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Intro to Programming Languages

141 / 234 405 / 32010


Lecture 1.1. Course Environment

Time of First Successful Submission: 2026-03-24 06:59:19

Lab 1.1 - Start Terminal

Time of First Successful Submission: 2026-03-25 06:59:49

Lecture 1.2. Linux Shells

Time of First Successful Submission: 2026-03-25 07:03:32

Lecture 1.3. Linux File System

Time of First Successful Submission: 2026-03-25 07:08:01

Lecture 1.4. Executing Programs

Time of First Successful Submission: 2026-03-25 07:11:09

Lecture 1.5. Common Commands

Time of First Successful Submission: 2026-03-25 07:20:15

Lab 1.5.2 - Using ls and cd

Time of First Successful Submission: 2026-03-25 07:23:37

Lab 1.5.3 - Using grep

Time of First Successful Submission: 2026-03-25 07:25:23

Lecture 1.6. Redirection of I/O

Time of First Successful Submission: 2026-03-25 07:29:36

Lab 1.6 - Using grep and pipe

Time of First Successful Submission: 2026-03-25 07:34:50

Lecture 1.7. Regular Expressions

Time of First Successful Submission: 2026-03-25 07:39:14

Lecture 1.8. Misc Linux

Time of First Successful Submission: 2026-03-25 07:43:55

Lecture 1.9. Testing Code on pwn.college

Time of First Successful Submission: 2026-03-25 07:46:04

Lab 1.9 - Test some If Statements

Time of First Successful Submission: 2026-03-25 07:53:29

P1.0 Level 1 Open /flag in VSCode

Time of First Successful Submission: 2026-03-25 08:07:43

Commands

Time of First Successful Submission: 2026-02-26 13:33:29

Command Arguments

Time of First Successful Submission: 2026-02-26 13:34:14

Command History

Time of First Successful Submission: 2026-02-26 13:35:05

The Root Path

Time of First Successful Submission: 2026-02-26 14:47:38

Absolute Paths

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Changing position

Time of First Successful Submission: 2026-02-26 14:49:24

Changing to an Absolute Path

Time of First Successful Submission: 2026-02-26 14:51:07

Relative Paths

Time of First Successful Submission: 2026-02-26 14:52:53

P1.0 Level 5 read

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

Cat

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Ls

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Ls All

Time of First Successful Submission: 2026-02-27 08:08:57

P1.0 Level 2 list dir

Time of First Successful Submission: 2026-03-25 08:11:21

Find

Time of First Successful Submission: 2026-02-27 08:23:49

P1.0 Level 3 change dir

Time of First Successful Submission: 2026-03-25 08:12:19

P1.0 Level 4 move

Time of First Successful Submission: 2026-03-25 08:28:29

P1.0 Level 6 grep

Time of First Successful Submission: 2026-03-25 08:30:09

P1.0 Level 7 execute

Time of First Successful Submission: 2026-03-25 08:32:08

Piping Echo

Time of First Successful Submission: 2026-02-28 20:56:59

Piping Stdout

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Piping Stdin

Time of First Successful Submission: 2026-02-28 21:03:48

P1.0 Level 8 stdin

Time of First Successful Submission: 2026-03-25 08:33:52

P1.0 Level 9 pipe

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P1.0 Level 10 args

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P1.0 Level 11 gccpipe

Time of First Successful Submission: 2026-03-25 08:43:11

P1.0 Level 12 speedy

Time of First Successful Submission: 2026-03-25 08:50:36

P1.0 Level 13 testing

Time of First Successful Submission: 2026-03-25 09:36:59

P1.0 Level 14 ifs test

Time of First Successful Submission: 2026-03-25 11:04:12

Lecture 2.1.1.0 Paradigms and C

Time of First Successful Submission: 2026-03-25 11:17:49

Lecture 2.1.2. First C Program and Vars

Time of First Successful Submission: 2026-03-25 11:37:37

Lecture 2.1.2.1. Standard Output

Time of First Successful Submission: 2026-03-25 11:44:09

Lecture 2.1.2.2. Standard In

Time of First Successful Submission: 2026-03-25 11:48:05

Lab 2.1.2.1 - C Input

Time of First Successful Submission: 2026-03-25 20:57:17

Lecture 2.1.2.3. Flow Control & Command Line Arguments

Time of First Successful Submission: 2026-03-25 21:01:08

EzLab 2.1.2.3 - Control Flow

Time of First Successful Submission: 2026-03-25 21:13:05

Lecture 2.1.3.0 Dec & Def Functions

Time of First Successful Submission: 2026-03-25 21:16:03

Lecture 2.1.3.1. Globals & Locals

Time of First Successful Submission: 2026-03-25 21:20:13

Lecture 2.1.3.2. Function Params and Ret Vals

Time of First Successful Submission: 2026-03-25 21:26:25

EzLab 2.1.3.2 Pass by Value

Time of First Successful Submission: 2026-03-25 21:31:38

Lab 2.1.3.1 - Functions

Time of First Successful Submission: 2026-03-25 21:56:42

Lecture 2.1.4. Global and Local Memory

Time of First Successful Submission: 2026-03-25 22:00:35

Lecture 2.1.4.1. Function Frames

Time of First Successful Submission: 2026-03-25 22:19:05

Lecture 2.1.5. Debugging C Programs

Time of First Successful Submission: 2026-03-25 22:27:52

Lab 2.1.5.1 - Using VSCode Debugger

Time of First Successful Submission: 2026-03-25 22:46:50

P2.1 Level 01 C Force

Time of First Successful Submission: 2026-03-26 07:07:06

P2.1 Level 02 C Args

Time of First Successful Submission: 2026-03-26 07:13:45

P2.1 Level 03 scanf

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P2.1 Level 04 getchar

Time of First Successful Submission: 2026-03-26 08:11:20

P2.1 Level 05 add-n-sub

Time of First Successful Submission: 2026-03-26 08:59:39

P2.1 Level 06 debug me

Time of First Successful Submission: 2026-03-26 09:05:52

Lecture 2.2.1.1. C-Arrays

Time of First Successful Submission: 2026-03-26 09:37:13

Lecture 2.2.2. C-Strings

Time of First Successful Submission: 2026-03-26 09:47:14

Lab 2.2.2.0 - Print C-String by Character

Time of First Successful Submission: 2026-03-26 09:59:12

Lab 2.2.2.1 - Debugging with Seg Faults

Time of First Successful Submission: 2026-03-26 10:09:10

Lecture 2.2.3.1. Input to String

Time of First Successful Submission: 2026-03-26 10:15:53

Lecture 2.2.3.2 Using fgets

Time of First Successful Submission: 2026-03-26 10:22:17

Lecture 2.2.3.3. Input Buffer

Time of First Successful Submission: 2026-03-26 10:26:27

Lecture 2.2.4. File operations

Time of First Successful Submission: 2026-03-26 10:38:52

Lab 2.2.4.1 - LeeT CaSe

Time of First Successful Submission: 2026-03-26 11:10:19

Lecture 2.2.5.1. strlen

Time of First Successful Submission: 2026-03-26 11:13:26

EzLab 2.2.5.1 - String Length (strlen)

Time of First Successful Submission: 2026-03-26 11:18:31

Lecture 2.2.5.2. strcat

Time of First Successful Submission: 2026-03-26 11:21:21

EzLab 2.2.5.2 - String Concatenate (strcat)

Time of First Successful Submission: 2026-03-26 11:26:25

Lecture 2.2.5.3. strcmp

Time of First Successful Submission: 2026-03-26 11:30:26

EzLab 2.2.5.3 - String Compare (strcmp)

Time of First Successful Submission: 2026-03-26 11:35:05

Lecture 2.2.5.4. strcpy

Time of First Successful Submission: 2026-03-26 11:40:19

EzLab 2.2.5.4 - String Copy (strcpy/strncpy)

Time of First Successful Submission: 2026-03-26 11:51:44

Lecture 2.2.5.6. strspn

Time of First Successful Submission: 2026-03-26 11:56:23

Lab 2.2.5.6 - String Highlighter

Time of First Successful Submission: 2026-03-26 12:57:55

P2.2 Level 01 length

Time of First Successful Submission: 2026-03-26 17:54:01

P2.2 Level 02 c-cat

Time of First Successful Submission: 2026-03-26 18:23:48

P2.2 Level 03 c-copy

Time of First Successful Submission: 2026-03-26 18:43:01

P2.2 Level 04 c-compare

Time of First Successful Submission: 2026-03-26 19:06:51

P2.2 Level 05 c-up

Time of First Successful Submission: 2026-03-26 22:02:01

P2.2 Level 06 c-bugs

Time of First Successful Submission: 2026-03-26 22:28:51

P2.2 Level 07 c-debugger

Time of First Successful Submission: 2026-03-26 22:37:54

P2.2 Level 08 c-debugger2

Time of First Successful Submission: 2026-03-26 22:46:25

P2.2 Level 09 c-grind

Time of First Successful Submission: 2026-03-26 22:53:52

Lecture 2.3.1. Stack pointers

Time of First Successful Submission: 2026-03-26 23:04:50

Lab 2.3.1.0 - Print Non-printable Chars

Time of First Successful Submission: 2026-03-27 19:02:11

Lecture 2.3.2.0 Examples Single Value

Time of First Successful Submission: 2026-03-27 19:07:42

Lecture 2.3.2.1. Examples of Ptr to Array

Time of First Successful Submission: 2026-03-27 19:14:25

EzLab 2.3.2.1 - Character Pointers

Time of First Successful Submission: 2026-03-27 19:16:34

EzLab 2.3.2.1 - C-String Pointers

Time of First Successful Submission: 2026-03-27 19:21:02

Lecture 2.3.3.1. strstr video

Time of First Successful Submission: 2026-03-27 19:25:09

EzLab 2.3.3.1 - Find str in str (strstr)

Time of First Successful Submission: 2026-03-27 19:33:19

Lab 2.3.3.1 - Find Word Count

Time of First Successful Submission: 2026-03-27 20:17:42

Lecture 2.3.3.2. strtok video

Time of First Successful Submission: 2026-03-27 20:24:30

EzLab 2.3.3.2 - Get tokens (strtok)

Time of First Successful Submission: 2026-03-27 20:29:02

Lab 2.3.3.2 - Word Count

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

Lecture 2.3.3.3. strchr video

Time of First Successful Submission: 2026-03-27 21:16:46

Lecture 2.3.3.4. memset

Time of First Successful Submission: 2026-03-27 21:18:12

P2.3 Level 01 Pig Latin

Time of First Successful Submission: 2026-03-28 07:37:24

P2.3 Level 02 Pig Latin

Time of First Successful Submission: 2026-03-28 08:00:34

P2.3 Level 03 Pig Latin

Time of First Successful Submission: 2026-03-28 08:45:09

P2.3 Level 04 Pig Latin

Time of First Successful Submission: 2026-03-28 19:06:51

Lecture 2.4.1.1. struct into

Time of First Successful Submission: 2026-03-28 20:43:37

EzLab 2.4.1.1 - Using a struct

Time of First Successful Submission: 2026-03-28 20:48:11

Lecture 2.4.1.4. string to struct

Time of First Successful Submission: 2026-03-28 20:51:08

EzLab 2.4.1.4 - Struct from string

Time of First Successful Submission: 2026-03-28 20:59:07

Lecture 2.4.1.5. array of struct

Time of First Successful Submission: 2026-03-28 21:03:08

Lab 2.4.1.5 - Songs List

Time of First Successful Submission: 2026-03-28 22:11:03

Lecture 2.4.1.6. enum

Time of First Successful Submission: 2026-03-29 07:25:15

Lecture 2.4.2.1. C preprocessor

Time of First Successful Submission: 2026-03-29 07:28:42

EzLab 2.4.2.1 - C Preprocessor

Time of First Successful Submission: 2026-03-29 07:35:35

Lecture 2.4.2.2. Header files

Time of First Successful Submission: 2026-03-29 07:39:31

Lecture 2.4.2.6. Makefile

Time of First Successful Submission: 2026-03-29 07:44:49

EzLab 2.4.2.6 - Makefiles

Time of First Successful Submission: 2026-03-29 08:11:50

Lab 2.4.2.6 - Make Songs

Time of First Successful Submission: 2026-03-29 10:27:30

Lab 2.4.2.6 - Filter Songs

Time of First Successful Submission: 2026-03-29 11:25:10

Lecture 2.5.1.3. the heap

Time of First Successful Submission: 2026-03-29 11:36:14

Lecture 2.5.1.4. malloc an int

Time of First Successful Submission: 2026-03-29 11:39:16

Lecture 2.5.1.5. create a heap based array

Time of First Successful Submission: 2026-03-29 11:42:37

Lecture 2.5.1.6. free the heap

Time of First Successful Submission: 2026-03-29 11:44:44

EzLab 2.5.1.6 Heap

Time of First Successful Submission: 2026-03-29 12:05:29

Lab 2.5.1.6 - Stack on Heap

Time of First Successful Submission: 2026-03-29 12:21:32

Lecture 2.5.2.1. realloc

Time of First Successful Submission: 2026-03-29 12:24:16

Lecture 2.5.2.2. getline

Time of First Successful Submission: 2026-03-29 12:27:21

Lecture 2.5.2.3. strdup

Time of First Successful Submission: 2026-03-29 12:29:24

Lecture 2.5.2.4. struct malloc

Time of First Successful Submission: 2026-03-29 12:35:15

EzLab 2.5.2.4 Heap Based Array

Time of First Successful Submission: 2026-03-29 13:53:04

Lecture 2.6.1. Double Ptr Local

Time of First Successful Submission: 2026-03-30 18:02:06

Lecture 2.6.1.1. Double Ptr Heap

Time of First Successful Submission: 2026-03-30 18:11:09

Lecture 2.6.1.2. Triple Ptr Local

Time of First Successful Submission: 2026-03-30 18:14:50

Lecture 2.6.2.2. Pass-By-Address

Time of First Successful Submission: 2026-03-30 18:20:42

EzLab 2.6.2.2 Pass By Address

Time of First Successful Submission: 2026-03-30 18:22:44


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-02-26 13:09:46

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-26 13:11:48

Using the GUI Desktop

Time of First Successful Submission: 2026-02-26 13:14:03

Pasting into the Desktop

Time of First Successful Submission: 2026-02-26 13:15:59

Restarting Challenges

Time of First Successful Submission: 2026-02-26 13:20:55

Challenge Programs

Time of First Successful Submission: 2026-03-04 18:04:15

The Flag File

Time of First Successful Submission: 2026-03-04 18:05:55

Using Privileged Mode

Time of First Successful Submission: 2026-03-04 18:11:43

Persistent Home Directories - One

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Persistent Home Directories - Two

Time of First Successful Submission: 2026-03-04 18:15:09


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-02-26 13:33:29

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

Time of First Successful Submission: 2026-02-26 14:57:08

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

Time of First Successful Submission: 2026-02-26 19:55:44

removing files

Time of First Successful Submission: 2026-02-27 08:03:55

moving files

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copying files

Time of First Successful Submission: 2026-02-27 08:06:01

hidden files

Time of First Successful Submission: 2026-02-27 08:08:57

An Epic Filesystem Quest

Time of First Successful Submission: 2026-02-27 08:17:53

making directories

Time of First Successful Submission: 2026-02-27 08:18:56

finding files

Time of First Successful Submission: 2026-02-27 08:23:49

linking files

Time of First Successful Submission: 2026-02-27 08:34:49

Learning From Documentation

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Learning Complex Usage

Time of First Successful Submission: 2026-02-27 08:39:00

Reading Manuals

Time of First Successful Submission: 2026-02-28 10:02:45

Searching Manuals

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Searching For Manuals

Time of First Successful Submission: 2026-02-28 10:11:19

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: 2026-02-28 21:00:07

Redirecting errors

Time of First Successful Submission: 2026-02-28 21:02:13

Redirecting input

Time of First Successful Submission: 2026-02-28 21:03:48

Grepping stored results

Time of First Successful Submission: 2026-02-28 21:06:25

Grepping live output

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Grepping errors

Time of First Successful Submission: 2026-02-28 21:08:57

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: 2026-02-28 21:18:51

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

Time of First Successful Submission: 2026-03-01 06:40:35

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

Time of First Successful Submission: 2026-03-01 06:47:06

Reading Input

Time of First Successful Submission: 2026-03-01 06:49:30

Reading Files

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Translating characters

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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: 2026-03-04 03:43:40

Groups and Files

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Fun With Groups Names

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Changing Permissions

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

Executable Files

Time of First Successful Submission: 2026-03-04 04:20:07

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

Time of First Successful Submission: 2026-03-04 14:47:25

Executable Shell Scripts

Time of First Successful Submission: 2026-03-04 14:55:55

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

Time of First Successful Submission: 2026-03-05 07:42:06

Switching Windows

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Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-03-05 07:46:53

Switching Windows (tmux)

Time of First Successful Submission: 2026-03-05 07:49:22

The PATH Variable

Time of First Successful Submission: 2026-03-05 07:53:13

Setting PATH

Time of First Successful Submission: 2026-03-05 07:54:30

Finding Commands

Time of First Successful Submission: 2026-03-05 07:55:53

Adding Commands

Time of First Successful Submission: 2026-03-05 08:02:18

Hijacking Commands

Time of First Successful Submission: 2026-03-05 08:13:56

Bashrc Backdoor

Time of First Successful Submission: 2026-03-06 15:54:47

Sniffing Input

Time of First Successful Submission: 2026-03-06 16:07:44

Overshared Directories

Time of First Successful Submission: 2026-03-06 16:17:17

Tricky Linking

Time of First Successful Submission: 2026-03-06 17:11:21

Sniffing Process Arguments

Time of First Successful Submission: 2026-03-06 17:15:20

Snooping on Configurations

Time of First Successful Submission: 2026-03-06 17:52:30

The Fork Bomb

Time of First Successful Submission: 2026-03-06 18:18:56

Disk-Space Doomsday

Time of First Successful Submission: 2026-03-06 18:21:43

rm -rf /

Time of First Successful Submission: 2026-03-06 18:25:33

Life after rm -rf /

Time of First Successful Submission: 2026-03-06 18:46:43

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-03-06 18:56:32


Computing 101

80 / 94 681 / 21537


Your First Register

Time of First Successful Submission: 2026-03-07 08:37:31

Your First Syscall

Time of First Successful Submission: 2026-03-07 08:42:35

Exit Codes

Time of First Successful Submission: 2026-03-07 08:45:11

Building Executables

Time of First Successful Submission: 2026-03-07 08:50:57

Moving Between Registers

Time of First Successful Submission: 2026-03-07 08:53:59

Loading From Memory

Time of First Successful Submission: 2026-03-07 10:05:24

More Loading Practice

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

Dereferencing Pointers

Time of First Successful Submission: 2026-03-07 10:10:15

Dereferencing Yourself

Time of First Successful Submission: 2026-03-07 10:12:13

Dereferencing with Offsets

Time of First Successful Submission: 2026-03-07 10:20:25

Stored Addresses

Time of First Successful Submission: 2026-03-07 10:24:30

Double Dereference

Time of First Successful Submission: 2026-03-07 10:31:47

The Stack

Time of First Successful Submission: 2026-03-08 07:55:07

Stack Offsets

Time of First Successful Submission: 2026-03-08 07:56:56

Program Arguments on the Stack

Time of First Successful Submission: 2026-03-08 07:59:18

Popping From the Stack

Time of First Successful Submission: 2026-03-08 08:01:59

Disassembling Programs

Time of First Successful Submission: 2026-03-08 11:12:25

Tracing Syscalls

Time of First Successful Submission: 2026-03-08 11:17:17

Starting GDB

Time of First Successful Submission: 2026-03-08 11:19:10

Quitting GDB

Time of First Successful Submission: 2026-03-08 11:19:56

Starting Programs in GDB

Time of First Successful Submission: 2026-03-08 11:25:19

Disassembling in GDB

Time of First Successful Submission: 2026-03-08 11:38:07

Stepping Through Instructions

Time of First Successful Submission: 2026-03-08 11:40:50

Reading Register Values

Time of First Successful Submission: 2026-03-08 11:54:30

Popping Stack Values

Time of First Successful Submission: 2026-03-08 12:27:36

Examining Memory

Time of First Successful Submission: 2026-03-08 12:30:04

Examining Stack Pointers

Time of First Successful Submission: 2026-03-08 12:37:10

Cooperative Debugging

Time of First Successful Submission: 2026-03-08 12:44:05

Writing Output

Time of First Successful Submission: 2026-03-09 11:11:27

Chaining Syscalls

Time of First Successful Submission: 2026-03-09 11:13:30

Writing Strings

Time of First Successful Submission: 2026-03-09 11:15:32

Reading Data

Time of First Successful Submission: 2026-03-09 11:25:39

Opening Files

Time of First Successful Submission: 2026-03-09 11:38:22

Hardcoding the Filename

Time of First Successful Submission: 2026-03-09 11:45:04

Comparing Values

Time of First Successful Submission: 2026-03-09 13:14:22

Comparing Characters

Time of First Successful Submission: 2026-03-09 13:20:15

Conditional Control Flow

Time of First Successful Submission: 2026-03-09 13:34:41

Comparing Strings

Time of First Successful Submission: 2026-03-09 13:54:12

Reverse the Password

Time of First Successful Submission: 2026-03-09 14:02:42

Conditionals Without Conditionals

Time of First Successful Submission: 2026-03-09 15:00:28

Looping

Time of First Successful Submission: 2026-03-09 15:09:51

Reverse the Calculation

Time of First Successful Submission: 2026-03-10 03:46:12

Reverse the Reverse

Time of First Successful Submission: 2026-03-10 03:49:23

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-03-10 03:53:04

Loops on Data

Time of First Successful Submission: 2026-03-10 04:01:59

set-register

Time of First Successful Submission: 2026-03-10 05:33:54

set-multiple-registers

Time of First Successful Submission: 2026-03-10 05:38:18

add-to-register

Time of First Successful Submission: 2026-03-10 05:41:40

linear-equation-registers

Time of First Successful Submission: 2026-03-10 05:43:35

integer-division

Time of First Successful Submission: 2026-03-10 05:46:47

modulo-operation

Time of First Successful Submission: 2026-03-10 05:48:41

set-upper-byte

Time of First Successful Submission: 2026-03-10 05:50:04

efficient-modulo

Time of First Successful Submission: 2026-03-10 05:55:32

byte-extraction

Time of First Successful Submission: 2026-03-10 06:06:38

bitwise-and

Time of First Successful Submission: 2026-03-10 06:09:46

check-even

Time of First Successful Submission: 2026-03-10 21:35:17

memory-read

Time of First Successful Submission: 2026-03-10 21:43:35

memory-write

Time of First Successful Submission: 2026-03-10 21:45:06

memory-increment

Time of First Successful Submission: 2026-03-10 21:53:27

byte-access

Time of First Successful Submission: 2026-03-10 21:55:54

memory-size-access

Time of First Successful Submission: 2026-03-10 21:59:10

little-endian-write

Time of First Successful Submission: 2026-03-10 22:04:43

memory-sum

Time of First Successful Submission: 2026-03-10 22:18:58

stack-subtraction

Time of First Successful Submission: 2026-03-10 22:58:29

swap-stack-values

Time of First Successful Submission: 2026-03-10 23:03:12

average-stack-values

Time of First Successful Submission: 2026-03-11 09:43:55

absolute-jump

Time of First Successful Submission: 2026-03-11 09:49:14

relative-jump

Time of First Successful Submission: 2026-03-11 10:13:12

jump-trampoline

Time of First Successful Submission: 2026-03-11 10:16:32

conditional-jump

Time of First Successful Submission: 2026-03-11 12:55:20

indirect-jump

Time of First Successful Submission: 2026-03-12 04:33:48

average-loop

Time of First Successful Submission: 2026-03-12 04:48:24

count-non-zero

Time of First Successful Submission: 2026-03-12 05:02:02

string-lower

Time of First Successful Submission: 2026-03-17 11:21:21

most-common-byte

Time of First Successful Submission: 2026-03-21 20:53:11

Exit

Time of First Successful Submission: 2026-03-22 16:10:53

Socket

Time of First Successful Submission: 2026-03-22 17:16:28

Bind

Time of First Successful Submission: 2026-03-22 18:02:34

Listen

Time of First Successful Submission: 2026-03-22 18:15:44

Accept

Time of First Successful Submission: 2026-03-22 18:28:11


Playing With Programs

7 / 116 19210 / 23388


What's the password?

Time of First Successful Submission: 2026-03-11 15:24:37

... and again!

Time of First Successful Submission: 2026-03-11 15:25:39

Newline Troubles

Time of First Successful Submission: 2026-03-11 15:33:04

Reasoning about files

Time of First Successful Submission: 2026-03-11 15:41:02

Specifying Filenames

Time of First Successful Submission: 2026-03-11 15:44:52

Binary and Hex Encoding

Time of First Successful Submission: 2026-03-11 16:25:16

More Hex

Time of First Successful Submission: 2026-03-11 16:28:59


GCA CTF

12 / 104 1759 / 43659


Using the Terminal

Time of First Successful Submission: 2026-02-26 13:09:46

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-26 13:11:48

Using the GUI Desktop

Time of First Successful Submission: 2026-02-26 13:14:03

Pasting into the Desktop

Time of First Successful Submission: 2026-02-26 13:15:59

Connecting over SSH

Time of First Successful Submission: 2026-03-04 18:16:43

Restarting Challenges

Time of First Successful Submission: 2026-02-26 13:20:55

Getting Help

Time of First Successful Submission: 2026-03-04 18:18:23

Challenge Programs

Time of First Successful Submission: 2026-03-04 18:04:15

The Flag File

Time of First Successful Submission: 2026-03-04 18:05:55

Using Privileged Mode

Time of First Successful Submission: 2026-03-04 18:11:43

Persistent Home Directories - One

Time of First Successful Submission: 2026-03-04 18:14:04

Persistent Home Directories - Two

Time of First Successful Submission: 2026-03-04 18:15:09