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1 / 202 19134 / 22806


Triple Dereference

Time of First Successful Submission: 2025-07-09 17:51:10


Intro to Programming Languages

15 / 234 1752 / 32303


Commands

Time of First Successful Submission: 2025-06-23 08:56:08

Command Arguments

Time of First Successful Submission: 2025-06-23 08:59:06

Command History

Time of First Successful Submission: 2025-06-23 09:01:47

The Root Path

Time of First Successful Submission: 2025-06-23 11:17:33

Absolute Paths

Time of First Successful Submission: 2025-06-23 11:22:45

Changing position

Time of First Successful Submission: 2025-06-23 11:26:53

Changing to an Absolute Path

Time of First Successful Submission: 2025-06-23 11:28:34

Relative Paths

Time of First Successful Submission: 2025-06-23 11:35:16

Cat

Time of First Successful Submission: 2025-06-24 04:18:34

Ls

Time of First Successful Submission: 2025-06-24 04:27:15

Ls All

Time of First Successful Submission: 2025-06-24 04:42:47

Find

Time of First Successful Submission: 2025-06-25 17:48:42

Piping Echo

Time of First Successful Submission: 2025-06-30 05:33:28

Piping Stdout

Time of First Successful Submission: 2025-06-30 05:35:50

Piping Stdin

Time of First Successful Submission: 2025-06-30 05:43:13


Start Here

10 / 12 17181 / 43711


Using the VSCode Workspace

Time of First Successful Submission: 2025-06-21 17:25:43

Using the GUI Desktop

Time of First Successful Submission: 2025-06-21 17:28:32

Pasting into the Desktop

Time of First Successful Submission: 2025-06-21 17:31:48

Restarting Challenges

Time of First Successful Submission: 2025-06-21 17:36:42

Challenge Programs

Time of First Successful Submission: 2025-06-21 17:49:20

The Flag File

Time of First Successful Submission: 2025-06-21 17:52:32

Using Privileged Mode

Time of First Successful Submission: 2025-06-21 18:01:34

Persistent Home Directories - One

Time of First Successful Submission: 2025-06-21 18:11:10

Persistent Home Directories - Two

Time of First Successful Submission: 2025-06-21 18:12:50


Linux Luminarium

107 / 128 5822 / 32719


Intro to Commands

Time of First Successful Submission: 2025-06-23 08:56:08

Intro to Arguments

Time of First Successful Submission: 2025-06-23 08:59:06

Command History

Time of First Successful Submission: 2025-06-23 09:01:47

The Root

Time of First Successful Submission: 2025-06-23 11:17:33

Program and absolute paths

Time of First Successful Submission: 2025-06-23 11:22:45

Position thy self

Time of First Successful Submission: 2025-06-23 11:26:53

Position elsewhere

Time of First Successful Submission: 2025-06-23 11:28:34

implicit relative paths, from /

Time of First Successful Submission: 2025-06-23 11:35:16

explicit relative paths, from /

Time of First Successful Submission: 2025-06-23 11:38:32

implicit relative path

Time of First Successful Submission: 2025-06-23 11:40:24

home sweet home

Time of First Successful Submission: 2025-06-23 11:52:49

cat: not the pet, but the command!

Time of First Successful Submission: 2025-06-24 04:18:34

catting absolute paths

Time of First Successful Submission: 2025-06-24 04:21:06

more catting practice

Time of First Successful Submission: 2025-06-24 04:23:06

grepping for a needle in a haystack

Time of First Successful Submission: 2025-06-24 04:24:50

listing files

Time of First Successful Submission: 2025-06-24 04:27:15

touching files

Time of First Successful Submission: 2025-06-24 04:29:05

removing files

Time of First Successful Submission: 2025-06-24 04:31:16

moving files

Time of First Successful Submission: 2025-06-24 04:32:43

hidden files

Time of First Successful Submission: 2025-06-24 04:42:47

An Epic Filesystem Quest

Time of First Successful Submission: 2025-06-24 05:00:22

making directories

Time of First Successful Submission: 2025-06-24 05:02:42

finding files

Time of First Successful Submission: 2025-06-25 17:48:42

linking files

Time of First Successful Submission: 2025-06-25 17:59:04

Learning From Documentation

Time of First Successful Submission: 2025-06-25 18:03:02

Learning Complex Usage

Time of First Successful Submission: 2025-06-25 18:06:13

Reading Manuals

Time of First Successful Submission: 2025-06-25 18:08:55

Searching Manuals

Time of First Successful Submission: 2025-06-25 18:13:03

Searching For Manuals

Time of First Successful Submission: 2025-06-25 18:19:10

Helpful Programs

Time of First Successful Submission: 2025-06-25 18:21:54

Help for Builtins

Time of First Successful Submission: 2025-06-25 18:24:32

Matching with *

Time of First Successful Submission: 2025-06-25 18:27:16

Matching with ?

Time of First Successful Submission: 2025-06-25 18:28:36

Matching with []

Time of First Successful Submission: 2025-06-29 15:11:25

Matching paths with []

Time of First Successful Submission: 2025-06-29 15:15:42

Multiple globs

Time of First Successful Submission: 2025-06-29 15:17:40

Mixing globs

Time of First Successful Submission: 2025-06-29 15:28:46

Exclusionary globbing

Time of First Successful Submission: 2025-06-29 15:31:49

Tab completion

Time of First Successful Submission: 2025-06-29 16:38:20

Multiple options for tab completion

Time of First Successful Submission: 2025-06-30 05:28:34

Tab completion on commands

Time of First Successful Submission: 2025-06-30 05:30:00

Redirecting output

Time of First Successful Submission: 2025-06-30 05:33:28

Redirecting more output

Time of First Successful Submission: 2025-06-30 05:35:50

Appending output

Time of First Successful Submission: 2025-06-30 05:38:19

Redirecting errors

Time of First Successful Submission: 2025-06-30 05:41:18

Redirecting input

Time of First Successful Submission: 2025-06-30 05:43:13

Grepping stored results

Time of First Successful Submission: 2025-06-30 05:46:41

Grepping live output

Time of First Successful Submission: 2025-06-30 05:48:05

Grepping errors

Time of First Successful Submission: 2025-06-30 05:50:06

Filtering with grep -v

Time of First Successful Submission: 2025-06-30 05:51:30

Duplicating piped data with tee

Time of First Successful Submission: 2025-06-30 05:58:31

Writing to multiple programs

Time of First Successful Submission: 2025-06-30 17:05:59

Split-piping stderr and stdout

Time of First Successful Submission: 2025-07-03 17:22:32

Printing Variables

Time of First Successful Submission: 2025-06-30 18:14:43

Setting Variables

Time of First Successful Submission: 2025-06-30 18:16:41

Multi-word Variables

Time of First Successful Submission: 2025-06-30 18:17:39

Exporting Variables

Time of First Successful Submission: 2025-06-30 18:20:03

Printing Exported Variables

Time of First Successful Submission: 2025-06-30 18:21:32

Storing Command Output

Time of First Successful Submission: 2025-06-30 18:23:18

Reading Input

Time of First Successful Submission: 2025-07-03 17:24:43

Reading Files

Time of First Successful Submission: 2025-07-03 17:27:06

Translating characters

Time of First Successful Submission: 2025-07-01 15:27:48

Deleting characters

Time of First Successful Submission: 2025-07-01 15:29:41

Deleting newlines

Time of First Successful Submission: 2025-07-01 15:32:32

Extracting the first lines with head

Time of First Successful Submission: 2025-07-01 15:37:28

Extracting specific sections of text

Time of First Successful Submission: 2025-07-01 15:42:08

Listing Processes

Time of First Successful Submission: 2025-07-02 10:11:46

Killing Processes

Time of First Successful Submission: 2025-07-02 10:15:05

Interrupting Processes

Time of First Successful Submission: 2025-07-02 10:16:23

Suspending Processes

Time of First Successful Submission: 2025-07-02 10:18:12

Resuming Processes

Time of First Successful Submission: 2025-07-02 10:29:24

Backgrounding Processes

Time of First Successful Submission: 2025-07-02 10:32:41

Foregrounding Processes

Time of First Successful Submission: 2025-07-02 10:33:53

Starting Backgrounded Processes

Time of First Successful Submission: 2025-07-02 10:34:57

Process Exit Codes

Time of First Successful Submission: 2025-07-02 10:37:12

Becoming root with su

Time of First Successful Submission: 2025-07-03 05:53:10

Other users with su

Time of First Successful Submission: 2025-07-03 05:54:34

Cracking passwords

Time of First Successful Submission: 2025-07-03 05:59:19

Using sudo

Time of First Successful Submission: 2025-07-03 06:02:33

Changing File Ownership

Time of First Successful Submission: 2025-07-02 11:55:58

Groups and Files

Time of First Successful Submission: 2025-07-02 12:06:52

Fun With Groups Names

Time of First Successful Submission: 2025-07-02 12:08:17

Changing Permissions

Time of First Successful Submission: 2025-07-02 12:11:34

Executable Files

Time of First Successful Submission: 2025-07-02 12:14:21

Permission Tweaking Practice

Time of First Successful Submission: 2025-07-02 12:22:23

Permissions Setting Practice

Time of First Successful Submission: 2025-07-02 12:28:42

The SUID Bit

Time of First Successful Submission: 2025-07-02 12:33:21

Chaining with Semicolons

Time of First Successful Submission: 2025-07-03 06:04:53

Your First Shell Script

Time of First Successful Submission: 2025-07-03 06:08:46

Redirecting Script Output

Time of First Successful Submission: 2025-07-03 06:10:59

Executable Shell Scripts

Time of First Successful Submission: 2025-07-04 18:25:15

The PATH Variable

Time of First Successful Submission: 2025-07-03 09:33:57

Setting PATH

Time of First Successful Submission: 2025-07-03 09:35:54

Finding Commands

Time of First Successful Submission: 2025-07-03 09:37:57

Adding Commands

Time of First Successful Submission: 2025-07-04 07:21:04

Hijacking Commands

Time of First Successful Submission: 2025-07-04 07:23:24

Bashrc Backdoor

Time of First Successful Submission: 2025-07-03 17:14:51

Sniffing Input

Time of First Successful Submission: 2025-07-04 18:08:31

Overshared Directories

Time of First Successful Submission: 2025-07-04 18:00:02

Tricky Linking

Time of First Successful Submission: 2025-07-05 12:24:16

Sniffing Process Arguments

Time of First Successful Submission: 2025-07-05 12:46:53

Snooping on Configurations

Time of First Successful Submission: 2025-07-05 12:49:57

The Fork Bomb

Time of First Successful Submission: 2025-07-06 09:07:55

Disk-Space Doomsday

Time of First Successful Submission: 2025-07-06 09:10:48

rm -rf /

Time of First Successful Submission: 2025-07-06 09:13:58

Life after rm -rf /

Time of First Successful Submission: 2025-07-06 09:20:48

Finding meaning after rm -rf /

Time of First Successful Submission: 2025-07-06 09:24:22


Computing 101

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Your First Register

Time of First Successful Submission: 2025-07-08 16:53:35

Your First Syscall

Time of First Successful Submission: 2025-07-08 16:58:02

Exit Codes

Time of First Successful Submission: 2025-07-08 17:54:43

Building Executables

Time of First Successful Submission: 2025-07-09 16:25:01

Moving Between Registers

Time of First Successful Submission: 2025-07-09 16:35:58

Loading From Memory

Time of First Successful Submission: 2025-07-09 17:33:40

More Loading Practice

Time of First Successful Submission: 2025-07-09 17:35:06

Dereferencing Pointers

Time of First Successful Submission: 2025-07-09 17:39:22

Dereferencing Yourself

Time of First Successful Submission: 2025-07-09 17:41:11

Dereferencing with Offsets

Time of First Successful Submission: 2025-07-09 17:42:54

Stored Addresses

Time of First Successful Submission: 2025-07-09 17:45:38

Double Dereference

Time of First Successful Submission: 2025-07-09 17:48:03

Tracing Syscalls

Time of First Successful Submission: 2025-07-09 16:41:46

Starting GDB

Time of First Successful Submission: 2025-07-09 16:44:57

Starting Programs in GDB

Time of First Successful Submission: 2025-07-09 16:47:04

Writing Output

Time of First Successful Submission: 2025-07-10 12:24:45

Chaining Syscalls

Time of First Successful Submission: 2025-07-10 12:27:36

Writing Strings

Time of First Successful Submission: 2025-07-10 12:29:07

Reading Data

Time of First Successful Submission: 2025-07-10 12:32:24

set-register

Time of First Successful Submission: 2025-07-10 12:37:12

set-multiple-registers

Time of First Successful Submission: 2025-07-11 05:59:46

add-to-register

Time of First Successful Submission: 2025-07-10 14:09:06

linear-equation-registers

Time of First Successful Submission: 2025-07-11 05:57:21

integer-division

Time of First Successful Submission: 2025-07-11 06:41:55

modulo-operation

Time of First Successful Submission: 2025-07-11 06:43:56

set-upper-byte

Time of First Successful Submission: 2025-07-11 06:48:53

efficient-modulo

Time of First Successful Submission: 2025-07-11 06:58:23

byte-extraction

Time of First Successful Submission: 2025-07-11 09:09:17

bitwise-and

Time of First Successful Submission: 2025-07-11 09:16:37

check-even

Time of First Successful Submission: 2025-07-11 09:24:13

memory-read

Time of First Successful Submission: 2025-07-11 09:26:48

memory-write

Time of First Successful Submission: 2025-07-11 09:32:39

memory-increment

Time of First Successful Submission: 2025-07-12 16:56:58

byte-access

Time of First Successful Submission: 2025-07-11 09:46:22

memory-size-access

Time of First Successful Submission: 2025-07-11 09:49:45

little-endian-write

Time of First Successful Submission: 2025-07-11 09:53:38

memory-sum

Time of First Successful Submission: 2025-07-11 16:23:23

stack-subtraction

Time of First Successful Submission: 2025-07-11 16:28:29

swap-stack-values

Time of First Successful Submission: 2025-07-11 16:30:54

average-stack-values

Time of First Successful Submission: 2025-07-11 16:38:39

absolute-jump

Time of First Successful Submission: 2025-07-11 16:41:56

relative-jump

Time of First Successful Submission: 2025-07-12 11:40:46

jump-trampoline

Time of First Successful Submission: 2025-07-12 15:45:28

conditional-jump

Time of First Successful Submission: 2025-07-12 16:04:48

indirect-jump

Time of First Successful Submission: 2025-07-13 09:59:32

Exit

Time of First Successful Submission: 2025-07-13 17:48:41

Debugging Programs

Time of First Successful Submission: 2025-07-12 17:14:34

Inspecting Registers

Time of First Successful Submission: 2025-07-12 17:18:03

Examining Memory

Time of First Successful Submission: 2025-07-13 17:31:17


Playing With Programs

11 / 116 17476 / 23459


What's the password?

Time of First Successful Submission: 2025-07-14 09:14:17

... and again!

Time of First Successful Submission: 2025-07-14 09:15:23

Newline Troubles

Time of First Successful Submission: 2025-07-14 09:18:58

Reasoning about files

Time of First Successful Submission: 2025-07-14 09:36:00

Specifying Filenames

Time of First Successful Submission: 2025-07-14 09:39:16

Binary and Hex Encoding

Time of First Successful Submission: 2025-07-14 09:47:22

More Hex

Time of First Successful Submission: 2025-07-14 17:03:27

Decoding Hex

Time of First Successful Submission: 2025-07-14 17:07:08

Decoding Practice

Time of First Successful Submission: 2025-07-14 17:28:09

Encoding Practice

Time of First Successful Submission: 2025-07-14 17:34:29

SQL Queries

Time of First Successful Submission: 2025-07-14 17:12:10


GCA CTF

10 / 104 17313 / 43989


Using the VSCode Workspace

Time of First Successful Submission: 2025-06-21 17:25:43

Using the GUI Desktop

Time of First Successful Submission: 2025-06-21 17:28:32

Pasting into the Desktop

Time of First Successful Submission: 2025-06-21 17:31:48

Restarting Challenges

Time of First Successful Submission: 2025-06-21 17:36:42

Getting Help

Time of First Successful Submission: 2025-06-21 17:42:07

Challenge Programs

Time of First Successful Submission: 2025-06-21 17:49:20

The Flag File

Time of First Successful Submission: 2025-06-21 17:52:32

Using Privileged Mode

Time of First Successful Submission: 2025-06-21 18:01:34

Persistent Home Directories - One

Time of First Successful Submission: 2025-06-21 18:11:10

Persistent Home Directories - Two

Time of First Successful Submission: 2025-06-21 18:12:50