skiddad

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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-03-01 18:07:04

Command Arguments

Time of First Successful Submission: 2026-03-01 18:07:55

Command History

Time of First Successful Submission: 2026-03-01 18:08:23

The Root Path

Time of First Successful Submission: 2026-03-03 02:39:39

Absolute Paths

Time of First Successful Submission: 2026-03-03 02:40:15

Changing position

Time of First Successful Submission: 2026-03-03 02:45:01

Changing to an Absolute Path

Time of First Successful Submission: 2026-03-03 02:50:20

Relative Paths

Time of First Successful Submission: 2026-03-03 02:51:58

Cat

Time of First Successful Submission: 2026-03-03 03:47:30

Ls

Time of First Successful Submission: 2026-03-03 03:53:30

Ls All

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

Find

Time of First Successful Submission: 2026-03-03 05:20:44

Piping Echo

Time of First Successful Submission: 2026-03-05 20:03:57

Piping Stdout

Time of First Successful Submission: 2026-03-05 20:06:56

Piping Stdin

Time of First Successful Submission: 2026-03-05 20:13:55


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-02-28 22:44:40

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-28 22:47:36

Using the GUI Desktop

Time of First Successful Submission: 2026-02-28 22:50:28

Pasting into the Desktop

Time of First Successful Submission: 2026-02-28 22:51:57

Restarting Challenges

Time of First Successful Submission: 2026-02-28 23:47:32

Challenge Programs

Time of First Successful Submission: 2026-02-28 23:48:56

The Flag File

Time of First Successful Submission: 2026-02-28 23:50:07

Using Privileged Mode

Time of First Successful Submission: 2026-03-01 05:16:46

Persistent Home Directories - One

Time of First Successful Submission: 2026-03-01 18:04:07

Persistent Home Directories - Two

Time of First Successful Submission: 2026-03-01 18:05:12


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-03-01 18:07:04

Intro to Arguments

Time of First Successful Submission: 2026-03-01 18:07:55

Command History

Time of First Successful Submission: 2026-03-01 18:08:23

The Root

Time of First Successful Submission: 2026-03-03 02:39:39

Program and absolute paths

Time of First Successful Submission: 2026-03-03 02:40:15

Position thy self

Time of First Successful Submission: 2026-03-03 02:45:01

Position elsewhere

Time of First Successful Submission: 2026-03-03 02:50:20

implicit relative paths, from /

Time of First Successful Submission: 2026-03-03 02:51:58

explicit relative paths, from /

Time of First Successful Submission: 2026-03-03 02:53:05

implicit relative path

Time of First Successful Submission: 2026-03-03 02:54:14

home sweet home

Time of First Successful Submission: 2026-03-03 03:46:19

cat: not the pet, but the command!

Time of First Successful Submission: 2026-03-03 03:47:30

catting absolute paths

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

more catting practice

Time of First Successful Submission: 2026-03-03 03:48:53

grepping for a needle in a haystack

Time of First Successful Submission: 2026-03-03 03:50:02

comparing files

Time of First Successful Submission: 2026-03-03 03:51:53

listing files

Time of First Successful Submission: 2026-03-03 03:53:30

touching files

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

removing files

Time of First Successful Submission: 2026-03-03 03:54:58

moving files

Time of First Successful Submission: 2026-03-03 05:00:41

copying files

Time of First Successful Submission: 2026-03-03 05:01:17

hidden files

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

An Epic Filesystem Quest

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

making directories

Time of First Successful Submission: 2026-03-03 05:15:21

finding files

Time of First Successful Submission: 2026-03-03 05:20:44

linking files

Time of First Successful Submission: 2026-03-04 02:33:36

Learning From Documentation

Time of First Successful Submission: 2026-03-04 03:41:17

Learning Complex Usage

Time of First Successful Submission: 2026-03-04 03:50:29

Reading Manuals

Time of First Successful Submission: 2026-03-04 03:53:40

Searching Manuals

Time of First Successful Submission: 2026-03-04 03:55:29

Searching For Manuals

Time of First Successful Submission: 2026-03-04 05:17:34

Helpful Programs

Time of First Successful Submission: 2026-03-04 04:28:13

Help for Builtins

Time of First Successful Submission: 2026-03-04 04:34:36

Matching with *

Time of First Successful Submission: 2026-03-05 07:10:51

Matching with ?

Time of First Successful Submission: 2026-03-05 07:11:43

Matching with []

Time of First Successful Submission: 2026-03-05 07:13:45

Matching paths with []

Time of First Successful Submission: 2026-03-05 07:14:58

Multiple globs

Time of First Successful Submission: 2026-03-05 07:17:18

Mixing globs

Time of First Successful Submission: 2026-03-05 07:27:29

Exclusionary globbing

Time of First Successful Submission: 2026-03-05 07:28:21

Tab completion

Time of First Successful Submission: 2026-03-05 07:30:00

Multiple options for tab completion

Time of First Successful Submission: 2026-03-05 07:34:10

Tab completion on commands

Time of First Successful Submission: 2026-03-05 07:34:44

Redirecting output

Time of First Successful Submission: 2026-03-05 20:03:57

Redirecting more output

Time of First Successful Submission: 2026-03-05 20:06:56

Appending output

Time of First Successful Submission: 2026-03-05 20:09:09

Redirecting errors

Time of First Successful Submission: 2026-03-05 20:12:15

Redirecting input

Time of First Successful Submission: 2026-03-05 20:13:55

Grepping stored results

Time of First Successful Submission: 2026-03-05 20:17:11

Grepping live output

Time of First Successful Submission: 2026-03-05 20:18:50

Grepping errors

Time of First Successful Submission: 2026-03-05 20:21:33

Filtering with grep -v

Time of First Successful Submission: 2026-03-05 20:25:14

Filtering with sed

Time of First Successful Submission: 2026-03-05 20:26:23

Duplicating piped data with tee

Time of First Successful Submission: 2026-03-05 20:32:48

Process substitution for input

Time of First Successful Submission: 2026-03-05 20:38:04

Writing to multiple programs

Time of First Successful Submission: 2026-03-05 20:47:40

Split-piping stderr and stdout

Time of First Successful Submission: 2026-03-06 03:50:37

Named pipes

Time of First Successful Submission: 2026-03-06 03:57:26

Printing Variables

Time of First Successful Submission: 2026-03-06 03:59:30

Setting Variables

Time of First Successful Submission: 2026-03-06 04:00:39

Multi-word Variables

Time of First Successful Submission: 2026-03-06 04:01:22

Exporting Variables

Time of First Successful Submission: 2026-03-06 04:10:48

Printing Exported Variables

Time of First Successful Submission: 2026-03-06 04:11:26

Storing Command Output

Time of First Successful Submission: 2026-03-06 04:12:25

Reading Input

Time of First Successful Submission: 2026-03-06 04:15:01

Reading Files

Time of First Successful Submission: 2026-03-07 02:06:13

Translating characters

Time of First Successful Submission: 2026-03-07 02:13:34

Deleting characters

Time of First Successful Submission: 2026-03-07 02:14:16

Deleting newlines

Time of First Successful Submission: 2026-03-07 02:15:50

Extracting the first lines with head

Time of First Successful Submission: 2026-03-07 02:16:57

Extracting specific sections of text

Time of First Successful Submission: 2026-03-07 02:19:32

Sorting data

Time of First Successful Submission: 2026-03-07 02:20:26

Listing Processes

Time of First Successful Submission: 2026-03-07 04:12:21

Killing Processes

Time of First Successful Submission: 2026-03-07 04:13:43

Interrupting Processes

Time of First Successful Submission: 2026-03-07 04:14:14

Killing Misbehaving Processes

Time of First Successful Submission: 2026-03-07 04:28:34

Suspending Processes

Time of First Successful Submission: 2026-03-07 04:29:26

Resuming Processes

Time of First Successful Submission: 2026-03-07 04:30:03

Backgrounding Processes

Time of First Successful Submission: 2026-03-07 04:38:00

Foregrounding Processes

Time of First Successful Submission: 2026-03-07 04:39:22

Starting Backgrounded Processes

Time of First Successful Submission: 2026-03-07 04:40:00

Process Exit Codes

Time of First Successful Submission: 2026-03-07 04:41:42

Becoming root with su

Time of First Successful Submission: 2026-03-07 19:39:39

Other users with su

Time of First Successful Submission: 2026-03-07 19:40:15

Cracking passwords

Time of First Successful Submission: 2026-03-07 19:54:41

Using sudo

Time of First Successful Submission: 2026-03-07 19:59:27

Changing File Ownership

Time of First Successful Submission: 2026-03-08 20:14:11

Groups and Files

Time of First Successful Submission: 2026-03-08 20:17:01

Fun With Groups Names

Time of First Successful Submission: 2026-03-08 20:17:59

Changing Permissions

Time of First Successful Submission: 2026-03-08 20:36:24

Executable Files

Time of First Successful Submission: 2026-03-08 20:40:23

Permission Tweaking Practice

Time of First Successful Submission: 2026-03-08 20:48:57

Permissions Setting Practice

Time of First Successful Submission: 2026-03-08 21:05:00

The SUID Bit

Time of First Successful Submission: 2026-03-08 21:07:20

Chaining with Semicolons

Time of First Successful Submission: 2026-03-09 23:26:04

Building on Success

Time of First Successful Submission: 2026-03-09 23:27:27

Handling Failure

Time of First Successful Submission: 2026-03-09 23:28:42

Your First Shell Script

Time of First Successful Submission: 2026-03-09 23:33:57

Redirecting Script Output

Time of First Successful Submission: 2026-03-09 23:36:09

Executable Shell Scripts

Time of First Successful Submission: 2026-03-10 01:07:38

Understanding Shebangs

Time of First Successful Submission: 2026-03-10 01:11:44

Scripting with Arguments

Time of First Successful Submission: 2026-03-10 01:14:46

Scripting with Conditionals

Time of First Successful Submission: 2026-03-10 01:17:03

Scripting with Default Cases

Time of First Successful Submission: 2026-03-10 01:19:11

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-03-10 04:54:35

Reading Shell Scripts

Time of First Successful Submission: 2026-03-10 04:56:17

Launching Screen

Time of First Successful Submission: 2026-03-10 21:15:21

Detaching and Attaching

Time of First Successful Submission: 2026-03-10 21:18:05

Finding Sessions

Time of First Successful Submission: 2026-03-10 21:20:19

Switching Windows

Time of First Successful Submission: 2026-03-10 21:32:27

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-03-10 22:06:00

Switching Windows (tmux)

Time of First Successful Submission: 2026-03-10 22:33:22

The PATH Variable

Time of First Successful Submission: 2026-03-11 15:15:12

Setting PATH

Time of First Successful Submission: 2026-03-11 15:17:13

Finding Commands

Time of First Successful Submission: 2026-03-11 15:18:56

Adding Commands

Time of First Successful Submission: 2026-03-11 23:09:40

Hijacking Commands

Time of First Successful Submission: 2026-03-12 00:02:12

Bashrc Backdoor

Time of First Successful Submission: 2026-03-12 16:22:41

Sniffing Input

Time of First Successful Submission: 2026-03-12 21:46:01

Overshared Directories

Time of First Successful Submission: 2026-03-12 23:52:42

Tricky Linking

Time of First Successful Submission: 2026-03-13 05:49:38

Sniffing Process Arguments

Time of First Successful Submission: 2026-03-13 05:51:33

Snooping on Configurations

Time of First Successful Submission: 2026-03-13 05:55:40

The Fork Bomb

Time of First Successful Submission: 2026-03-16 03:02:33

Disk-Space Doomsday

Time of First Successful Submission: 2026-03-16 04:34:24

rm -rf /

Time of First Successful Submission: 2026-03-16 03:26:44

Life after rm -rf /

Time of First Successful Submission: 2026-03-16 04:01:02

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-03-16 04:27:06


Computing 101

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Your First Register

Time of First Successful Submission: 2026-03-17 21:37:14

Your First Syscall

Time of First Successful Submission: 2026-03-17 21:40:57

Exit Codes

Time of First Successful Submission: 2026-03-17 21:42:47

Building Executables

Time of First Successful Submission: 2026-03-17 21:47:31

Moving Between Registers

Time of First Successful Submission: 2026-03-17 21:56:56

Loading From Memory

Time of First Successful Submission: 2026-03-21 20:59:31

More Loading Practice

Time of First Successful Submission: 2026-03-21 21:01:14

Dereferencing Pointers

Time of First Successful Submission: 2026-03-21 21:07:03

Dereferencing Yourself

Time of First Successful Submission: 2026-03-21 21:09:59

Dereferencing with Offsets

Time of First Successful Submission: 2026-03-21 21:16:02

Stored Addresses

Time of First Successful Submission: 2026-03-21 21:19:53

Double Dereference

Time of First Successful Submission: 2026-03-21 21:23:31

The Stack

Time of First Successful Submission: 2026-03-22 16:15:38

Stack Offsets

Time of First Successful Submission: 2026-03-22 16:17:56

Program Arguments on the Stack

Time of First Successful Submission: 2026-03-22 16:20:29

Popping From the Stack

Time of First Successful Submission: 2026-03-22 16:23:53

Disassembling Programs

Time of First Successful Submission: 2026-03-23 21:03:45

Tracing Syscalls

Time of First Successful Submission: 2026-03-23 21:06:07

Starting GDB

Time of First Successful Submission: 2026-03-23 21:07:01

Quitting GDB

Time of First Successful Submission: 2026-03-23 21:07:42

Starting Programs in GDB

Time of First Successful Submission: 2026-03-23 21:10:09

Disassembling in GDB

Time of First Successful Submission: 2026-03-23 21:11:02

Stepping Through Instructions

Time of First Successful Submission: 2026-03-23 21:12:31

Reading Register Values

Time of First Successful Submission: 2026-03-23 21:13:45

Popping Stack Values

Time of First Successful Submission: 2026-03-23 21:15:08

Examining Memory

Time of First Successful Submission: 2026-03-23 21:18:01

Examining Stack Pointers

Time of First Successful Submission: 2026-03-23 21:21:05

Cooperative Debugging

Time of First Successful Submission: 2026-03-23 21:25:25

Writing Output

Time of First Successful Submission: 2026-03-24 17:52:34

Chaining Syscalls

Time of First Successful Submission: 2026-03-24 18:03:00

Writing Strings

Time of First Successful Submission: 2026-03-24 18:05:36

Reading Data

Time of First Successful Submission: 2026-03-24 19:15:14

Opening Files

Time of First Successful Submission: 2026-03-25 20:08:32

Hardcoding the Filename

Time of First Successful Submission: 2026-03-26 23:30:03

Comparing Values

Time of First Successful Submission: 2026-03-28 22:18:25

Comparing Characters

Time of First Successful Submission: 2026-03-28 22:21:33

Conditional Control Flow

Time of First Successful Submission: 2026-03-28 22:35:32

Comparing Strings

Time of First Successful Submission: 2026-03-28 22:39:31

Reverse the Password

Time of First Successful Submission: 2026-03-28 22:49:45

Conditionals Without Conditionals

Time of First Successful Submission: 2026-03-29 14:36:20

Looping

Time of First Successful Submission: 2026-03-29 14:46:02

Reverse the Calculation

Time of First Successful Submission: 2026-03-29 14:55:46

Reverse the Reverse

Time of First Successful Submission: 2026-03-29 14:57:33

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-03-29 15:19:39

Loops on Data

Time of First Successful Submission: 2026-03-29 15:23:25

set-register

Time of First Successful Submission: 2026-03-31 14:43:46

set-multiple-registers

Time of First Successful Submission: 2026-03-31 14:54:12

add-to-register

Time of First Successful Submission: 2026-03-31 14:58:34

linear-equation-registers

Time of First Successful Submission: 2026-03-31 15:03:17

integer-division

Time of First Successful Submission: 2026-03-31 15:10:40

modulo-operation

Time of First Successful Submission: 2026-03-31 15:14:21

set-upper-byte

Time of First Successful Submission: 2026-03-31 15:17:35

efficient-modulo

Time of First Successful Submission: 2026-03-31 15:37:22

byte-extraction

Time of First Successful Submission: 2026-03-31 15:46:00

bitwise-and

Time of First Successful Submission: 2026-03-31 15:54:53

check-even

Time of First Successful Submission: 2026-04-01 00:53:54

memory-read

Time of First Successful Submission: 2026-04-01 21:06:45

memory-write

Time of First Successful Submission: 2026-04-01 21:19:43

memory-increment

Time of First Successful Submission: 2026-04-01 21:25:27

byte-access

Time of First Successful Submission: 2026-04-01 21:27:34

memory-size-access

Time of First Successful Submission: 2026-04-01 21:30:19

little-endian-write

Time of First Successful Submission: 2026-04-01 21:35:50

memory-sum

Time of First Successful Submission: 2026-04-01 21:43:39

stack-subtraction

Time of First Successful Submission: 2026-04-02 15:20:39

swap-stack-values

Time of First Successful Submission: 2026-04-02 15:24:15

average-stack-values

Time of First Successful Submission: 2026-04-02 15:58:18

absolute-jump

Time of First Successful Submission: 2026-04-02 16:07:24

relative-jump

Time of First Successful Submission: 2026-04-02 16:14:00

jump-trampoline

Time of First Successful Submission: 2026-04-02 16:17:18

conditional-jump

Time of First Successful Submission: 2026-04-03 15:22:56

indirect-jump

Time of First Successful Submission: 2026-04-03 15:56:23

average-loop

Time of First Successful Submission: 2026-04-04 15:53:54

count-non-zero

Time of First Successful Submission: 2026-04-04 16:14:22


GCA CTF

10 / 104 19735 / 43659


Using the Terminal

Time of First Successful Submission: 2026-02-28 22:44:40

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-28 22:47:36

Using the GUI Desktop

Time of First Successful Submission: 2026-02-28 22:50:28

Pasting into the Desktop

Time of First Successful Submission: 2026-02-28 22:51:57

Restarting Challenges

Time of First Successful Submission: 2026-02-28 23:47:32

Challenge Programs

Time of First Successful Submission: 2026-02-28 23:48:56

The Flag File

Time of First Successful Submission: 2026-02-28 23:50:07

Using Privileged Mode

Time of First Successful Submission: 2026-03-01 05:16:46

Persistent Home Directories - One

Time of First Successful Submission: 2026-03-01 18:04:07

Persistent Home Directories - Two

Time of First Successful Submission: 2026-03-01 18:05:12