RubenvS_

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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-04-02 12:44:06

Command Arguments

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Command History

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The Root Path

Time of First Successful Submission: 2026-04-03 09:08:54

Absolute Paths

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Changing position

Time of First Successful Submission: 2026-04-03 09:19:33

Changing to an Absolute Path

Time of First Successful Submission: 2026-04-03 09:21:42

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

Time of First Successful Submission: 2026-04-08 09:25:23

Piping Stdout

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Piping Stdin

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Start Here

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Using the Terminal

Time of First Successful Submission: 2026-04-02 12:08:55

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-02 12:11:01

Using the GUI Desktop

Time of First Successful Submission: 2026-04-02 12:13:15

Pasting into the Desktop

Time of First Successful Submission: 2026-04-02 12:14:59

Restarting Challenges

Time of First Successful Submission: 2026-04-02 12:18:03

Challenge Programs

Time of First Successful Submission: 2026-04-21 08:32:09

The Flag File

Time of First Successful Submission: 2026-04-21 08:33:56

Using Privileged Mode

Time of First Successful Submission: 2026-04-21 08:37:58

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-21 08:41:14

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-21 08:42:05

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-04-02 12:44:06

Intro to Arguments

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Command History

Time of First Successful Submission: 2026-04-02 12:47:39

The Root

Time of First Successful Submission: 2026-04-03 09:08:54

Program and absolute paths

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Position thy self

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Position elsewhere

Time of First Successful Submission: 2026-04-03 09:21:42

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

Time of First Successful Submission: 2026-04-03 09:40:27

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

Time of First Successful Submission: 2026-04-03 11:02:07

An Epic Filesystem Quest

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making directories

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finding files

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linking files

Time of First Successful Submission: 2026-04-03 11:48:15

Learning From Documentation

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Learning Complex Usage

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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: 2026-04-08 09:25:23

Redirecting more output

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Appending output

Time of First Successful Submission: 2026-04-08 10:15:42

Redirecting errors

Time of First Successful Submission: 2026-04-08 10:19:48

Redirecting input

Time of First Successful Submission: 2026-04-08 10:28:14

Grepping stored results

Time of First Successful Submission: 2026-04-08 10:30:45

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

Time of First Successful Submission: 2026-04-08 11:24:01

Process substitution for input

Time of First Successful Submission: 2026-04-08 11:27:40

Writing to multiple programs

Time of First Successful Submission: 2026-04-08 11:46:42

Split-piping stderr and stdout

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Named pipes

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Printing Variables

Time of First Successful Submission: 2026-04-09 09:05:29

Setting Variables

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Multi-word Variables

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Exporting Variables

Time of First Successful Submission: 2026-04-09 09:15:07

Printing Exported Variables

Time of First Successful Submission: 2026-04-09 09:16:57

Storing Command Output

Time of First Successful Submission: 2026-04-09 09:23:05

Reading Input

Time of First Successful Submission: 2026-04-09 09:26:37

Reading Files

Time of First Successful Submission: 2026-04-09 09:30:30

Translating characters

Time of First Successful Submission: 2026-04-09 09:38:29

Deleting characters

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Deleting newlines

Time of First Successful Submission: 2026-04-09 09:51:11

Extracting the first lines with head

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Extracting specific sections of text

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Sorting data

Time of First Successful Submission: 2026-04-09 10:02:54

Listing Processes

Time of First Successful Submission: 2026-04-14 07:42:06

Killing Processes

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Interrupting Processes

Time of First Successful Submission: 2026-04-14 07:53:59

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: 2026-04-14 09:33:57

Using sudo

Time of First Successful Submission: 2026-04-14 09:44:50

Changing File Ownership

Time of First Successful Submission: 2026-04-16 08:41:38

Groups and Files

Time of First Successful Submission: 2026-04-16 08:45:38

Fun With Groups Names

Time of First Successful Submission: 2026-04-16 08:47:02

Changing Permissions

Time of First Successful Submission: 2026-04-16 08:55:24

Executable Files

Time of First Successful Submission: 2026-04-16 08:58:08

Permission Tweaking Practice

Time of First Successful Submission: 2026-04-16 09:06:40

Permissions Setting Practice

Time of First Successful Submission: 2026-04-16 09:18:05

The SUID Bit

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Chaining with Semicolons

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Building on Success

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Handling Failure

Time of First Successful Submission: 2026-04-17 07:58:17

Your First Shell Script

Time of First Successful Submission: 2026-04-17 08:09:06

Redirecting Script Output

Time of First Successful Submission: 2026-04-17 08:39:22

Executable Shell Scripts

Time of First Successful Submission: 2026-04-17 08:44:55

Understanding Shebangs

Time of First Successful Submission: 2026-04-17 08:54:31

Scripting with Arguments

Time of First Successful Submission: 2026-04-17 08:59:58

Scripting with Conditionals

Time of First Successful Submission: 2026-04-17 09:05:37

Scripting with Default Cases

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Scripting with Multiple Conditions

Time of First Successful Submission: 2026-04-17 10:08:59

Reading Shell Scripts

Time of First Successful Submission: 2026-04-17 10:12:43

Launching Screen

Time of First Successful Submission: 2026-04-18 09:28:16

Detaching and Attaching

Time of First Successful Submission: 2026-04-18 09:31:27

Finding Sessions

Time of First Successful Submission: 2026-04-18 09:34:49

Switching Windows

Time of First Successful Submission: 2026-04-18 09:36:43

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-04-18 09:39:00

Switching Windows (tmux)

Time of First Successful Submission: 2026-04-18 09:40:20

The PATH Variable

Time of First Successful Submission: 2026-04-18 10:21:50

Setting PATH

Time of First Successful Submission: 2026-04-18 10:25:21

Finding Commands

Time of First Successful Submission: 2026-04-18 10:27:46

Adding Commands

Time of First Successful Submission: 2026-04-18 10:43:06

Hijacking Commands

Time of First Successful Submission: 2026-04-18 11:04:52

Bashrc Backdoor

Time of First Successful Submission: 2026-04-18 11:16:23

Sniffing Input

Time of First Successful Submission: 2026-04-18 11:27:32

Overshared Directories

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Tricky Linking

Time of First Successful Submission: 2026-04-18 12:00:54

Sniffing Process Arguments

Time of First Successful Submission: 2026-04-18 12:07:26

Snooping on Configurations

Time of First Successful Submission: 2026-04-18 12:10:31

The Fork Bomb

Time of First Successful Submission: 2026-04-19 09:35:54

Disk-Space Doomsday

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rm -rf /

Time of First Successful Submission: 2026-04-19 09:52:17

Life after rm -rf /

Time of First Successful Submission: 2026-04-19 10:00:53

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-04-19 10:06:04

Computing 101

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Your First Register

Time of First Successful Submission: 2026-04-21 11:32:12

Your First Syscall

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Exit Codes

Time of First Successful Submission: 2026-04-21 11:42:35

Building Executables

Time of First Successful Submission: 2026-04-22 08:35:12

Moving Between Registers

Time of First Successful Submission: 2026-04-22 08:38:32

Loading From Memory

Time of First Successful Submission: 2026-04-22 11:35:32

More Loading Practice

Time of First Successful Submission: 2026-04-22 11:37:37

Dereferencing Pointers

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Dereferencing Yourself

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Dereferencing with Offsets

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Stored Addresses

Time of First Successful Submission: 2026-04-22 12:01:41

Double Dereference

Time of First Successful Submission: 2026-04-22 12:05:53

The Stack

Time of First Successful Submission: 2026-04-23 10:07:20

Stack Offsets

Time of First Successful Submission: 2026-04-23 10:12:02

Program Arguments on the Stack

Time of First Successful Submission: 2026-04-23 10:16:53

Popping From the Stack

Time of First Successful Submission: 2026-04-23 10:20:28

Disassembling Programs

Time of First Successful Submission: 2026-04-24 09:38:26

Tracing Syscalls

Time of First Successful Submission: 2026-04-24 09:42:37

Starting GDB

Time of First Successful Submission: 2026-04-24 09:45:35

Quitting GDB

Time of First Successful Submission: 2026-04-24 09:46:54

Starting Programs in GDB

Time of First Successful Submission: 2026-04-24 09:51:00

Disassembling in GDB

Time of First Successful Submission: 2026-04-24 09:53:16

Stepping Through Instructions

Time of First Successful Submission: 2026-04-24 09:55:17

Reading Register Values

Time of First Successful Submission: 2026-04-24 09:57:56

Popping Stack Values

Time of First Successful Submission: 2026-04-24 10:00:13

Examining Memory

Time of First Successful Submission: 2026-04-24 10:03:19

Examining Stack Pointers

Time of First Successful Submission: 2026-04-24 10:06:34

Cooperative Debugging

Time of First Successful Submission: 2026-04-24 10:31:46

Writing Output

Time of First Successful Submission: 2026-04-25 09:14:22

Chaining Syscalls

Time of First Successful Submission: 2026-04-25 09:16:51

Writing Strings

Time of First Successful Submission: 2026-04-25 09:18:38

Reading Data

Time of First Successful Submission: 2026-04-25 09:37:07

Opening Files

Time of First Successful Submission: 2026-04-25 09:53:53

Hardcoding the Filename

Time of First Successful Submission: 2026-04-25 10:05:49

Comparing Values

Time of First Successful Submission: 2026-04-27 08:54:48

Comparing Characters

Time of First Successful Submission: 2026-04-27 08:59:31

Conditional Control Flow

Time of First Successful Submission: 2026-04-27 09:07:57

Comparing Strings

Time of First Successful Submission: 2026-04-27 09:11:26

Reverse the Password

Time of First Successful Submission: 2026-04-27 09:18:14

Conditionals Without Conditionals

Time of First Successful Submission: 2026-04-27 09:44:08

Looping

Time of First Successful Submission: 2026-04-27 10:03:59

Reverse the Calculation

Time of First Successful Submission: 2026-04-28 08:25:38

Reverse the Reverse

Time of First Successful Submission: 2026-04-28 08:34:52

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-04-28 08:51:03

Loops on Data

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set-register

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set-multiple-registers

Time of First Successful Submission: 2026-04-28 10:40:18

add-to-register

Time of First Successful Submission: 2026-04-28 10:42:40

linear-equation-registers

Time of First Successful Submission: 2026-04-28 10:54:42

integer-division

Time of First Successful Submission: 2026-04-28 11:09:52

modulo-operation

Time of First Successful Submission: 2026-04-30 09:42:46

set-upper-byte

Time of First Successful Submission: 2026-04-30 09:46:46

efficient-modulo

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byte-extraction

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bitwise-and

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check-even

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memory-read

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memory-write

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memory-increment

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byte-access

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memory-size-access

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little-endian-write

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memory-sum

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stack-subtraction

Time of First Successful Submission: 2026-04-30 11:27:31

swap-stack-values

Time of First Successful Submission: 2026-04-30 11:28:57

average-stack-values

Time of First Successful Submission: 2026-04-30 11:35:41

absolute-jump

Time of First Successful Submission: 2026-04-30 11:44:35

relative-jump

Time of First Successful Submission: 2026-05-01 09:49:04

jump-trampoline

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conditional-jump

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indirect-jump

Time of First Successful Submission: 2026-05-01 10:37:56

average-loop

Time of First Successful Submission: 2026-05-01 10:55:12

count-non-zero

Time of First Successful Submission: 2026-05-01 11:08:24

string-lower

Time of First Successful Submission: 2026-05-02 08:56:28

most-common-byte

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Exit

Time of First Successful Submission: 2026-05-06 10:33:32

Socket

Time of First Successful Submission: 2026-05-07 07:34:24

Bind

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Listen

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Accept

Time of First Successful Submission: 2026-05-07 08:25:20

Static Response

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Dynamic Response

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Iterative GET Server

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Concurrent GET Server

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Concurrent POST Server

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Web Server

Time of First Successful Submission: 2026-05-08 11:42:40

Debugging Programs

Time of First Successful Submission: 2026-05-02 09:57:44

Inspecting Registers

Time of First Successful Submission: 2026-05-03 07:59:35

Examining Memory

Time of First Successful Submission: 2026-05-03 08:09:25

Setting Breakpoints

Time of First Successful Submission: 2026-05-03 09:06:14

GDB Scripting

Time of First Successful Submission: 2026-05-04 09:47:24

Modifying Data

Time of First Successful Submission: 2026-05-05 07:54:23

Modifying Execution

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

Broken Functions

Time of First Successful Submission: 2026-05-05 08:21:50

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-04-02 12:08:55

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-02 12:11:01

Using the GUI Desktop

Time of First Successful Submission: 2026-04-02 12:13:15

Pasting into the Desktop

Time of First Successful Submission: 2026-04-02 12:14:59

Restarting Challenges

Time of First Successful Submission: 2026-04-02 12:18:03

Challenge Programs

Time of First Successful Submission: 2026-04-21 08:32:09

The Flag File

Time of First Successful Submission: 2026-04-21 08:33:56

Using Privileged Mode

Time of First Successful Submission: 2026-04-21 08:37:58

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-21 08:41:14

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-21 08:42:05