NaizDis

🐧

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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Start Here

12 / 12 2012 / 44986

Using the Terminal

Time of First Successful Submission: 2026-04-04 23:36:27

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-04 23:39:46

Using the GUI Desktop

Time of First Successful Submission: 2026-04-04 23:42:06

Pasting into the Desktop

Time of First Successful Submission: 2026-04-04 23:44:54

Restarting Challenges

Time of First Successful Submission: 2026-04-04 23:51:55

Challenge Programs

Time of First Successful Submission: 2026-04-04 23:59:58

The Flag File

Time of First Successful Submission: 2026-04-05 00:02:46

Using Privileged Mode

Time of First Successful Submission: 2026-04-05 00:11:38

Persistent Home Directories - One

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Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-05 00:15:25

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-04-05 20:20:26

Intro to Arguments

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Command History

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The Root

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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

Time of First Successful Submission: 2026-04-05 21:10:18

Learning From Documentation

Time of First Successful Submission: 2026-04-06 19:48:12

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

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Redirecting more output

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Appending output

Time of First Successful Submission: 2026-04-07 05:38:46

Redirecting errors

Time of First Successful Submission: 2026-04-07 05:44:14

Redirecting input

Time of First Successful Submission: 2026-04-07 05:48:23

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: 2026-04-07 19:32:31

Writing to multiple programs

Time of First Successful Submission: 2026-04-07 19:41:42

Split-piping stderr and stdout

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Named pipes

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Printing Variables

Time of First Successful Submission: 2026-04-10 09:07:18

Setting Variables

Time of First Successful Submission: 2026-04-10 09:10:23

Multi-word Variables

Time of First Successful Submission: 2026-04-10 09:11:58

Exporting Variables

Time of First Successful Submission: 2026-04-10 09:18:44

Printing Exported Variables

Time of First Successful Submission: 2026-04-10 09:19:42

Storing Command Output

Time of First Successful Submission: 2026-04-10 09:26:55

Reading Input

Time of First Successful Submission: 2026-04-11 12:46:21

Reading Files

Time of First Successful Submission: 2026-04-11 12:47:50

Translating characters

Time of First Successful Submission: 2026-04-12 12:43:54

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

Time of First Successful Submission: 2026-04-12 12:53:44

Sorting data

Time of First Successful Submission: 2026-04-12 12:55:52

Listing Processes

Time of First Successful Submission: 2026-04-12 13:06:12

Killing Processes

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Interrupting Processes

Time of First Successful Submission: 2026-04-12 13:13:37

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: 2026-04-12 14:00:50

Using sudo

Time of First Successful Submission: 2026-04-12 14:03:31

Changing File Ownership

Time of First Successful Submission: 2026-04-12 15:38:52

Groups and Files

Time of First Successful Submission: 2026-04-12 15:44:33

Fun With Groups Names

Time of First Successful Submission: 2026-04-12 16:10:40

Changing Permissions

Time of First Successful Submission: 2026-04-12 16:14:33

Executable Files

Time of First Successful Submission: 2026-04-12 16:18:43

Permission Tweaking Practice

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Permissions Setting Practice

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The SUID Bit

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Chaining with Semicolons

Time of First Successful Submission: 2026-04-13 13:37:44

Building on Success

Time of First Successful Submission: 2026-04-13 13:42:37

Handling Failure

Time of First Successful Submission: 2026-04-13 13:43:36

Your First Shell Script

Time of First Successful Submission: 2026-04-13 13:47:37

Redirecting Script Output

Time of First Successful Submission: 2026-04-13 14:07:33

Executable Shell Scripts

Time of First Successful Submission: 2026-04-13 14:08:44

Understanding Shebangs

Time of First Successful Submission: 2026-04-13 14:14:42

Scripting with Arguments

Time of First Successful Submission: 2026-04-13 14:17:06

Scripting with Conditionals

Time of First Successful Submission: 2026-04-13 14:29:47

Scripting with Default Cases

Time of First Successful Submission: 2026-04-13 14:31:34

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-04-13 14:34:18

Reading Shell Scripts

Time of First Successful Submission: 2026-04-13 14:36:33

Launching Screen

Time of First Successful Submission: 2026-04-13 17:36:35

Detaching and Attaching

Time of First Successful Submission: 2026-04-13 17:38:19

Finding Sessions

Time of First Successful Submission: 2026-04-13 17:40:24

Switching Windows

Time of First Successful Submission: 2026-04-13 17:41:38

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-04-13 17:42:29

Switching Windows (tmux)

Time of First Successful Submission: 2026-04-13 17:43:02

The PATH Variable

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Setting PATH

Time of First Successful Submission: 2026-04-13 17:49:57

Finding Commands

Time of First Successful Submission: 2026-04-13 17:51:49

Adding Commands

Time of First Successful Submission: 2026-04-13 18:00:51

Hijacking Commands

Time of First Successful Submission: 2026-04-13 18:17:24

Bashrc Backdoor

Time of First Successful Submission: 2026-04-13 21:17:46

Sniffing Input

Time of First Successful Submission: 2026-04-13 21:35:00

Overshared Directories

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Tricky Linking

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Sniffing Process Arguments

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Snooping on Configurations

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The Fork Bomb

Time of First Successful Submission: 2026-04-13 22:22:09

Disk-Space Doomsday

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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: 2026-04-14 17:56:13

Moving Between Registers

Time of First Successful Submission: 2026-04-14 18:04:38

Loading From Memory

Time of First Successful Submission: 2026-04-17 22:19:37

More Loading Practice

Time of First Successful Submission: 2026-04-17 22:20:43

Dereferencing Pointers

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Dereferencing Yourself

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Dereferencing with Offsets

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Stored Addresses

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Double Dereference

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The Stack

Time of First Successful Submission: 2026-04-18 14:27:24

Stack Offsets

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Program Arguments on the Stack

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Popping From the Stack

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Disassembling Programs

Time of First Successful Submission: 2026-04-18 16:48:21

Tracing Syscalls

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Starting GDB

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Quitting GDB

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Starting Programs in GDB

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Disassembling in GDB

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Stepping Through Instructions

Time of First Successful Submission: 2026-04-18 17:05:42

Reading Register Values

Time of First Successful Submission: 2026-04-18 17:13:17

Popping Stack Values

Time of First Successful Submission: 2026-04-18 17:15:01

Examining Memory

Time of First Successful Submission: 2026-04-18 17:17:32

Examining Stack Pointers

Time of First Successful Submission: 2026-04-18 17:22:11

Cooperative Debugging

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Writing Output

Time of First Successful Submission: 2026-04-19 13:16:31

Chaining Syscalls

Time of First Successful Submission: 2026-04-19 13:18:56

Writing Strings

Time of First Successful Submission: 2026-04-19 13:26:46

Reading Data

Time of First Successful Submission: 2026-04-19 13:40:58

Opening Files

Time of First Successful Submission: 2026-04-19 13:57:50

Hardcoding the Filename

Time of First Successful Submission: 2026-04-19 14:14:02

Comparing Values

Time of First Successful Submission: 2026-04-20 21:03:41

Comparing Characters

Time of First Successful Submission: 2026-04-20 21:06:12

Conditional Control Flow

Time of First Successful Submission: 2026-04-20 21:12:50

Comparing Strings

Time of First Successful Submission: 2026-04-20 21:16:16

Reverse the Password

Time of First Successful Submission: 2026-04-20 21:22:40

Conditionals Without Conditionals

Time of First Successful Submission: 2026-04-20 21:56:39

Looping

Time of First Successful Submission: 2026-04-20 22:01:47

Reverse the Calculation

Time of First Successful Submission: 2026-04-21 08:03:24

Reverse the Reverse

Time of First Successful Submission: 2026-04-21 08:08:51

Dealing with Bitwise Operations

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Loops on Data

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set-register

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set-multiple-registers

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add-to-register

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linear-equation-registers

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integer-division

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modulo-operation

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set-upper-byte

Time of First Successful Submission: 2026-04-23 04:55:39

efficient-modulo

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byte-extraction

Time of First Successful Submission: 2026-04-23 14:17:33

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

Time of First Successful Submission: 2026-04-23 14:35:43

memory-size-access

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little-endian-write

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memory-sum

Time of First Successful Submission: 2026-04-23 14:52:57

stack-subtraction

Time of First Successful Submission: 2026-04-23 14:55:21

swap-stack-values

Time of First Successful Submission: 2026-04-23 14:57:33

average-stack-values

Time of First Successful Submission: 2026-04-23 15:02:03

absolute-jump

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relative-jump

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jump-trampoline

Time of First Successful Submission: 2026-04-23 15:10:55

conditional-jump

Time of First Successful Submission: 2026-04-23 15:28:23

indirect-jump

Time of First Successful Submission: 2026-04-23 15:34:43

average-loop

Time of First Successful Submission: 2026-04-23 15:39:38

count-non-zero

Time of First Successful Submission: 2026-04-23 15:52:47

string-lower

Time of First Successful Submission: 2026-04-23 16:50:55

GCA CTF

12 / 104 2265 / 45269

Using the Terminal

Time of First Successful Submission: 2026-04-04 23:36:27

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-04 23:39:46

Using the GUI Desktop

Time of First Successful Submission: 2026-04-04 23:42:06

Pasting into the Desktop

Time of First Successful Submission: 2026-04-04 23:44:54

Connecting over SSH

Time of First Successful Submission: 2026-04-04 23:47:55

Restarting Challenges

Time of First Successful Submission: 2026-04-04 23:51:55

Getting Help

Time of First Successful Submission: 2026-04-04 23:58:08

Challenge Programs

Time of First Successful Submission: 2026-04-04 23:59:58

The Flag File

Time of First Successful Submission: 2026-04-05 00:02:46

Using Privileged Mode

Time of First Successful Submission: 2026-04-05 00:11:38

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-05 00:14:39

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-05 00:15:25