d3l3t3

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Intro to Programming Languages

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Commands

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Command Arguments

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Command History

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The Root Path

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Absolute Paths

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Changing position

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Changing to an Absolute Path

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Relative Paths

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Cat

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Ls

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Ls All

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Find

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Piping Echo

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Piping Stdout

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Piping Stdin

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Intro to Cybersecurity

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Path Traversal 1

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Connect

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Send

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Shutdown

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Listen

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Scan 1

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Scan 2

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Monitor 1

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Monitor 2

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Your First Overflow (easy)

Time of First Successful Submission: 2025-12-13 14:22:19

Your First Overflow (hard)

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Precision (easy)

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Precision (hard)

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Variable Control (easy)

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Control Hijack (easy)

Time of First Successful Submission: 2025-12-13 19:41:38

Program Security

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ello ackers!

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Start Here

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Using the Terminal

Time of First Successful Submission: 2025-12-06 10:48:20

Using the VSCode Workspace

Time of First Successful Submission: 2025-12-06 10:50:16

Using the GUI Desktop

Time of First Successful Submission: 2025-12-06 10:52:13

Pasting into the Desktop

Time of First Successful Submission: 2025-12-06 10:54:25

Restarting Challenges

Time of First Successful Submission: 2025-12-06 11:05:44

Challenge Programs

Time of First Successful Submission: 2025-12-06 11:45:16

The Flag File

Time of First Successful Submission: 2025-12-06 11:47:05

Using Privileged Mode

Time of First Successful Submission: 2025-12-06 11:52:28

Persistent Home Directories - One

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Persistent Home Directories - Two

Time of First Successful Submission: 2025-12-06 12:28:09

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2025-12-06 12:32:22

Intro to Arguments

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Command History

Time of First Successful Submission: 2025-12-06 12:34:48

The Root

Time of First Successful Submission: 2025-12-06 12:54:53

Program and absolute paths

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Position thy self

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Position elsewhere

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implicit relative paths, from /

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explicit relative paths, from /

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implicit relative path

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home sweet home

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cat: not the pet, but the command!

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catting absolute paths

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more catting practice

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grepping for a needle in a haystack

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comparing files

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listing files

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touching files

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removing files

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moving files

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copying files

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hidden files

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An Epic Filesystem Quest

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making directories

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finding files

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linking files

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Learning From Documentation

Time of First Successful Submission: 2025-12-12 20:41:41

Learning Complex Usage

Time of First Successful Submission: 2025-12-12 20:43:22

Reading Manuals

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Searching Manuals

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Searching For Manuals

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Helpful Programs

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Help for Builtins

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Matching with *

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Matching with ?

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Matching with []

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Matching paths with []

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Multiple globs

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Mixing globs

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Exclusionary globbing

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Tab completion

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Multiple options for tab completion

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Tab completion on commands

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Redirecting output

Time of First Successful Submission: 2025-12-21 21:09:56

Redirecting more output

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Appending output

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Redirecting errors

Time of First Successful Submission: 2025-12-21 21:18:55

Redirecting input

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Grepping stored results

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Grepping live output

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Grepping errors

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Filtering with grep -v

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Filtering with sed

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Duplicating piped data with tee

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Process substitution for input

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

Writing to multiple programs

Time of First Successful Submission: 2025-12-21 21:55:35

Split-piping stderr and stdout

Time of First Successful Submission: 2025-12-21 22:07:22

Named pipes

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Printing Variables

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Setting Variables

Time of First Successful Submission: 2025-12-21 22:17:32

Multi-word Variables

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Exporting Variables

Time of First Successful Submission: 2025-12-23 17:47:40

Printing Exported Variables

Time of First Successful Submission: 2025-12-23 17:48:17

Storing Command Output

Time of First Successful Submission: 2025-12-23 17:50:29

Reading Input

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Reading Files

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Translating characters

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Deleting characters

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Deleting newlines

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Extracting the first lines with head

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Extracting specific sections of text

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Sorting data

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Listing Processes

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Killing Processes

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Interrupting Processes

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Killing Misbehaving Processes

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Suspending Processes

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Resuming Processes

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Backgrounding Processes

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Foregrounding Processes

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Starting Backgrounded Processes

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Process Exit Codes

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Becoming root with su

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Other users with su

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Cracking passwords

Time of First Successful Submission: 2025-12-23 19:33:58

Using sudo

Time of First Successful Submission: 2025-12-23 19:36:12

Changing File Ownership

Time of First Successful Submission: 2025-12-23 20:15:49

Groups and Files

Time of First Successful Submission: 2025-12-23 20:20:00

Fun With Groups Names

Time of First Successful Submission: 2025-12-23 20:21:28

Changing Permissions

Time of First Successful Submission: 2025-12-23 20:26:04

Executable Files

Time of First Successful Submission: 2025-12-23 20:28:10

Permission Tweaking Practice

Time of First Successful Submission: 2025-12-23 20:33:32

Permissions Setting Practice

Time of First Successful Submission: 2025-12-23 20:37:56

The SUID Bit

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Chaining with Semicolons

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Building on Success

Time of First Successful Submission: 2025-12-23 20:43:31

Handling Failure

Time of First Successful Submission: 2025-12-23 20:44:40

Your First Shell Script

Time of First Successful Submission: 2025-12-23 20:47:20

Redirecting Script Output

Time of First Successful Submission: 2025-12-23 20:48:52

Executable Shell Scripts

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

Understanding Shebangs

Time of First Successful Submission: 2025-12-23 20:53:54

Scripting with Arguments

Time of First Successful Submission: 2025-12-23 20:57:13

Scripting with Conditionals

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Scripting with Default Cases

Time of First Successful Submission: 2025-12-23 21:02:01

Scripting with Multiple Conditions

Time of First Successful Submission: 2025-12-23 21:06:37

Reading Shell Scripts

Time of First Successful Submission: 2025-12-23 21:07:35

Launching Screen

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Detaching and Attaching

Time of First Successful Submission: 2025-12-23 21:11:57

Finding Sessions

Time of First Successful Submission: 2025-12-23 21:14:06

Switching Windows

Time of First Successful Submission: 2025-12-23 21:15:41

Detaching and Attaching (tmux)

Time of First Successful Submission: 2025-12-23 21:17:01

Switching Windows (tmux)

Time of First Successful Submission: 2025-12-23 21:19:47

The PATH Variable

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Setting PATH

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Finding Commands

Time of First Successful Submission: 2025-12-23 21:28:10

Adding Commands

Time of First Successful Submission: 2025-12-23 21:36:05

Hijacking Commands

Time of First Successful Submission: 2025-12-23 21:39:54

Bashrc Backdoor

Time of First Successful Submission: 2025-12-23 21:52:01

Sniffing Input

Time of First Successful Submission: 2025-12-23 22:12:33

Overshared Directories

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Tricky Linking

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Sniffing Process Arguments

Time of First Successful Submission: 2025-12-23 22:39:28

Snooping on Configurations

Time of First Successful Submission: 2025-12-23 22:41:58

The Fork Bomb

Time of First Successful Submission: 2025-12-23 23:01:49

Disk-Space Doomsday

Time of First Successful Submission: 2025-12-23 23:08:12

rm -rf /

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Life after rm -rf /

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Finding meaning after rm -rf /

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Computing 101

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Your First Register

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Your First Syscall

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Exit Codes

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Building Executables

Time of First Successful Submission: 2025-12-08 12:43:31

Moving Between Registers

Time of First Successful Submission: 2025-12-08 13:16:24

Tracing Syscalls

Time of First Successful Submission: 2025-12-08 15:12:43

Starting GDB

Time of First Successful Submission: 2025-12-08 15:14:57

Starting Programs in GDB

Time of First Successful Submission: 2025-12-08 15:16:54

Loading From Memory

Time of First Successful Submission: 2025-12-08 15:45:13

More Loading Practice

Time of First Successful Submission: 2025-12-08 15:47:23

Dereferencing Pointers

Time of First Successful Submission: 2025-12-08 17:35:47

Dereferencing Yourself

Time of First Successful Submission: 2025-12-08 17:42:01

Dereferencing with Offsets

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Stored Addresses

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Double Dereference

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Triple Dereference

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Writing Output

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

Chaining Syscalls

Time of First Successful Submission: 2025-12-08 21:29:07

Writing Strings

Time of First Successful Submission: 2025-12-08 21:30:34

Reading Data

Time of First Successful Submission: 2025-12-08 21:36:33

set-register

Time of First Successful Submission: 2025-12-08 21:44:11

set-multiple-registers

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add-to-register

Time of First Successful Submission: 2025-12-09 18:40:04

linear-equation-registers

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integer-division

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modulo-operation

Time of First Successful Submission: 2025-12-09 19:36:52

set-upper-byte

Time of First Successful Submission: 2025-12-09 19:41:30

efficient-modulo

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

byte-extraction

Time of First Successful Submission: 2025-12-12 21:31:02

bitwise-and

Time of First Successful Submission: 2025-12-12 21:55:38

check-even

Time of First Successful Submission: 2025-12-27 21:04:01

memory-read

Time of First Successful Submission: 2025-12-13 08:13:09

memory-write

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memory-increment

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byte-access

Time of First Successful Submission: 2025-12-13 08:59:05

memory-size-access

Time of First Successful Submission: 2025-12-13 09:03:00

little-endian-write

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memory-sum

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stack-subtraction

Time of First Successful Submission: 2025-12-13 09:40:04

swap-stack-values

Time of First Successful Submission: 2025-12-13 09:42:39

average-stack-values

Time of First Successful Submission: 2025-12-13 10:03:08

absolute-jump

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relative-jump

Time of First Successful Submission: 2025-12-13 10:33:20

jump-trampoline

Time of First Successful Submission: 2025-12-13 10:36:57

conditional-jump

Time of First Successful Submission: 2025-12-28 22:37:41

indirect-jump

Time of First Successful Submission: 2025-12-28 22:51:24

average-loop

Time of First Successful Submission: 2025-12-29 20:26:11

count-non-zero

Time of First Successful Submission: 2025-12-29 20:45:48

string-lower

Time of First Successful Submission: 2026-02-03 21:42:33

Debugging Programs

Time of First Successful Submission: 2025-12-13 10:48:32

Inspecting Registers

Time of First Successful Submission: 2025-12-13 10:56:08

Examining Memory

Time of First Successful Submission: 2025-12-13 11:40:24

Playing With Programs

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What's the password?

Time of First Successful Submission: 2025-12-15 09:46:07

... and again!

Time of First Successful Submission: 2025-12-15 09:47:23

Newline Troubles

Time of First Successful Submission: 2025-12-15 09:49:17

Reasoning about files

Time of First Successful Submission: 2025-12-15 09:54:43

Specifying Filenames

Time of First Successful Submission: 2025-12-15 09:58:36

Binary and Hex Encoding

Time of First Successful Submission: 2025-12-15 10:09:59

More Hex

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Decoding Hex

Time of First Successful Submission: 2025-12-15 10:18:19

Decoding Practice

Time of First Successful Submission: 2026-01-03 05:27:35

Encoding Practice

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Hex-encoding ASCII

Time of First Successful Submission: 2026-01-03 05:59:14

Nested Encoding

Time of First Successful Submission: 2026-01-03 06:03:42

Hex-encoding UTF-8

Time of First Successful Submission: 2026-01-03 07:33:08

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2025-12-06 10:48:20

Using the VSCode Workspace

Time of First Successful Submission: 2025-12-06 10:50:16

Using the GUI Desktop

Time of First Successful Submission: 2025-12-06 10:52:13

Pasting into the Desktop

Time of First Successful Submission: 2025-12-06 10:54:25

Connecting over SSH

Time of First Successful Submission: 2025-12-06 11:02:31

Restarting Challenges

Time of First Successful Submission: 2025-12-06 11:05:44

Getting Help

Time of First Successful Submission: 2025-12-06 11:41:32

Challenge Programs

Time of First Successful Submission: 2025-12-06 11:45:16

The Flag File

Time of First Successful Submission: 2025-12-06 11:47:05

Using Privileged Mode

Time of First Successful Submission: 2025-12-06 11:52:28

Persistent Home Directories - One

Time of First Successful Submission: 2025-12-06 12:26:52

Persistent Home Directories - Two

Time of First Successful Submission: 2025-12-06 12:28:09

Pwntools Tutorials

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Level 0.0

Time of First Successful Submission: 2026-02-01 17:47:56

Level 1.0

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Level 1.1

Time of First Successful Submission: 2026-02-01 18:41:10

Level 2.0

Time of First Successful Submission: 2026-02-01 21:05:20

Level 2.1

Time of First Successful Submission: 2026-02-01 21:14:41

Level 2.2

Time of First Successful Submission: 2026-02-01 21:41:01

Level 2.3

Time of First Successful Submission: 2026-02-01 21:48:02

Level 2.4

Time of First Successful Submission: 2026-02-01 22:16:28

Level 2.5

Time of First Successful Submission: 2026-02-01 22:29:57

Level 2.6

Time of First Successful Submission: 2026-02-01 22:44:27

Level 3.0

Time of First Successful Submission: 2026-02-02 18:12:39

Level 4.0

Time of First Successful Submission: 2026-02-03 19:40:57