CalouDev

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-06-16 20:03:56

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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File Formats: Magic Numbers (Python)

Time of First Successful Submission: 2026-06-25 15:03:04

File Formats: Magic Numbers (C)

Time of First Successful Submission: 2026-06-25 15:27:23

File Formats: Magic Numbers (x86)

Time of First Successful Submission: 2026-06-25 15:56:21

Reading Endianness (Python)

Time of First Successful Submission: 2026-07-03 22:12:29

Your First Overflow (easy)

Time of First Successful Submission: 2026-07-02 20:52:31


Start Here

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Using the Terminal

Time of First Successful Submission: 2025-12-25 10:25:49

Using the VSCode Workspace

Time of First Successful Submission: 2025-12-25 10:27:19


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-06-16 20:03:56

Intro to Arguments

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Command History

Time of First Successful Submission: 2026-06-16 20:06:02

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

Time of First Successful Submission: 2026-06-18 20:56:47

more catting practice

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grepping for a needle in a haystack

Time of First Successful Submission: 2026-06-18 20:58:17

comparing files

Time of First Successful Submission: 2026-07-03 21:59:03

listing files

Time of First Successful Submission: 2026-07-05 10:22:08

touching files

Time of First Successful Submission: 2026-07-05 10:25:33

removing files

Time of First Successful Submission: 2026-07-05 10:26:32

moving files

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copying files

Time of First Successful Submission: 2026-07-05 10:30:02

hidden files

Time of First Successful Submission: 2026-07-05 10:33:29

An Epic Filesystem Quest

Time of First Successful Submission: 2026-07-05 10:37:03

making directories

Time of First Successful Submission: 2026-07-05 10:38:06

finding files

Time of First Successful Submission: 2026-07-05 10:57:00

linking files

Time of First Successful Submission: 2026-07-05 11:03:18

Learning From Documentation

Time of First Successful Submission: 2026-07-05 11:57:58

Learning Complex Usage

Time of First Successful Submission: 2026-07-05 12:16:36

Reading Manuals

Time of First Successful Submission: 2026-07-05 12:19:09

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: 2026-07-07 10:47:44

Redirecting more output

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Appending output

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Redirecting errors

Time of First Successful Submission: 2026-07-07 10:52:39

Redirecting input

Time of First Successful Submission: 2026-07-07 10:53:58

Grepping stored results

Time of First Successful Submission: 2026-07-07 10:55:33

Grepping live output

Time of First Successful Submission: 2026-07-07 11:01:21

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: 2026-07-07 12:14:18

Writing to multiple programs

Time of First Successful Submission: 2026-07-07 13:43:32

Split-piping stderr and stdout

Time of First Successful Submission: 2026-07-07 14:43:16

Named pipes

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Printing Variables

Time of First Successful Submission: 2026-07-08 19:20:35

Setting Variables

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Multi-word Variables

Time of First Successful Submission: 2026-07-09 13:33:21

Exporting Variables

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Printing Exported Variables

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Storing Command Output

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Reading Input

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Reading Files

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Translating characters

Time of First Successful Submission: 2026-07-10 21:00:16

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

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Using sudo

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Changing File Ownership

Time of First Successful Submission: 2026-07-28 22:10:48

Groups and Files

Time of First Successful Submission: 2026-07-28 22:15:51

Fun With Groups Names

Time of First Successful Submission: 2026-07-28 22:18:15

Changing Permissions

Time of First Successful Submission: 2026-07-28 22:30:44

Executable Files

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Permission Tweaking Practice

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Permissions Setting Practice

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The SUID Bit

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Chaining with Semicolons

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Building on Success

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Handling Failure

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Your First Shell Script

Time of First Successful Submission: 2026-07-29 23:42:17

Redirecting Script Output

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Executable Shell Scripts

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Understanding Shebangs

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Scripting with Arguments

Time of First Successful Submission: 2026-07-30 00:03:00

Scripting with Conditionals

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Scripting with Default Cases

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Scripting with Multiple Conditions

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Reading Shell Scripts

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Launching Screen

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Detaching and Attaching

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Finding Sessions

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Switching Windows

Time of First Successful Submission: 2026-07-30 21:01:19

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-07-30 21:09:04

Switching Windows (tmux)

Time of First Successful Submission: 2026-07-30 21:16:56

The PATH Variable

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Setting PATH

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Finding Commands

Time of First Successful Submission: 2026-07-30 23:34:27

Adding Commands

Time of First Successful Submission: 2026-07-30 23:51:11

Hijacking Commands

Time of First Successful Submission: 2026-07-31 00:09:22

Bashrc Backdoor

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Sniffing Input

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Overshared Directories

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Tricky Linking

Time of First Successful Submission: 2026-08-01 01:52:02


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: 2025-12-25 17:12:29

Moving Between Registers

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Loading From Memory

Time of First Successful Submission: 2025-12-27 23:00:33

More Loading Practice

Time of First Successful Submission: 2026-06-19 11:39:39

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

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Stack Offsets

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Program Arguments on the Stack

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Popping From the Stack

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Negative Numbers

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Negative Numbers (16-bit)

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Negative Numbers (32-bit)

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Encoding Negatives

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Binary and Hex Encoding

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More Hex

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Decoding Hex

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Mixed Conversions

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Disassembling Programs

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Tracing Syscalls

Time of First Successful Submission: 2025-12-26 14:41:07

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

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Reading Register Values

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Popping Stack Values

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Examining Memory

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Examining Stack Pointers

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Cooperative Debugging

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Running with Arguments

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Writing Output

Time of First Successful Submission: 2026-06-22 15:28:50

Chaining Syscalls

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Writing Strings

Time of First Successful Submission: 2026-06-22 15:34:44

Reading Data

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Reading Exactly

Time of First Successful Submission: 2026-06-22 16:13:38

Opening Files

Time of First Successful Submission: 2026-06-23 11:37:17

Hardcoding the Filename

Time of First Successful Submission: 2026-06-23 13:01:26

RIP-Relative Strings

Time of First Successful Submission: 2026-06-23 13:19:02

Comparing Values

Time of First Successful Submission: 2026-06-24 10:04:53

Comparing Characters

Time of First Successful Submission: 2026-06-24 10:17:58

Conditional Control Flow

Time of First Successful Submission: 2026-06-24 10:53:52

Comparing Strings

Time of First Successful Submission: 2026-06-24 11:20:18

Reverse the Password

Time of First Successful Submission: 2026-06-24 12:41:27

Conditionals Without Conditionals

Time of First Successful Submission: 2026-06-25 13:10:48

Recognizing Loops

Time of First Successful Submission: 2026-06-25 13:30:56


Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-07-12 21:12:51


DSU Cyber Camps

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Using the Terminal

Time of First Successful Submission: 2025-12-25 10:25:49

Using the VSCode Workspace

Time of First Successful Submission: 2025-12-25 10:27:19


GCA CTF

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Using the Terminal

Time of First Successful Submission: 2025-12-25 10:25:49

Using the VSCode Workspace

Time of First Successful Submission: 2025-12-25 10:27:19