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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-05-10 19:42:02

Command Arguments

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Command History

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The Root Path

Time of First Successful Submission: 2026-05-10 21:38:20

Absolute Paths

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Changing position

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

Changing to an Absolute Path

Time of First Successful Submission: 2026-05-10 21:43:38

Relative Paths

Time of First Successful Submission: 2026-05-10 21:44:53

Cat

Time of First Successful Submission: 2026-05-10 21:51:35

Ls

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Ls All

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Find

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Piping Echo

Time of First Successful Submission: 2026-05-11 13:18:10

Piping Stdout

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Piping Stdin

Time of First Successful Submission: 2026-05-11 13:23:24


Intro to Cybersecurity

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Path Traversal 1

Time of First Successful Submission: 2026-05-27 12:58:34

Path Traversal 2

Time of First Successful Submission: 2026-05-27 13:58:36

CMDi 1

Time of First Successful Submission: 2026-05-27 14:11:51

CMDi 2

Time of First Successful Submission: 2026-05-27 14:13:12

CMDi 3

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CMDi 4

Time of First Successful Submission: 2026-05-27 14:22:04

CMDi 5

Time of First Successful Submission: 2026-05-27 14:27:49

CMDi 6

Time of First Successful Submission: 2026-05-27 14:57:07

Authentication Bypass 1

Time of First Successful Submission: 2026-05-27 15:26:23

Authentication Bypass 2

Time of First Successful Submission: 2026-05-27 15:46:46

SQLi 1

Time of First Successful Submission: 2026-05-27 16:05:56

SQLi 2

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SQLi 3

Time of First Successful Submission: 2026-05-27 16:34:39

SQLi 4

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SQLi 5

Time of First Successful Submission: 2026-05-27 18:19:06


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-05-10 15:40:15

Using the VSCode Workspace

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Using the GUI Desktop

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Pasting into the Desktop

Time of First Successful Submission: 2026-05-10 15:43:26

Restarting Challenges

Time of First Successful Submission: 2026-05-10 18:47:26

Challenge Programs

Time of First Successful Submission: 2026-05-10 18:55:16

The Flag File

Time of First Successful Submission: 2026-05-10 19:01:48

Using Privileged Mode

Time of First Successful Submission: 2026-05-10 19:09:44

Persistent Home Directories - One

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Persistent Home Directories - Two

Time of First Successful Submission: 2026-05-10 19:17:41


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-05-10 19:42:02

Intro to Arguments

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Command History

Time of First Successful Submission: 2026-05-10 19:44:29

The Root

Time of First Successful Submission: 2026-05-10 21:38:20

Program and absolute paths

Time of First Successful Submission: 2026-05-10 21:40:52

Position thy self

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Position elsewhere

Time of First Successful Submission: 2026-05-10 21:43:38

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: 2026-05-10 21:49:53

cat: not the pet, but the command!

Time of First Successful Submission: 2026-05-10 21:51:35

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

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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

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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

Time of First Successful Submission: 2026-05-11 13:40:44

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

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Deleting characters

Time of First Successful Submission: 2026-05-11 19:00:33

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: 2026-05-11 22:28:51

Using sudo

Time of First Successful Submission: 2026-05-11 22:30:23

Changing File Ownership

Time of First Successful Submission: 2026-05-12 08:05:46

Groups and Files

Time of First Successful Submission: 2026-05-12 08:07:29

Fun With Groups Names

Time of First Successful Submission: 2026-05-12 08:08:25

Changing Permissions

Time of First Successful Submission: 2026-05-12 08:12:40

Executable Files

Time of First Successful Submission: 2026-05-12 08:14:46

Permission Tweaking Practice

Time of First Successful Submission: 2026-05-12 08:20:10

Permissions Setting Practice

Time of First Successful Submission: 2026-05-12 08:28:12

The SUID Bit

Time of First Successful Submission: 2026-05-12 08:30:00

Chaining with Semicolons

Time of First Successful Submission: 2026-05-12 08:31:30

Building on Success

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Handling Failure

Time of First Successful Submission: 2026-05-12 08:44:50

Your First Shell Script

Time of First Successful Submission: 2026-05-12 08:50:04

Redirecting Script Output

Time of First Successful Submission: 2026-05-12 08:55:30

Executable Shell Scripts

Time of First Successful Submission: 2026-05-12 09:06:01

Understanding Shebangs

Time of First Successful Submission: 2026-05-12 09:07:41

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

Time of First Successful Submission: 2026-05-12 09:13:53

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: 2026-05-12 09:21:31

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-05-12 09:22:38

Switching Windows (tmux)

Time of First Successful Submission: 2026-05-12 09:23:00

The PATH Variable

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Setting PATH

Time of First Successful Submission: 2026-05-12 09:27:15

Finding Commands

Time of First Successful Submission: 2026-05-12 09:28:29

Adding Commands

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Hijacking Commands

Time of First Successful Submission: 2026-05-12 09:42:44

Bashrc Backdoor

Time of First Successful Submission: 2026-05-12 09:45:04

Sniffing Input

Time of First Successful Submission: 2026-05-12 09:50:27

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 /

Time of First Successful Submission: 2026-05-12 10:37:40


Computing 101

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Your First Register

Time of First Successful Submission: 2026-05-13 09:07:16

Your First Syscall

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Exit Codes

Time of First Successful Submission: 2026-05-13 10:21:34

Building Executables

Time of First Successful Submission: 2026-05-13 10:31:21

Moving Between Registers

Time of First Successful Submission: 2026-05-13 10:36:31

Loading From Memory

Time of First Successful Submission: 2026-05-13 13:39:13

More Loading Practice

Time of First Successful Submission: 2026-05-13 13:40:24

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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Disassembling Programs

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

Tracing Syscalls

Time of First Successful Submission: 2026-05-14 14:13:09

Starting GDB

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

Quitting GDB

Time of First Successful Submission: 2026-05-14 14:14:34

Starting Programs in GDB

Time of First Successful Submission: 2026-05-14 14:16:02

Disassembling in GDB

Time of First Successful Submission: 2026-05-14 14:16:40

Stepping Through Instructions

Time of First Successful Submission: 2026-05-14 14:17:45

Reading Register Values

Time of First Successful Submission: 2026-05-14 14:18:32

Popping Stack Values

Time of First Successful Submission: 2026-05-14 14:20:05

Examining Memory

Time of First Successful Submission: 2026-05-14 14:27:57

Examining Stack Pointers

Time of First Successful Submission: 2026-05-14 14:31:42

Cooperative Debugging

Time of First Successful Submission: 2026-05-14 14:39:56

Writing Output

Time of First Successful Submission: 2026-05-15 14:22:23

Chaining Syscalls

Time of First Successful Submission: 2026-05-15 14:25:17

Writing Strings

Time of First Successful Submission: 2026-05-15 14:25:57

Reading Data

Time of First Successful Submission: 2026-05-15 15:02:21

Opening Files

Time of First Successful Submission: 2026-05-15 15:20:12

Hardcoding the Filename

Time of First Successful Submission: 2026-05-15 15:55:17

Comparing Values

Time of First Successful Submission: 2026-05-15 17:22:04

Comparing Characters

Time of First Successful Submission: 2026-05-15 17:34:13

Conditional Control Flow

Time of First Successful Submission: 2026-05-15 17:39:46

Comparing Strings

Time of First Successful Submission: 2026-05-15 17:41:18

Reverse the Password

Time of First Successful Submission: 2026-05-15 17:51:18

Conditionals Without Conditionals

Time of First Successful Submission: 2026-05-15 18:06:00

Looping

Time of First Successful Submission: 2026-05-16 10:18:38

Reverse the Calculation

Time of First Successful Submission: 2026-05-16 11:29:02

Reverse the Reverse

Time of First Successful Submission: 2026-05-16 11:44:51

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-05-17 10:51:34

Loops on Data

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set-register

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set-multiple-registers

Time of First Successful Submission: 2026-05-17 12:41:02

add-to-register

Time of First Successful Submission: 2026-05-17 12:43:00

linear-equation-registers

Time of First Successful Submission: 2026-05-17 13:43:09

integer-division

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modulo-operation

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set-upper-byte

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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: 2026-05-17 20:19:26

swap-stack-values

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average-stack-values

Time of First Successful Submission: 2026-05-17 20:23:14

absolute-jump

Time of First Successful Submission: 2026-05-17 20:30:29

relative-jump

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jump-trampoline

Time of First Successful Submission: 2026-05-17 21:14:53

conditional-jump

Time of First Successful Submission: 2026-05-18 09:55:00

indirect-jump

Time of First Successful Submission: 2026-05-18 10:01:21

average-loop

Time of First Successful Submission: 2026-05-18 10:24:49

count-non-zero

Time of First Successful Submission: 2026-05-18 10:30:46

string-lower

Time of First Successful Submission: 2026-05-18 23:21:29

most-common-byte

Time of First Successful Submission: 2026-05-20 12:46:24

Exit

Time of First Successful Submission: 2026-05-20 17:41:59

Socket

Time of First Successful Submission: 2026-05-20 17:57:04

Bind

Time of First Successful Submission: 2026-05-20 18:09:06

Listen

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Accept

Time of First Successful Submission: 2026-05-20 18:18:22

Static Response

Time of First Successful Submission: 2026-05-20 21:07:30

Dynamic Response

Time of First Successful Submission: 2026-05-21 07:57:36

Iterative GET Server

Time of First Successful Submission: 2026-05-21 08:03:27

Concurrent GET Server

Time of First Successful Submission: 2026-05-21 08:09:50

Concurrent POST Server

Time of First Successful Submission: 2026-05-21 09:45:58

Web Server

Time of First Successful Submission: 2026-05-21 09:47:05

Debugging Programs

Time of First Successful Submission: 2026-05-21 12:57:37

Inspecting Registers

Time of First Successful Submission: 2026-05-21 12:58:48

Examining Memory

Time of First Successful Submission: 2026-05-21 13:13:57

Setting Breakpoints

Time of First Successful Submission: 2026-05-21 13:49:19

GDB Scripting

Time of First Successful Submission: 2026-05-21 15:42:19

Modifying Data

Time of First Successful Submission: 2026-05-21 17:46:14

Modifying Execution

Time of First Successful Submission: 2026-05-21 21:39:59

Broken Functions

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Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-05-22 09:38:32

... and again!

Time of First Successful Submission: 2026-05-22 09:39:01

Newline Troubles

Time of First Successful Submission: 2026-05-22 09:40:16

Reasoning about files

Time of First Successful Submission: 2026-05-22 09:41:30

Specifying Filenames

Time of First Successful Submission: 2026-05-22 09:42:34

Binary and Hex Encoding

Time of First Successful Submission: 2026-05-22 09:53:39

More Hex

Time of First Successful Submission: 2026-05-22 10:06:23

Decoding Hex

Time of First Successful Submission: 2026-05-22 10:27:29

Decoding Practice

Time of First Successful Submission: 2026-05-22 10:34:35

Encoding Practice

Time of First Successful Submission: 2026-05-22 10:56:57

Hex-encoding ASCII

Time of First Successful Submission: 2026-05-22 11:53:06

Nested Encoding

Time of First Successful Submission: 2026-05-22 12:04:34

Hex-encoding UTF-8

Time of First Successful Submission: 2026-05-22 12:42:14

UTF Mixups

Time of First Successful Submission: 2026-05-22 13:20:41

Modifying Encoded Data

Time of First Successful Submission: 2026-05-22 13:24:37

Decoding Base64

Time of First Successful Submission: 2026-05-22 13:50:07

Encoding Base64

Time of First Successful Submission: 2026-05-22 14:37:30

Dealing with Obfuscation

Time of First Successful Submission: 2026-05-22 14:44:12

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-05-22 15:16:14

Your First HTTP Request

Time of First Successful Submission: 2026-05-22 20:49:14

Reading Flask

Time of First Successful Submission: 2026-05-22 22:22:23

Commented Data

Time of First Successful Submission: 2026-05-22 22:23:52

HTTP Metadata

Time of First Successful Submission: 2026-05-22 22:30:09

HTTP (netcat)

Time of First Successful Submission: 2026-05-23 08:20:36

HTTP Paths (netcat)

Time of First Successful Submission: 2026-05-23 08:28:35

HTTP (curl)

Time of First Successful Submission: 2026-05-23 08:31:40

HTTP (python)

Time of First Successful Submission: 2026-05-23 08:34:52

HTTP Host Header (python)

Time of First Successful Submission: 2026-05-23 08:44:13

HTTP Host Header (curl)

Time of First Successful Submission: 2026-05-23 08:47:14

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-05-23 22:41:08

URL Encoding (netcat)

Time of First Successful Submission: 2026-05-23 22:45:55

HTTP GET Parameters

Time of First Successful Submission: 2026-05-23 23:03:24

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-05-23 23:05:03

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-05-23 23:07:18

HTTP Forms

Time of First Successful Submission: 2026-05-23 23:11:01

HTTP Forms (curl)

Time of First Successful Submission: 2026-05-24 10:49:12

HTTP Forms (netcat)

Time of First Successful Submission: 2026-05-24 11:18:18

HTTP Forms (python)

Time of First Successful Submission: 2026-05-24 11:28:10

HTTP Forms Without Forms

Time of First Successful Submission: 2026-05-24 11:30:20

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-05-24 12:05:34

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-05-24 12:22:51

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-05-24 12:26:54

HTTP Redirects (curl)

Time of First Successful Submission: 2026-05-24 12:31:32

HTTP Redirects (python)

Time of First Successful Submission: 2026-05-24 12:31:18

HTTP Cookies (curl)

Time of First Successful Submission: 2026-05-24 12:40:34

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-05-24 12:50:05

HTTP Cookies (python)

Time of First Successful Submission: 2026-05-24 12:54:03

Server State (python)

Time of First Successful Submission: 2026-05-24 12:54:50

Listening Web

Time of First Successful Submission: 2026-05-24 13:06:17

Speaking Redirects

Time of First Successful Submission: 2026-05-24 13:13:08

JavaScript Redirects

Time of First Successful Submission: 2026-05-24 22:04:21

Including JavaScript

Time of First Successful Submission: 2026-05-24 22:33:37

HTTP (javascript)

Time of First Successful Submission: 2026-05-24 22:55:43

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-05-25 13:02:36

HTTP Forms (javascript)

Time of First Successful Submission: 2026-05-25 13:19:54

cat

Time of First Successful Submission: 2026-05-25 13:33:21

more

Time of First Successful Submission: 2026-05-25 13:33:50

less

Time of First Successful Submission: 2026-05-25 13:34:07

tail

Time of First Successful Submission: 2026-05-25 13:35:14

head

Time of First Successful Submission: 2026-05-25 13:35:31

sort

Time of First Successful Submission: 2026-05-25 13:35:48

vim

Time of First Successful Submission: 2026-05-25 13:36:07

emacs

Time of First Successful Submission: 2026-05-25 13:36:53

nano

Time of First Successful Submission: 2026-05-25 13:37:17

rev

Time of First Successful Submission: 2026-05-25 13:37:44

od

Time of First Successful Submission: 2026-05-25 13:45:31

hd

Time of First Successful Submission: 2026-05-25 13:49:34

xxd

Time of First Successful Submission: 2026-05-25 13:50:06

base32

Time of First Successful Submission: 2026-05-25 13:50:34

base64

Time of First Successful Submission: 2026-05-25 13:50:50

split

Time of First Successful Submission: 2026-05-25 13:53:10

gzip

Time of First Successful Submission: 2026-05-25 14:09:29

bzip2

Time of First Successful Submission: 2026-05-25 14:10:28

zip

Time of First Successful Submission: 2026-05-25 14:19:52

tar

Time of First Successful Submission: 2026-05-25 14:22:47

ar

Time of First Successful Submission: 2026-05-25 14:25:13

cpio

Time of First Successful Submission: 2026-05-25 14:28:04

genisoimage

Time of First Successful Submission: 2026-05-25 15:20:06

env

Time of First Successful Submission: 2026-05-25 21:09:26

find

Time of First Successful Submission: 2026-05-25 21:22:09

make

Time of First Successful Submission: 2026-05-25 21:41:14

nice

Time of First Successful Submission: 2026-05-25 21:41:48

timeout

Time of First Successful Submission: 2026-05-25 21:42:41

stdbuf

Time of First Successful Submission: 2026-05-25 21:43:41

setarch

Time of First Successful Submission: 2026-05-25 21:44:59

watch

Time of First Successful Submission: 2026-05-25 21:46:41

socat

Time of First Successful Submission: 2026-05-25 23:53:11

whiptail

Time of First Successful Submission: 2026-05-26 13:50:15

awk

Time of First Successful Submission: 2026-05-26 13:54:22

sed

Time of First Successful Submission: 2026-05-26 13:55:19

ed

Time of First Successful Submission: 2026-05-26 14:03:45

chown

Time of First Successful Submission: 2026-05-26 14:04:06

chmod

Time of First Successful Submission: 2026-05-26 14:04:34

cp

Time of First Successful Submission: 2026-05-26 14:06:40

mv

Time of First Successful Submission: 2026-05-26 15:54:57

perl

Time of First Successful Submission: 2026-05-26 18:02:48

python

Time of First Successful Submission: 2026-05-26 18:04:05

ruby

Time of First Successful Submission: 2026-05-26 18:06:21

bash

Time of First Successful Submission: 2026-05-26 18:19:36

date

Time of First Successful Submission: 2026-05-26 18:36:02

dmesg

Time of First Successful Submission: 2026-05-26 18:41:17

wc

Time of First Successful Submission: 2026-05-26 18:42:22

gcc

Time of First Successful Submission: 2026-05-26 18:48:57

as

Time of First Successful Submission: 2026-05-26 18:49:42

wget

Time of First Successful Submission: 2026-05-26 19:26:23

ssh-keygen

Time of First Successful Submission: 2026-05-26 22:18:32

SQL Queries

Time of First Successful Submission: 2026-05-27 08:52:29

Filtering SQL

Time of First Successful Submission: 2026-05-27 08:58:56

Choosing Columns

Time of First Successful Submission: 2026-05-27 09:01:42

Exclusionary Filtering

Time of First Successful Submission: 2026-05-27 09:12:31

Filtering Strings

Time of First Successful Submission: 2026-05-27 09:18:19

Filtering on Expressions

Time of First Successful Submission: 2026-05-27 09:36:22

SELECTing Expressions

Time of First Successful Submission: 2026-05-27 10:30:32

Composite Conditions

Time of First Successful Submission: 2026-05-27 10:32:48

Reaching Your LIMITs

Time of First Successful Submission: 2026-05-27 10:36:34

Querying Metadata

Time of First Successful Submission: 2026-05-27 10:53:48


DSU Cyber Camps

12 / 104 2703 / 46788


Using the Terminal

Time of First Successful Submission: 2026-05-10 15:40:15

Using the VSCode Workspace

Time of First Successful Submission: 2026-05-10 15:45:24

Using the GUI Desktop

Time of First Successful Submission: 2026-05-10 15:46:27

Pasting into the Desktop

Time of First Successful Submission: 2026-05-10 15:43:26

Connecting over SSH

Time of First Successful Submission: 2026-05-10 18:44:48

Restarting Challenges

Time of First Successful Submission: 2026-05-10 18:47:26

Getting Help

Time of First Successful Submission: 2026-05-10 18:53:26

Challenge Programs

Time of First Successful Submission: 2026-05-10 18:55:16

The Flag File

Time of First Successful Submission: 2026-05-10 19:01:48

Using Privileged Mode

Time of First Successful Submission: 2026-05-10 19:09:44

Persistent Home Directories - One

Time of First Successful Submission: 2026-05-10 19:13:20

Persistent Home Directories - Two

Time of First Successful Submission: 2026-05-10 19:17:41


GCA CTF

12 / 104 2703 / 46788


Using the Terminal

Time of First Successful Submission: 2026-05-10 15:40:15

Using the VSCode Workspace

Time of First Successful Submission: 2026-05-10 15:45:24

Using the GUI Desktop

Time of First Successful Submission: 2026-05-10 15:46:27

Pasting into the Desktop

Time of First Successful Submission: 2026-05-10 15:43:26

Connecting over SSH

Time of First Successful Submission: 2026-05-10 18:44:48

Restarting Challenges

Time of First Successful Submission: 2026-05-10 18:47:26

Getting Help

Time of First Successful Submission: 2026-05-10 18:53:26

Challenge Programs

Time of First Successful Submission: 2026-05-10 18:55:16

The Flag File

Time of First Successful Submission: 2026-05-10 19:01:48

Using Privileged Mode

Time of First Successful Submission: 2026-05-10 19:09:44

Persistent Home Directories - One

Time of First Successful Submission: 2026-05-10 19:13:20

Persistent Home Directories - Two

Time of First Successful Submission: 2026-05-10 19:17:41