Kaushik__

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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-08-18 08:32:42

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

Time of First Successful Submission: 2026-08-22 04:05:11

Piping Stdout

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Piping Stdin

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Start Here

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Using the Terminal

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Using the VSCode Workspace

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Using the GUI Desktop

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Pasting into the Desktop

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Restarting Challenges

Time of First Successful Submission: 2026-09-01 06:11:31

Challenge Programs

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The Flag File

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Using Privileged Mode

Time of First Successful Submission: 2026-09-01 06:33:50

Persistent Home Directories - One

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Persistent Home Directories - Two

Time of First Successful Submission: 2026-09-01 06:43:32

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-08-18 08:32:42

Intro to Arguments

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Command History

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The Root

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Program and absolute paths

Time of First Successful Submission: 2026-08-18 08:50:42

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

Time of First Successful Submission: 2026-08-18 12:41:29

making directories

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finding files

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linking files

Time of First Successful Submission: 2026-08-19 06:57:14

Learning From Documentation

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Learning Complex Usage

Time of First Successful Submission: 2026-08-19 11:11:27

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

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Redirecting errors

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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

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Writing to multiple programs

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Split-piping stderr and stdout

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Named pipes

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Printing Variables

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Setting Variables

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Multi-word Variables

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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: 2026-08-29 09:42:28

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: 2026-08-29 17:05:32

Groups and Files

Time of First Successful Submission: 2026-08-30 05:39:54

Fun With Groups Names

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Changing Permissions

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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

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Redirecting Script Output

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Executable Shell Scripts

Time of First Successful Submission: 2026-08-30 09:03:49

Understanding Shebangs

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Scripting with Arguments

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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

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Detaching and Attaching (tmux)

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Switching Windows (tmux)

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The PATH Variable

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Setting PATH

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Finding Commands

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Adding Commands

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Hijacking Commands

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Bashrc Backdoor

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Sniffing Input

Time of First Successful Submission: 2026-08-31 06:26:03

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

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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

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Moving Between Registers

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Loading From Memory

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More Loading Practice

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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

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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

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Reading Register Values

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Setting Register Values

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Popping Stack Values

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Examining Memory

Time of First Successful Submission: 2026-09-10 10:28:23

Examining Stack Pointers

Time of First Successful Submission: 2026-09-11 04:16:24

Cooperative Debugging

Time of First Successful Submission: 2026-09-11 04:27:19

Running with Arguments

Time of First Successful Submission: 2026-09-11 04:29:29

Redirecting Input in GDB

Time of First Successful Submission: 2026-09-11 04:34:00

Writing Output

Time of First Successful Submission: 2026-09-11 05:00:42

Chaining Syscalls

Time of First Successful Submission: 2026-09-11 05:05:31

Writing Strings

Time of First Successful Submission: 2026-09-11 05:10:59

Reading Data

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Reading Exactly

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Opening Files

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Hardcoding the Filename

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RIP-Relative Strings

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Comparing Values

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Comparing Characters

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Conditional Control Flow

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Comparing Strings

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Reverse the Password

Time of First Successful Submission: 2026-09-14 07:13:38

Conditionals Without Conditionals

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Recognizing Loops

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Writing Loops

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Writing From a Shared Library

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Returning a Value

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Calling Through a Pointer

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Calling Through a Pointer with an Argument

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Saving Caller-Saved Registers

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Saving Callee-Saved Registers

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Sign Extension

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Little-Endian Bytes

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Qword by Qword

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Dword by Dword

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Word by Word

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Byte by Byte

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Cracking a Struct

Time of First Successful Submission: 2026-09-18 05:27:14

Scrambled Struct

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Reverse the Calculation

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Reverse the Reverse

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Dealing with Bitwise Operations

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Even or Odd

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Masking Bits

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Lowercase a String

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Uppercase a String

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Swap Case

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Shifting Left

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Shifting Right

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Loops on Data

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Reaching Into the Caller's Frame

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Loading Stale Stack Data

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Stealing Stale Stack Data

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Reserving Your Own Frame

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Using Your Own Frame

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Environment Variables on the Stack

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Aligning the Stack Through the Environment

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Aligning the Stack Through GDB

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Aligning the Stack Through GDB, Generalized

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A Single Digit

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Two Digits

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String to Integer

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Negative Numbers

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Where the Number Ends

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A Whole Program

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A Single Digit, Back to Text

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Divide and Remainder

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Drop the Leading Zero

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Integer to String

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Negative Numbers, Back to Text

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Sum Them All

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Addition

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Subtraction

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Multiplication

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Bitwise Operators

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Unary Operators

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Literal Output

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Newline Escapes

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Escaped Syntax

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Decimal Markers

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Multiple Decimal Markers

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String Markers

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Hex Byte Escapes

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Debugging Programs

Time of First Successful Submission: 2026-09-21 05:09:40

Inspecting Registers

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Examining Memory

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Setting Breakpoints

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GDB Scripting

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Modifying Data

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Modifying Execution

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Broken Functions

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Exit

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Socket

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Bind

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Listen

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Accept

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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

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Playing With Programs

116 / 116 1316 / 26752

What's the password?

Time of First Successful Submission: 2026-09-24 08:45:57

... and again!

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Newline Troubles

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Reasoning about files

Time of First Successful Submission: 2026-09-26 08:43:58

Specifying Filenames

Time of First Successful Submission: 2026-09-26 08:47:03

Binary and Hex Encoding

Time of First Successful Submission: 2026-09-26 08:50:48

More Hex

Time of First Successful Submission: 2026-09-26 08:53:28

Decoding Hex

Time of First Successful Submission: 2026-09-26 08:55:55

Decoding Practice

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Encoding Practice

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Hex-encoding ASCII

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Nested Encoding

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Hex-encoding UTF-8

Time of First Successful Submission: 2026-09-26 09:17:02

UTF Mixups

Time of First Successful Submission: 2026-09-26 09:18:16

Modifying Encoded Data

Time of First Successful Submission: 2026-09-26 09:20:10

Decoding Base64

Time of First Successful Submission: 2026-09-26 09:21:26

Encoding Base64

Time of First Successful Submission: 2026-09-26 09:22:56

Dealing with Obfuscation

Time of First Successful Submission: 2026-09-26 09:25:18

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-09-26 09:27:39

Your First HTTP Request

Time of First Successful Submission: 2026-09-29 12:39:06

Reading Flask

Time of First Successful Submission: 2026-09-29 12:57:38

Commented Data

Time of First Successful Submission: 2026-09-29 13:02:09

HTTP Metadata

Time of First Successful Submission: 2026-09-29 13:12:58

HTTP (netcat)

Time of First Successful Submission: 2026-09-30 06:15:46

HTTP Paths (netcat)

Time of First Successful Submission: 2026-09-30 06:19:46

HTTP (curl)

Time of First Successful Submission: 2026-09-30 06:27:17

HTTP (python)

Time of First Successful Submission: 2026-09-30 06:34:13

HTTP Host Header (python)

Time of First Successful Submission: 2026-09-30 07:07:51

HTTP Host Header (curl)

Time of First Successful Submission: 2026-09-30 07:12:29

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-09-30 07:15:25

URL Encoding (netcat)

Time of First Successful Submission: 2026-09-30 07:19:18

HTTP GET Parameters

Time of First Successful Submission: 2026-09-30 07:20:54

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-09-30 07:22:23

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-09-30 07:24:24

HTTP Forms

Time of First Successful Submission: 2026-09-30 07:27:50

HTTP Forms (curl)

Time of First Successful Submission: 2026-09-30 08:31:07

HTTP Forms (netcat)

Time of First Successful Submission: 2026-09-30 08:37:48

HTTP Forms (python)

Time of First Successful Submission: 2026-09-30 08:39:37

HTTP Forms Without Forms

Time of First Successful Submission: 2026-09-30 08:44:21

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-09-30 08:46:26

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-09-30 08:49:20

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-09-30 08:51:42

HTTP Redirects (curl)

Time of First Successful Submission: 2026-09-30 08:53:30

HTTP Redirects (python)

Time of First Successful Submission: 2026-09-30 08:56:02

HTTP Cookies (curl)

Time of First Successful Submission: 2026-09-30 08:58:27

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-10-01 08:32:26

HTTP Cookies (python)

Time of First Successful Submission: 2026-10-01 08:33:32

Server State (python)

Time of First Successful Submission: 2026-10-01 08:35:39

Listening Web

Time of First Successful Submission: 2026-10-01 08:37:33

Speaking Redirects

Time of First Successful Submission: 2026-10-01 08:49:46

JavaScript Redirects

Time of First Successful Submission: 2026-10-01 08:53:35

Including JavaScript

Time of First Successful Submission: 2026-10-01 08:57:55

HTTP (javascript)

Time of First Successful Submission: 2026-10-01 09:00:26

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-10-01 09:03:13

HTTP Forms (javascript)

Time of First Successful Submission: 2026-10-01 09:05:15

cat

Time of First Successful Submission: 2026-10-02 05:31:12

more

Time of First Successful Submission: 2026-10-02 05:38:37

less

Time of First Successful Submission: 2026-10-02 05:39:02

tail

Time of First Successful Submission: 2026-10-02 05:39:49

head

Time of First Successful Submission: 2026-10-02 05:40:12

sort

Time of First Successful Submission: 2026-10-02 05:40:38

vim

Time of First Successful Submission: 2026-10-02 05:41:55

emacs

Time of First Successful Submission: 2026-10-02 05:42:21

nano

Time of First Successful Submission: 2026-10-02 05:42:42

rev

Time of First Successful Submission: 2026-10-02 05:44:15

od

Time of First Successful Submission: 2026-10-02 05:46:43

hd

Time of First Successful Submission: 2026-10-02 05:48:16

xxd

Time of First Successful Submission: 2026-10-02 05:49:29

base32

Time of First Successful Submission: 2026-10-02 05:50:36

base64

Time of First Successful Submission: 2026-10-02 05:51:14

split

Time of First Successful Submission: 2026-10-02 05:53:36

gzip

Time of First Successful Submission: 2026-10-02 06:05:25

bzip2

Time of First Successful Submission: 2026-10-02 06:08:45

zip

Time of First Successful Submission: 2026-10-02 06:12:16

tar

Time of First Successful Submission: 2026-10-02 06:14:50

ar

Time of First Successful Submission: 2026-10-02 06:17:14

cpio

Time of First Successful Submission: 2026-10-02 06:18:50

genisoimage

Time of First Successful Submission: 2026-10-02 12:51:49

env

Time of First Successful Submission: 2026-10-02 06:26:47

find

Time of First Successful Submission: 2026-10-02 06:27:30

make

Time of First Successful Submission: 2026-10-02 06:28:19

nice

Time of First Successful Submission: 2026-10-02 06:28:58

timeout

Time of First Successful Submission: 2026-10-02 11:52:24

stdbuf

Time of First Successful Submission: 2026-10-02 11:53:28

setarch

Time of First Successful Submission: 2026-10-02 11:54:33

watch

Time of First Successful Submission: 2026-10-02 11:56:01

socat

Time of First Successful Submission: 2026-10-02 11:57:24

whiptail

Time of First Successful Submission: 2026-10-02 11:58:50

awk

Time of First Successful Submission: 2026-10-02 12:00:29

sed

Time of First Successful Submission: 2026-10-02 12:01:19

ed

Time of First Successful Submission: 2026-10-02 12:02:17

chown

Time of First Successful Submission: 2026-10-02 12:03:34

chmod

Time of First Successful Submission: 2026-10-02 12:04:36

cp

Time of First Successful Submission: 2026-10-02 12:52:49

mv

Time of First Successful Submission: 2026-10-09 16:27:56

perl

Time of First Successful Submission: 2026-10-02 12:22:46

python

Time of First Successful Submission: 2026-10-02 12:23:06

ruby

Time of First Successful Submission: 2026-10-02 12:24:29

bash

Time of First Successful Submission: 2026-10-02 12:27:35

date

Time of First Successful Submission: 2026-10-02 12:28:47

dmesg

Time of First Successful Submission: 2026-10-02 12:31:47

wc

Time of First Successful Submission: 2026-10-02 12:33:46

gcc

Time of First Successful Submission: 2026-10-02 12:36:16

as

Time of First Successful Submission: 2026-10-02 12:39:17

wget

Time of First Successful Submission: 2026-10-02 12:47:10

ssh-keygen

Time of First Successful Submission: 2026-10-02 12:50:25

SQL Queries

Time of First Successful Submission: 2026-10-03 15:35:22

Filtering SQL

Time of First Successful Submission: 2026-10-03 15:36:45

Choosing Columns

Time of First Successful Submission: 2026-10-03 15:37:44

Exclusionary Filtering

Time of First Successful Submission: 2026-10-03 15:38:49

Filtering Strings

Time of First Successful Submission: 2026-10-03 15:39:59

Filtering on Expressions

Time of First Successful Submission: 2026-10-03 15:41:06

SELECTing Expressions

Time of First Successful Submission: 2026-10-03 16:00:26

Composite Conditions

Time of First Successful Submission: 2026-10-03 16:02:57

Reaching Your LIMITs

Time of First Successful Submission: 2026-10-03 16:04:19

Querying Metadata

Time of First Successful Submission: 2026-10-03 16:05:51

DSU Cyber Camps

10 / 104 28140 / 70250

Using the Terminal

Time of First Successful Submission: 2026-09-01 05:56:39

Using the VSCode Workspace

Time of First Successful Submission: 2026-09-01 05:59:33

Using the GUI Desktop

Time of First Successful Submission: 2026-09-01 06:04:29

Pasting into the Desktop

Time of First Successful Submission: 2026-09-01 06:08:27

Restarting Challenges

Time of First Successful Submission: 2026-09-01 06:11:31

Challenge Programs

Time of First Successful Submission: 2026-09-01 06:12:29

The Flag File

Time of First Successful Submission: 2026-09-01 06:15:31

Using Privileged Mode

Time of First Successful Submission: 2026-09-01 06:33:50

Persistent Home Directories - One

Time of First Successful Submission: 2026-09-01 06:42:48

Persistent Home Directories - Two

Time of First Successful Submission: 2026-09-01 06:43:32

GCA CTF

10 / 104 28140 / 70250

Using the Terminal

Time of First Successful Submission: 2026-09-01 05:56:39

Using the VSCode Workspace

Time of First Successful Submission: 2026-09-01 05:59:33

Using the GUI Desktop

Time of First Successful Submission: 2026-09-01 06:04:29

Pasting into the Desktop

Time of First Successful Submission: 2026-09-01 06:08:27

Restarting Challenges

Time of First Successful Submission: 2026-09-01 06:11:31

Challenge Programs

Time of First Successful Submission: 2026-09-01 06:12:29

The Flag File

Time of First Successful Submission: 2026-09-01 06:15:31

Using Privileged Mode

Time of First Successful Submission: 2026-09-01 06:33:50

Persistent Home Directories - One

Time of First Successful Submission: 2026-09-01 06:42:48

Persistent Home Directories - Two

Time of First Successful Submission: 2026-09-01 06:43:32