of First Successful Submission: 2026-02-07 09:37:35


GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-02-05 14:26:20

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-05 14:28:13

Using the GUI Desktop

Time of First Successful Submission: 2026-02-05 14:30:46

Pasting into the Desktop

Time of First Successful Submission: 2026-02-05 15:12:42

Connecting over SSH

Time of First Successful Submission: 2026-02-05 14:34:25

Restarting Challenges

Time of First Successful Submission: 2026-02-05 14:38:01

Getting Help

Time of First Successful Submission: 2026-02-05 14:41:53

Challenge Programs

Time of First Successful Submission: 2026-02-05 14:44:37

The Flag File

Time of First Successful Submission: 2026-02-05 14:56:59

Using Privileged Mode

Time of First Successful Submission: 2026-02-05 15:03:53

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-05 15:08:18

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-05 15:09:19