Sourbud

🐧

Intro to Programming Languages

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P1.0 Level 1 Open /flag in VSCode

Time of First Successful Submission: 2026-02-10 10:37:04

Commands

Time of First Successful Submission: 2026-02-02 12:01:46

Command Arguments

Time of First Successful Submission: 2026-02-02 12:02:57

Command History

Time of First Successful Submission: 2026-02-02 12:04:22

The Root Path

Time of First Successful Submission: 2026-02-02 12:30:12

Absolute Paths

Time of First Successful Submission: 2026-02-03 15:53:06

Changing position

Time of First Successful Submission: 2026-02-03 16:25:31

Changing to an Absolute Path

Time of First Successful Submission: 2026-02-03 16:28:03

Relative Paths

Time of First Successful Submission: 2026-02-03 16:38:37

P1.0 Level 5 read

Time of First Successful Submission: 2026-02-10 10:43:54

Cat

Time of First Successful Submission: 2026-02-03 16:52:13

Ls

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Ls All

Time of First Successful Submission: 2026-02-03 17:23:32

P1.0 Level 2 list dir

Time of First Successful Submission: 2026-02-10 10:49:17

Find

Time of First Successful Submission: 2026-02-04 08:27:57

P1.0 Level 3 change dir

Time of First Successful Submission: 2026-02-10 11:00:30

P1.0 Level 4 move

Time of First Successful Submission: 2026-02-10 11:04:18

Piping Echo

Time of First Successful Submission: 2026-02-08 10:08:16

Piping Stdout

Time of First Successful Submission: 2026-02-08 10:11:11

Piping Stdin

Time of First Successful Submission: 2026-02-08 11:34:54

Start Here

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Using the Terminal

Time of First Successful Submission: 2026-02-02 10:07:06

Using the VSCode Workspace

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

Using the GUI Desktop

Time of First Successful Submission: 2026-02-02 10:16:55

Pasting into the Desktop

Time of First Successful Submission: 2026-02-02 10:22:49

Restarting Challenges

Time of First Successful Submission: 2026-02-02 10:34:27

Challenge Programs

Time of First Successful Submission: 2026-02-19 11:58:32

The Flag File

Time of First Successful Submission: 2026-02-19 12:02:58

Using Privileged Mode

Time of First Successful Submission: 2026-02-19 12:34:43

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-19 12:41:48

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-19 12:42:42

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-02-02 12:01:46

Intro to Arguments

Time of First Successful Submission: 2026-02-02 12:02:57

Command History

Time of First Successful Submission: 2026-02-02 12:04:22

The Root

Time of First Successful Submission: 2026-02-02 12:30:12

Program and absolute paths

Time of First Successful Submission: 2026-02-03 15:53:06

Position thy self

Time of First Successful Submission: 2026-02-03 16:25:31

Position elsewhere

Time of First Successful Submission: 2026-02-03 16:28:03

implicit relative paths, from /

Time of First Successful Submission: 2026-02-03 16:38:37

explicit relative paths, from /

Time of First Successful Submission: 2026-02-03 16:43:04

implicit relative path

Time of First Successful Submission: 2026-02-03 16:46:07

home sweet home

Time of First Successful Submission: 2026-02-03 16:49:29

cat: not the pet, but the command!

Time of First Successful Submission: 2026-02-03 16:52:13

catting absolute paths

Time of First Successful Submission: 2026-02-03 16:53:52

more catting practice

Time of First Successful Submission: 2026-02-03 16:55:13

grepping for a needle in a haystack

Time of First Successful Submission: 2026-02-03 17:06:13

comparing files

Time of First Successful Submission: 2026-02-03 17:08:53

listing files

Time of First Successful Submission: 2026-02-03 17:10:23

touching files

Time of First Successful Submission: 2026-02-03 17:13:14

removing files

Time of First Successful Submission: 2026-02-03 17:15:55

moving files

Time of First Successful Submission: 2026-02-03 17:17:36

copying files

Time of First Successful Submission: 2026-02-03 17:20:32

hidden files

Time of First Successful Submission: 2026-02-03 17:23:32

An Epic Filesystem Quest

Time of First Successful Submission: 2026-02-03 17:35:29

making directories

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finding files

Time of First Successful Submission: 2026-02-04 08:27:57

linking files

Time of First Successful Submission: 2026-02-04 12:33:38

Learning From Documentation

Time of First Successful Submission: 2026-02-06 13:21:13

Learning Complex Usage

Time of First Successful Submission: 2026-02-07 15:35:50

Reading Manuals

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Searching Manuals

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Searching For Manuals

Time of First Successful Submission: 2026-02-07 16:06:23

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

Time of First Successful Submission: 2026-02-08 06:09:08

Exclusionary globbing

Time of First Successful Submission: 2026-02-08 08:17:18

Tab completion

Time of First Successful Submission: 2026-02-08 08:19:56

Multiple options for tab completion

Time of First Successful Submission: 2026-02-08 08:29:42

Tab completion on commands

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

Redirecting output

Time of First Successful Submission: 2026-02-08 10:08:16

Redirecting more output

Time of First Successful Submission: 2026-02-08 10:11:11

Appending output

Time of First Successful Submission: 2026-02-08 11:01:00

Redirecting errors

Time of First Successful Submission: 2026-02-08 11:31:48

Redirecting input

Time of First Successful Submission: 2026-02-08 11:34:54

Grepping stored results

Time of First Successful Submission: 2026-02-08 11:53:10

Grepping live output

Time of First Successful Submission: 2026-02-08 12:40:08

Grepping errors

Time of First Successful Submission: 2026-02-08 12:50:22

Filtering with grep -v

Time of First Successful Submission: 2026-02-08 13:08:07

Filtering with sed

Time of First Successful Submission: 2026-02-08 13:12:28

Duplicating piped data with tee

Time of First Successful Submission: 2026-02-08 16:39:18

Process substitution for input

Time of First Successful Submission: 2026-02-08 17:00:17

Writing to multiple programs

Time of First Successful Submission: 2026-02-09 11:49:39

Split-piping stderr and stdout

Time of First Successful Submission: 2026-02-09 12:00:48

Named pipes

Time of First Successful Submission: 2026-02-09 14:27:40

Printing Variables

Time of First Successful Submission: 2026-02-09 14:31:58

Setting Variables

Time of First Successful Submission: 2026-02-09 14:36:52

Multi-word Variables

Time of First Successful Submission: 2026-02-09 14:38:49

Exporting Variables

Time of First Successful Submission: 2026-02-09 14:47:57

Printing Exported Variables

Time of First Successful Submission: 2026-02-09 14:50:00

Storing Command Output

Time of First Successful Submission: 2026-02-09 14:53:16

Reading Input

Time of First Successful Submission: 2026-02-09 15:23:51

Reading Files

Time of First Successful Submission: 2026-02-09 15:30:02

Translating characters

Time of First Successful Submission: 2026-02-09 15:49:53

Deleting characters

Time of First Successful Submission: 2026-02-09 15:53:43

Deleting newlines

Time of First Successful Submission: 2026-02-09 16:11:40

Extracting the first lines with head

Time of First Successful Submission: 2026-02-09 16:19:48

Extracting specific sections of text

Time of First Successful Submission: 2026-02-09 16:26:07

Sorting data

Time of First Successful Submission: 2026-02-09 16:29:50

Listing Processes

Time of First Successful Submission: 2026-02-09 16:47:23

Killing Processes

Time of First Successful Submission: 2026-02-09 16:52:03

Interrupting Processes

Time of First Successful Submission: 2026-02-09 16:53:53

Killing Misbehaving Processes

Time of First Successful Submission: 2026-02-09 17:01:10

Suspending Processes

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Resuming Processes

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Backgrounding Processes

Time of First Successful Submission: 2026-02-09 17:19:10

Foregrounding Processes

Time of First Successful Submission: 2026-02-09 17:46:34

Starting Backgrounded Processes

Time of First Successful Submission: 2026-02-09 17:48:52

Process Exit Codes

Time of First Successful Submission: 2026-02-09 17:55:12

Becoming root with su

Time of First Successful Submission: 2026-02-09 18:08:31

Other users with su

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

Cracking passwords

Time of First Successful Submission: 2026-02-10 10:18:00

Using sudo

Time of First Successful Submission: 2026-02-10 10:23:03

Changing File Ownership

Time of First Successful Submission: 2026-02-10 11:37:33

Groups and Files

Time of First Successful Submission: 2026-02-10 11:43:51

Fun With Groups Names

Time of First Successful Submission: 2026-02-10 11:46:42

Changing Permissions

Time of First Successful Submission: 2026-02-10 12:04:46

Executable Files

Time of First Successful Submission: 2026-02-10 12:15:17

Permission Tweaking Practice

Time of First Successful Submission: 2026-02-10 13:00:33

Permissions Setting Practice

Time of First Successful Submission: 2026-02-10 13:24:26

The SUID Bit

Time of First Successful Submission: 2026-02-10 13:32:11

Chaining with Semicolons

Time of First Successful Submission: 2026-02-10 13:36:14

Building on Success

Time of First Successful Submission: 2026-02-10 13:43:26

Handling Failure

Time of First Successful Submission: 2026-02-10 13:45:06

Your First Shell Script

Time of First Successful Submission: 2026-02-10 14:00:38

Redirecting Script Output

Time of First Successful Submission: 2026-02-10 14:17:24

Executable Shell Scripts

Time of First Successful Submission: 2026-02-10 14:27:50

Understanding Shebangs

Time of First Successful Submission: 2026-02-10 14:39:34

Scripting with Arguments

Time of First Successful Submission: 2026-02-10 14:45:22

Scripting with Conditionals

Time of First Successful Submission: 2026-02-10 14:54:02

Scripting with Default Cases

Time of First Successful Submission: 2026-02-10 14:59:24

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-02-10 15:05:18

Reading Shell Scripts

Time of First Successful Submission: 2026-02-10 15:14:18

Launching Screen

Time of First Successful Submission: 2026-02-10 15:55:02

Detaching and Attaching

Time of First Successful Submission: 2026-02-10 16:22:13

Finding Sessions

Time of First Successful Submission: 2026-02-10 16:26:11

Switching Windows

Time of First Successful Submission: 2026-02-10 16:29:43

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-02-10 16:35:08

Switching Windows (tmux)

Time of First Successful Submission: 2026-02-10 16:38:45

The PATH Variable

Time of First Successful Submission: 2026-02-10 16:51:06

Setting PATH

Time of First Successful Submission: 2026-02-10 16:55:24

Finding Commands

Time of First Successful Submission: 2026-02-10 17:04:05

Adding Commands

Time of First Successful Submission: 2026-02-10 17:42:35

Hijacking Commands

Time of First Successful Submission: 2026-02-10 17:49:24

Bashrc Backdoor

Time of First Successful Submission: 2026-02-12 13:01:27

Sniffing Input

Time of First Successful Submission: 2026-02-12 13:41:49

Overshared Directories

Time of First Successful Submission: 2026-02-14 12:33:24

Tricky Linking

Time of First Successful Submission: 2026-02-14 13:20:49

Sniffing Process Arguments

Time of First Successful Submission: 2026-02-14 13:26:44

Snooping on Configurations

Time of First Successful Submission: 2026-02-14 13:36:15

The Fork Bomb

Time of First Successful Submission: 2026-02-16 16:39:24

Disk-Space Doomsday

Time of First Successful Submission: 2026-02-16 16:52:50

rm -rf /

Time of First Successful Submission: 2026-02-17 16:24:42

Life after rm -rf /

Time of First Successful Submission: 2026-02-17 17:09:18

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-02-18 03:35:38

Computing 101

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Your First Register

Time of First Successful Submission: 2026-02-22 16:35:24

Your First Syscall

Time of First Successful Submission: 2026-02-22 17:04:24

Exit Codes

Time of First Successful Submission: 2026-02-22 17:10:45

Building Executables

Time of First Successful Submission: 2026-02-22 17:30:11

Moving Between Registers

Time of First Successful Submission: 2026-02-22 17:40:39

Loading From Memory

Time of First Successful Submission: 2026-02-27 17:27:10

More Loading Practice

Time of First Successful Submission: 2026-02-27 17:30:45

Dereferencing Pointers

Time of First Successful Submission: 2026-02-27 17:43:49

Dereferencing Yourself

Time of First Successful Submission: 2026-02-28 03:44:27

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-28 03:52:17

Stored Addresses

Time of First Successful Submission: 2026-02-28 04:07:14

Double Dereference

Time of First Successful Submission: 2026-02-28 04:28:49

The Stack

Time of First Successful Submission: 2026-02-28 11:09:46

Stack Offsets

Time of First Successful Submission: 2026-02-28 12:11:09

Program Arguments on the Stack

Time of First Successful Submission: 2026-02-28 12:13:50

Popping From the Stack

Time of First Successful Submission: 2026-02-28 12:20:51

Disassembling Programs

Time of First Successful Submission: 2026-02-28 13:36:51

Tracing Syscalls

Time of First Successful Submission: 2026-02-28 13:42:46

Starting GDB

Time of First Successful Submission: 2026-02-28 17:25:08

Quitting GDB

Time of First Successful Submission: 2026-02-28 17:26:18

Starting Programs in GDB

Time of First Successful Submission: 2026-02-28 17:34:15

Disassembling in GDB

Time of First Successful Submission: 2026-02-28 17:36:57

Stepping Through Instructions

Time of First Successful Submission: 2026-02-28 17:39:57

Reading Register Values

Time of First Successful Submission: 2026-02-28 17:41:55

Popping Stack Values

Time of First Successful Submission: 2026-02-28 17:47:24

Examining Memory

Time of First Successful Submission: 2026-02-28 17:54:45

Examining Stack Pointers

Time of First Successful Submission: 2026-02-28 18:04:23

Cooperative Debugging

Time of First Successful Submission: 2026-03-01 04:44:55

Writing Output

Time of First Successful Submission: 2026-03-03 16:51:02

Chaining Syscalls

Time of First Successful Submission: 2026-03-03 16:54:56

Writing Strings

Time of First Successful Submission: 2026-03-03 16:57:53

Reading Data

Time of First Successful Submission: 2026-03-03 17:09:15

Opening Files

Time of First Successful Submission: 2026-03-03 17:31:23

Hardcoding the Filename

Time of First Successful Submission: 2026-03-04 17:18:39

Comparing Values

Time of First Successful Submission: 2026-03-05 12:00:33

Comparing Characters

Time of First Successful Submission: 2026-03-05 13:41:45

Conditional Control Flow

Time of First Successful Submission: 2026-03-05 14:57:46

Comparing Strings

Time of First Successful Submission: 2026-03-05 15:55:46

Reverse the Password

Time of First Successful Submission: 2026-03-05 16:13:42

Conditionals Without Conditionals

Time of First Successful Submission: 2026-03-07 15:22:12

Looping

Time of First Successful Submission: 2026-03-07 17:03:12

Reverse the Calculation

Time of First Successful Submission: 2026-03-07 17:20:55

Reverse the Reverse

Time of First Successful Submission: 2026-03-07 17:29:32

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-03-07 18:26:58

Loops on Data

Time of First Successful Submission: 2026-03-08 03:29:32

set-register

Time of First Successful Submission: 2026-03-08 04:35:01

set-multiple-registers

Time of First Successful Submission: 2026-03-08 04:39:31

add-to-register

Time of First Successful Submission: 2026-03-08 04:42:21

linear-equation-registers

Time of First Successful Submission: 2026-03-08 04:46:24

integer-division

Time of First Successful Submission: 2026-03-08 04:53:23

modulo-operation

Time of First Successful Submission: 2026-03-08 05:00:40

set-upper-byte

Time of First Successful Submission: 2026-03-08 05:04:34

efficient-modulo

Time of First Successful Submission: 2026-03-08 05:22:23

byte-extraction

Time of First Successful Submission: 2026-03-08 11:06:34

bitwise-and

Time of First Successful Submission: 2026-03-08 11:47:22

check-even

Time of First Successful Submission: 2026-03-08 18:30:16

memory-read

Time of First Successful Submission: 2026-03-09 14:47:02

memory-write

Time of First Successful Submission: 2026-03-09 14:49:18

memory-increment

Time of First Successful Submission: 2026-03-09 14:54:26

byte-access

Time of First Successful Submission: 2026-03-09 15:01:04

memory-size-access

Time of First Successful Submission: 2026-03-09 15:38:35

little-endian-write

Time of First Successful Submission: 2026-03-09 15:57:30

memory-sum

Time of First Successful Submission: 2026-03-09 16:05:58

stack-subtraction

Time of First Successful Submission: 2026-03-10 13:25:21

swap-stack-values

Time of First Successful Submission: 2026-03-10 13:30:33

average-stack-values

Time of First Successful Submission: 2026-03-10 14:45:06

absolute-jump

Time of First Successful Submission: 2026-03-11 06:43:12

relative-jump

Time of First Successful Submission: 2026-03-11 06:53:07

jump-trampoline

Time of First Successful Submission: 2026-03-11 06:56:52

Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-02-20 13:38:51

... and again!

Time of First Successful Submission: 2026-02-20 13:40:18

Newline Troubles

Time of First Successful Submission: 2026-02-20 13:44:56

Reasoning about files

Time of First Successful Submission: 2026-02-20 13:53:52

Specifying Filenames

Time of First Successful Submission: 2026-02-20 15:15:14

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-02-02 10:07:06

Using the VSCode Workspace

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

Using the GUI Desktop

Time of First Successful Submission: 2026-02-02 10:16:55

Pasting into the Desktop

Time of First Successful Submission: 2026-02-02 10:22:49

Restarting Challenges

Time of First Successful Submission: 2026-02-02 10:34:27

Challenge Programs

Time of First Successful Submission: 2026-02-19 11:58:32

The Flag File

Time of First Successful Submission: 2026-02-19 12:02:58

Using Privileged Mode

Time of First Successful Submission: 2026-02-19 12:34:43

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-19 12:41:48

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-19 12:42:42