Yes2Me

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Intro to Programming Languages

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Commands

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

Command Arguments

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Command History

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The Root Path

Time of First Successful Submission: 2026-02-16 08:34:01

Absolute Paths

Time of First Successful Submission: 2026-02-16 08:34:36

Changing position

Time of First Successful Submission: 2026-02-16 08:36:37

Changing to an Absolute Path

Time of First Successful Submission: 2026-02-16 08:38:36

Relative Paths

Time of First Successful Submission: 2026-02-16 08:42:58

Cat

Time of First Successful Submission: 2026-02-16 08:49:38

Ls

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Ls All

Time of First Successful Submission: 2026-02-16 09:01:34

Find

Time of First Successful Submission: 2026-02-16 11:23:11

Piping Echo

Time of First Successful Submission: 2026-02-16 15:18:33

Piping Stdout

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Piping Stdin

Time of First Successful Submission: 2026-02-16 15:30:07


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-02-16 07:28:16

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-16 07:32:01

Using the GUI Desktop

Time of First Successful Submission: 2026-02-16 07:35:42

Pasting into the Desktop

Time of First Successful Submission: 2026-02-16 07:37:51

Restarting Challenges

Time of First Successful Submission: 2026-02-16 07:41:23

Challenge Programs

Time of First Successful Submission: 2026-02-17 16:12:19

The Flag File

Time of First Successful Submission: 2026-02-17 16:13:46

Using Privileged Mode

Time of First Successful Submission: 2026-02-17 16:17:03

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-17 16:19:54

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-17 16:20:51


Linux Luminarium

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Intro to Commands

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

Intro to Arguments

Time of First Successful Submission: 2026-02-16 08:09:23

Command History

Time of First Successful Submission: 2026-02-16 08:09:57

The Root

Time of First Successful Submission: 2026-02-16 08:34:01

Program and absolute paths

Time of First Successful Submission: 2026-02-16 08:34:36

Position thy self

Time of First Successful Submission: 2026-02-16 08:36:37

Position elsewhere

Time of First Successful Submission: 2026-02-16 08:38:36

implicit relative paths, from /

Time of First Successful Submission: 2026-02-16 08:42:58

explicit relative paths, from /

Time of First Successful Submission: 2026-02-16 08:43:58

implicit relative path

Time of First Successful Submission: 2026-02-16 08:45:28

home sweet home

Time of First Successful Submission: 2026-02-16 08:47:37

cat: not the pet, but the command!

Time of First Successful Submission: 2026-02-16 08:49:38

catting absolute paths

Time of First Successful Submission: 2026-02-16 08:50:41

more catting practice

Time of First Successful Submission: 2026-02-16 08:51:41

grepping for a needle in a haystack

Time of First Successful Submission: 2026-02-16 08:52:49

comparing files

Time of First Successful Submission: 2026-02-16 08:55:21

listing files

Time of First Successful Submission: 2026-02-16 08:56:28

touching files

Time of First Successful Submission: 2026-02-16 08:57:32

removing files

Time of First Successful Submission: 2026-02-16 08:58:18

moving files

Time of First Successful Submission: 2026-02-16 08:59:28

copying files

Time of First Successful Submission: 2026-02-16 09:00:16

hidden files

Time of First Successful Submission: 2026-02-16 09:01:34

An Epic Filesystem Quest

Time of First Successful Submission: 2026-02-16 11:14:48

making directories

Time of First Successful Submission: 2026-02-16 11:16:06

finding files

Time of First Successful Submission: 2026-02-16 11:23:11

linking files

Time of First Successful Submission: 2026-02-16 12:25:49

Learning From Documentation

Time of First Successful Submission: 2026-02-16 12:40:14

Learning Complex Usage

Time of First Successful Submission: 2026-02-16 12:47:32

Reading Manuals

Time of First Successful Submission: 2026-02-16 12:55:52

Searching Manuals

Time of First Successful Submission: 2026-02-16 12:58:57

Searching For Manuals

Time of First Successful Submission: 2026-02-16 13:36:52

Helpful Programs

Time of First Successful Submission: 2026-02-16 13:38:32

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 []

Time of First Successful Submission: 2026-02-16 13:53:08

Multiple globs

Time of First Successful Submission: 2026-02-16 13:55:00

Mixing globs

Time of First Successful Submission: 2026-02-16 14:59:29

Exclusionary globbing

Time of First Successful Submission: 2026-02-16 15:06:32

Tab completion

Time of First Successful Submission: 2026-02-16 15:08:02

Multiple options for tab completion

Time of First Successful Submission: 2026-02-16 15:11:02

Tab completion on commands

Time of First Successful Submission: 2026-02-16 15:11:37

Redirecting output

Time of First Successful Submission: 2026-02-16 15:18:33

Redirecting more output

Time of First Successful Submission: 2026-02-16 15:20:20

Appending output

Time of First Successful Submission: 2026-02-16 15:25:35

Redirecting errors

Time of First Successful Submission: 2026-02-16 15:29:03

Redirecting input

Time of First Successful Submission: 2026-02-16 15:30:07

Grepping stored results

Time of First Successful Submission: 2026-02-16 15:31:47

Grepping live output

Time of First Successful Submission: 2026-02-16 15:32:27

Grepping errors

Time of First Successful Submission: 2026-02-16 16:30:37

Filtering with grep -v

Time of First Successful Submission: 2026-02-16 16:33:26

Filtering with sed

Time of First Successful Submission: 2026-02-16 16:37:01

Duplicating piped data with tee

Time of First Successful Submission: 2026-02-16 16:42:33

Process substitution for input

Time of First Successful Submission: 2026-02-16 16:51:57

Writing to multiple programs

Time of First Successful Submission: 2026-02-16 16:59:09

Split-piping stderr and stdout

Time of First Successful Submission: 2026-02-16 17:11:57

Named pipes

Time of First Successful Submission: 2026-02-16 17:21:21

Printing Variables

Time of First Successful Submission: 2026-02-16 23:36:30

Setting Variables

Time of First Successful Submission: 2026-02-16 23:39:26

Multi-word Variables

Time of First Successful Submission: 2026-02-16 23:40:11

Exporting Variables

Time of First Successful Submission: 2026-02-16 23:43:29

Printing Exported Variables

Time of First Successful Submission: 2026-02-16 23:44:12

Storing Command Output

Time of First Successful Submission: 2026-02-16 23:48:52

Reading Input

Time of First Successful Submission: 2026-02-16 23:51:55

Reading Files

Time of First Successful Submission: 2026-02-16 23:58:49

Translating characters

Time of First Successful Submission: 2026-02-17 00:08:24

Deleting characters

Time of First Successful Submission: 2026-02-17 00:09:16

Deleting newlines

Time of First Successful Submission: 2026-02-17 00:12:50

Extracting the first lines with head

Time of First Successful Submission: 2026-02-17 00:15:17

Extracting specific sections of text

Time of First Successful Submission: 2026-02-17 00:19:34

Sorting data

Time of First Successful Submission: 2026-02-17 00:21:28

Listing Processes

Time of First Successful Submission: 2026-02-17 14:21:51

Killing Processes

Time of First Successful Submission: 2026-02-17 14:23:38

Interrupting Processes

Time of First Successful Submission: 2026-02-17 14:24:35

Killing Misbehaving Processes

Time of First Successful Submission: 2026-02-17 14:28:02

Suspending Processes

Time of First Successful Submission: 2026-02-17 14:28:44

Resuming Processes

Time of First Successful Submission: 2026-02-17 14:29:17

Backgrounding Processes

Time of First Successful Submission: 2026-02-17 14:33:34

Foregrounding Processes

Time of First Successful Submission: 2026-02-17 14:35:19

Starting Backgrounded Processes

Time of First Successful Submission: 2026-02-17 14:36:08

Process Exit Codes

Time of First Successful Submission: 2026-02-17 14:39:16

Becoming root with su

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Other users with su

Time of First Successful Submission: 2026-02-17 14:48:47

Cracking passwords

Time of First Successful Submission: 2026-02-17 15:56:34

Using sudo

Time of First Successful Submission: 2026-02-17 16:00:08

Changing File Ownership

Time of First Successful Submission: 2026-02-18 04:09:04

Groups and Files

Time of First Successful Submission: 2026-02-18 04:16:34

Fun With Groups Names

Time of First Successful Submission: 2026-02-18 04:19:01

Changing Permissions

Time of First Successful Submission: 2026-02-18 04:27:28

Executable Files

Time of First Successful Submission: 2026-02-18 04:31:32

Permission Tweaking Practice

Time of First Successful Submission: 2026-02-18 04:43:45

Permissions Setting Practice

Time of First Successful Submission: 2026-02-18 06:17:41

The SUID Bit

Time of First Successful Submission: 2026-02-18 06:21:19

Chaining with Semicolons

Time of First Successful Submission: 2026-02-18 06:23:00

Building on Success

Time of First Successful Submission: 2026-02-18 06:24:24

Handling Failure

Time of First Successful Submission: 2026-02-18 06:25:27

Your First Shell Script

Time of First Successful Submission: 2026-02-18 06:28:02

Redirecting Script Output

Time of First Successful Submission: 2026-02-18 06:29:55

Executable Shell Scripts

Time of First Successful Submission: 2026-02-18 06:32:02

Understanding Shebangs

Time of First Successful Submission: 2026-02-18 06:37:08

Scripting with Arguments

Time of First Successful Submission: 2026-02-18 06:39:11

Scripting with Conditionals

Time of First Successful Submission: 2026-02-18 06:45:19

Scripting with Default Cases

Time of First Successful Submission: 2026-02-18 06:46:50

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-02-18 06:51:11

Reading Shell Scripts

Time of First Successful Submission: 2026-02-18 06:59:25

Launching Screen

Time of First Successful Submission: 2026-02-18 07:00:59

Detaching and Attaching

Time of First Successful Submission: 2026-02-18 07:03:38

Finding Sessions

Time of First Successful Submission: 2026-02-18 07:06:07

Switching Windows

Time of First Successful Submission: 2026-02-18 07:08:27

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-02-18 07:37:14

Switching Windows (tmux)

Time of First Successful Submission: 2026-02-18 07:39:32

The PATH Variable

Time of First Successful Submission: 2026-02-18 07:43:54

Setting PATH

Time of First Successful Submission: 2026-02-18 07:45:11

Finding Commands

Time of First Successful Submission: 2026-02-18 07:48:31

Adding Commands

Time of First Successful Submission: 2026-02-18 08:01:41

Hijacking Commands

Time of First Successful Submission: 2026-02-18 08:14:41

Bashrc Backdoor

Time of First Successful Submission: 2026-02-18 08:25:42

Sniffing Input

Time of First Successful Submission: 2026-02-18 13:16:02

Overshared Directories

Time of First Successful Submission: 2026-02-18 13:40:55

Tricky Linking

Time of First Successful Submission: 2026-02-18 14:41:50

Sniffing Process Arguments

Time of First Successful Submission: 2026-02-18 15:07:09

Snooping on Configurations

Time of First Successful Submission: 2026-02-18 15:32:13

The Fork Bomb

Time of First Successful Submission: 2026-02-18 16:37:24

Disk-Space Doomsday

Time of First Successful Submission: 2026-02-18 16:49:03

rm -rf /

Time of First Successful Submission: 2026-02-18 16:57:05

Life after rm -rf /

Time of First Successful Submission: 2026-02-18 17:03:12

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-02-18 17:07:28


Computing 101

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Your First Register

Time of First Successful Submission: 2026-02-19 10:44:30

Your First Syscall

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Exit Codes

Time of First Successful Submission: 2026-02-19 10:52:49

Building Executables

Time of First Successful Submission: 2026-02-19 10:58:51

Moving Between Registers

Time of First Successful Submission: 2026-02-19 11:01:35

Loading From Memory

Time of First Successful Submission: 2026-02-23 08:04:32

More Loading Practice

Time of First Successful Submission: 2026-02-23 08:15:51

Dereferencing Pointers

Time of First Successful Submission: 2026-02-23 08:18:42

Dereferencing Yourself

Time of First Successful Submission: 2026-02-23 08:21:16

Dereferencing with Offsets

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Stored Addresses

Time of First Successful Submission: 2026-02-23 08:29:07

Double Dereference

Time of First Successful Submission: 2026-02-23 08:39:51

The Stack

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Stack Offsets

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Program Arguments on the Stack

Time of First Successful Submission: 2026-02-23 08:56:11

Popping From the Stack

Time of First Successful Submission: 2026-02-23 08:59:09

Disassembling Programs

Time of First Successful Submission: 2026-02-23 14:50:41

Tracing Syscalls

Time of First Successful Submission: 2026-02-23 14:57:15

Starting GDB

Time of First Successful Submission: 2026-02-23 15:01:50

Quitting GDB

Time of First Successful Submission: 2026-02-23 15:03:42

Starting Programs in GDB

Time of First Successful Submission: 2026-02-23 15:05:31

Disassembling in GDB

Time of First Successful Submission: 2026-02-23 15:07:05

Stepping Through Instructions

Time of First Successful Submission: 2026-02-23 15:10:48

Reading Register Values

Time of First Successful Submission: 2026-02-23 15:12:35

Popping Stack Values

Time of First Successful Submission: 2026-02-23 15:18:39

Examining Memory

Time of First Successful Submission: 2026-02-23 15:22:16

Examining Stack Pointers

Time of First Successful Submission: 2026-02-23 15:24:56

Cooperative Debugging

Time of First Successful Submission: 2026-02-23 15:40:49


GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-02-16 07:28:16

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-16 07:32:01

Using the GUI Desktop

Time of First Successful Submission: 2026-02-16 07:35:42

Pasting into the Desktop

Time of First Successful Submission: 2026-02-16 07:37:51

Restarting Challenges

Time of First Successful Submission: 2026-02-16 07:41:23

Getting Help

Time of First Successful Submission: 2026-02-16 07:44:31

Challenge Programs

Time of First Successful Submission: 2026-02-17 16:12:19

The Flag File

Time of First Successful Submission: 2026-02-17 16:13:46

Using Privileged Mode

Time of First Successful Submission: 2026-02-17 16:17:03

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-17 16:19:54

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-17 16:20:51