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Triple Dereference

Time of First Successful Submission: 2025-12-15 09:34:36

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2025-12-13 06:08:25

Command Arguments

Time of First Successful Submission: 2025-12-13 06:09:37

Command History

Time of First Successful Submission: 2025-12-13 06:10:27

The Root Path

Time of First Successful Submission: 2025-12-13 06:16:14

Absolute Paths

Time of First Successful Submission: 2025-12-13 06:18:00

Changing position

Time of First Successful Submission: 2025-12-13 06:20:08

Changing to an Absolute Path

Time of First Successful Submission: 2025-12-13 06:22:35

Relative Paths

Time of First Successful Submission: 2025-12-13 06:25:17

Cat

Time of First Successful Submission: 2025-12-13 06:38:35

Ls

Time of First Successful Submission: 2025-12-13 06:44:28

Ls All

Time of First Successful Submission: 2025-12-13 06:57:37

Find

Time of First Successful Submission: 2025-12-13 07:13:01

Piping Echo

Time of First Successful Submission: 2025-12-13 12:20:32

Piping Stdout

Time of First Successful Submission: 2025-12-13 12:21:32

Piping Stdin

Time of First Successful Submission: 2025-12-13 12:26:39

Start Here

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Using the Terminal

Time of First Successful Submission: 2025-12-12 19:25:58

Using the VSCode Workspace

Time of First Successful Submission: 2025-12-12 19:32:48

Using the GUI Desktop

Time of First Successful Submission: 2025-12-12 19:31:07

Pasting into the Desktop

Time of First Successful Submission: 2025-12-12 19:40:53

Restarting Challenges

Time of First Successful Submission: 2025-12-13 05:34:04

Challenge Programs

Time of First Successful Submission: 2025-12-13 05:38:47

The Flag File

Time of First Successful Submission: 2025-12-13 05:40:18

Using Privileged Mode

Time of First Successful Submission: 2025-12-13 05:43:11

Persistent Home Directories - One

Time of First Successful Submission: 2025-12-13 05:45:57

Persistent Home Directories - Two

Time of First Successful Submission: 2025-12-13 05:48:29

Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2025-12-13 06:08:25

Intro to Arguments

Time of First Successful Submission: 2025-12-13 06:09:37

Command History

Time of First Successful Submission: 2025-12-13 06:10:27

The Root

Time of First Successful Submission: 2025-12-13 06:16:14

Program and absolute paths

Time of First Successful Submission: 2025-12-13 06:18:00

Position thy self

Time of First Successful Submission: 2025-12-13 06:20:08

Position elsewhere

Time of First Successful Submission: 2025-12-13 06:22:35

implicit relative paths, from /

Time of First Successful Submission: 2025-12-13 06:25:17

explicit relative paths, from /

Time of First Successful Submission: 2025-12-13 06:26:48

implicit relative path

Time of First Successful Submission: 2025-12-13 06:28:19

home sweet home

Time of First Successful Submission: 2025-12-13 06:32:06

cat: not the pet, but the command!

Time of First Successful Submission: 2025-12-13 06:38:35

catting absolute paths

Time of First Successful Submission: 2025-12-13 06:40:01

more catting practice

Time of First Successful Submission: 2025-12-13 06:40:53

grepping for a needle in a haystack

Time of First Successful Submission: 2025-12-13 06:42:02

comparing files

Time of First Successful Submission: 2025-12-13 06:43:05

listing files

Time of First Successful Submission: 2025-12-13 06:44:28

touching files

Time of First Successful Submission: 2025-12-13 06:45:30

removing files

Time of First Successful Submission: 2025-12-13 06:46:30

moving files

Time of First Successful Submission: 2025-12-13 06:47:53

copying files

Time of First Successful Submission: 2025-12-13 06:56:14

hidden files

Time of First Successful Submission: 2025-12-13 06:57:37

An Epic Filesystem Quest

Time of First Successful Submission: 2025-12-13 07:05:52

making directories

Time of First Successful Submission: 2025-12-13 07:06:52

finding files

Time of First Successful Submission: 2025-12-13 07:13:01

linking files

Time of First Successful Submission: 2025-12-13 08:43:29

Learning From Documentation

Time of First Successful Submission: 2025-12-13 08:51:05

Learning Complex Usage

Time of First Successful Submission: 2025-12-13 08:55:39

Reading Manuals

Time of First Successful Submission: 2025-12-13 08:58:20

Searching Manuals

Time of First Successful Submission: 2025-12-13 08:59:51

Searching For Manuals

Time of First Successful Submission: 2025-12-13 10:01:17

Helpful Programs

Time of First Successful Submission: 2025-12-13 10:02:47

Help for Builtins

Time of First Successful Submission: 2025-12-13 10:04:02

Matching with *

Time of First Successful Submission: 2025-12-13 10:06:13

Matching with ?

Time of First Successful Submission: 2025-12-13 10:07:04

Matching with []

Time of First Successful Submission: 2025-12-13 10:08:40

Matching paths with []

Time of First Successful Submission: 2025-12-13 10:09:39

Multiple globs

Time of First Successful Submission: 2025-12-13 10:11:17

Mixing globs

Time of First Successful Submission: 2025-12-13 10:14:33

Exclusionary globbing

Time of First Successful Submission: 2025-12-13 10:15:37

Tab completion

Time of First Successful Submission: 2025-12-13 10:16:59

Multiple options for tab completion

Time of First Successful Submission: 2025-12-13 10:18:38

Tab completion on commands

Time of First Successful Submission: 2025-12-13 10:19:55

Redirecting output

Time of First Successful Submission: 2025-12-13 12:20:32

Redirecting more output

Time of First Successful Submission: 2025-12-13 12:21:32

Appending output

Time of First Successful Submission: 2025-12-13 12:22:45

Redirecting errors

Time of First Successful Submission: 2025-12-13 12:24:48

Redirecting input

Time of First Successful Submission: 2025-12-13 12:26:39

Grepping stored results

Time of First Successful Submission: 2025-12-13 12:28:00

Grepping live output

Time of First Successful Submission: 2025-12-13 12:29:04

Grepping errors

Time of First Successful Submission: 2025-12-13 12:30:39

Filtering with grep -v

Time of First Successful Submission: 2025-12-13 12:32:04

Filtering with sed

Time of First Successful Submission: 2025-12-13 12:33:05

Duplicating piped data with tee

Time of First Successful Submission: 2025-12-13 12:57:52

Process substitution for input

Time of First Successful Submission: 2025-12-13 13:01:58

Writing to multiple programs

Time of First Successful Submission: 2025-12-13 13:38:40

Split-piping stderr and stdout

Time of First Successful Submission: 2025-12-13 14:36:44

Named pipes

Time of First Successful Submission: 2025-12-13 14:43:04

Printing Variables

Time of First Successful Submission: 2025-12-13 14:44:38

Setting Variables

Time of First Successful Submission: 2025-12-13 14:45:17

Multi-word Variables

Time of First Successful Submission: 2025-12-13 14:46:04

Exporting Variables

Time of First Successful Submission: 2025-12-13 14:50:48

Printing Exported Variables

Time of First Successful Submission: 2025-12-13 14:51:22

Storing Command Output

Time of First Successful Submission: 2025-12-13 14:52:36

Reading Input

Time of First Successful Submission: 2025-12-13 14:54:49

Reading Files

Time of First Successful Submission: 2025-12-13 14:56:03

Translating characters

Time of First Successful Submission: 2025-12-13 15:00:42

Deleting characters

Time of First Successful Submission: 2025-12-13 15:04:48

Deleting newlines

Time of First Successful Submission: 2025-12-13 15:05:33

Extracting the first lines with head

Time of First Successful Submission: 2025-12-13 15:06:55

Extracting specific sections of text

Time of First Successful Submission: 2025-12-13 15:10:58

Sorting data

Time of First Successful Submission: 2025-12-13 15:11:53

Listing Processes

Time of First Successful Submission: 2025-12-13 15:49:17

Killing Processes

Time of First Successful Submission: 2025-12-13 15:50:51

Interrupting Processes

Time of First Successful Submission: 2025-12-13 15:51:51

Killing Misbehaving Processes

Time of First Successful Submission: 2025-12-13 16:01:16

Suspending Processes

Time of First Successful Submission: 2025-12-13 16:02:22

Resuming Processes

Time of First Successful Submission: 2025-12-13 16:03:31

Backgrounding Processes

Time of First Successful Submission: 2025-12-13 16:05:35

Foregrounding Processes

Time of First Successful Submission: 2025-12-13 16:06:30

Starting Backgrounded Processes

Time of First Successful Submission: 2025-12-13 16:07:22

Process Exit Codes

Time of First Successful Submission: 2025-12-13 16:09:47

Becoming root with su

Time of First Successful Submission: 2025-12-13 16:44:37

Other users with su

Time of First Successful Submission: 2025-12-13 16:45:31

Cracking passwords

Time of First Successful Submission: 2025-12-13 16:53:31

Using sudo

Time of First Successful Submission: 2025-12-13 17:11:39

Changing File Ownership

Time of First Successful Submission: 2025-12-13 17:32:01

Groups and Files

Time of First Successful Submission: 2025-12-13 17:34:33

Fun With Groups Names

Time of First Successful Submission: 2025-12-13 17:35:35

Changing Permissions

Time of First Successful Submission: 2025-12-13 17:38:44

Executable Files

Time of First Successful Submission: 2025-12-13 17:40:21

Permission Tweaking Practice

Time of First Successful Submission: 2025-12-13 17:44:51

Permissions Setting Practice

Time of First Successful Submission: 2025-12-13 17:54:06

The SUID Bit

Time of First Successful Submission: 2025-12-13 17:57:00

Chaining with Semicolons

Time of First Successful Submission: 2025-12-13 18:07:15

Building on Success

Time of First Successful Submission: 2025-12-13 18:07:55

Handling Failure

Time of First Successful Submission: 2025-12-13 18:08:45

Your First Shell Script

Time of First Successful Submission: 2025-12-13 18:21:24

Redirecting Script Output

Time of First Successful Submission: 2025-12-13 19:52:05

Executable Shell Scripts

Time of First Successful Submission: 2025-12-13 19:53:19

Understanding Shebangs

Time of First Successful Submission: 2025-12-13 19:57:09

Scripting with Arguments

Time of First Successful Submission: 2025-12-13 19:58:24

Scripting with Conditionals

Time of First Successful Submission: 2025-12-13 20:02:55

Scripting with Default Cases

Time of First Successful Submission: 2025-12-13 20:05:45

Scripting with Multiple Conditions

Time of First Successful Submission: 2025-12-13 20:08:51

Reading Shell Scripts

Time of First Successful Submission: 2025-12-13 20:12:49

Launching Screen

Time of First Successful Submission: 2025-12-13 20:15:35

Detaching and Attaching

Time of First Successful Submission: 2025-12-13 20:17:30

Finding Sessions

Time of First Successful Submission: 2025-12-13 20:19:42

Switching Windows

Time of First Successful Submission: 2025-12-13 20:25:21

Detaching and Attaching (tmux)

Time of First Successful Submission: 2025-12-13 20:26:34

Switching Windows (tmux)

Time of First Successful Submission: 2025-12-13 20:27:40

The PATH Variable

Time of First Successful Submission: 2025-12-13 20:33:27

Setting PATH

Time of First Successful Submission: 2025-12-13 20:35:13

Finding Commands

Time of First Successful Submission: 2025-12-13 20:36:24

Adding Commands

Time of First Successful Submission: 2025-12-14 05:56:03

Hijacking Commands

Time of First Successful Submission: 2025-12-14 06:06:56

Bashrc Backdoor

Time of First Successful Submission: 2025-12-14 07:36:51

Sniffing Input

Time of First Successful Submission: 2025-12-14 07:51:07

Overshared Directories

Time of First Successful Submission: 2025-12-14 08:02:06

Tricky Linking

Time of First Successful Submission: 2025-12-14 08:06:48

Sniffing Process Arguments

Time of First Successful Submission: 2025-12-14 10:56:11

Snooping on Configurations

Time of First Successful Submission: 2025-12-14 10:58:16

The Fork Bomb

Time of First Successful Submission: 2025-12-14 11:44:39

Disk-Space Doomsday

Time of First Successful Submission: 2025-12-14 11:59:47

rm -rf /

Time of First Successful Submission: 2025-12-14 12:13:31

Life after rm -rf /

Time of First Successful Submission: 2025-12-14 13:17:14

Finding meaning after rm -rf /

Time of First Successful Submission: 2025-12-14 13:20:23

Computing 101

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Your First Register

Time of First Successful Submission: 2025-12-14 19:05:25

Your First Syscall

Time of First Successful Submission: 2025-12-14 19:08:52

Exit Codes

Time of First Successful Submission: 2025-12-14 19:10:09

Building Executables

Time of First Successful Submission: 2025-12-14 19:17:48

Moving Between Registers

Time of First Successful Submission: 2025-12-14 19:20:45

Loading From Memory

Time of First Successful Submission: 2025-12-15 09:08:46

More Loading Practice

Time of First Successful Submission: 2025-12-15 09:09:48

Dereferencing Pointers

Time of First Successful Submission: 2025-12-15 09:15:15

Dereferencing Yourself

Time of First Successful Submission: 2025-12-15 09:17:55

Dereferencing with Offsets

Time of First Successful Submission: 2025-12-15 09:25:15

Stored Addresses

Time of First Successful Submission: 2025-12-15 09:27:50

Double Dereference

Time of First Successful Submission: 2025-12-15 09:32:43

Tracing Syscalls

Time of First Successful Submission: 2025-12-14 19:34:34

Starting GDB

Time of First Successful Submission: 2025-12-14 19:35:33

Starting Programs in GDB

Time of First Successful Submission: 2025-12-14 19:36:30

Writing Output

Time of First Successful Submission: 2025-12-15 10:07:31

Chaining Syscalls

Time of First Successful Submission: 2025-12-15 10:09:20

Writing Strings

Time of First Successful Submission: 2025-12-15 10:10:14

Reading Data

Time of First Successful Submission: 2025-12-15 10:13:53

set-register

Time of First Successful Submission: 2025-12-16 05:41:38

set-multiple-registers

Time of First Successful Submission: 2025-12-16 05:47:08

add-to-register

Time of First Successful Submission: 2025-12-16 05:51:39

linear-equation-registers

Time of First Successful Submission: 2025-12-16 06:08:01

integer-division

Time of First Successful Submission: 2025-12-16 06:12:56

modulo-operation

Time of First Successful Submission: 2025-12-16 06:20:35

set-upper-byte

Time of First Successful Submission: 2025-12-16 06:45:33

efficient-modulo

Time of First Successful Submission: 2025-12-16 06:59:25

byte-extraction

Time of First Successful Submission: 2025-12-16 07:09:37

bitwise-and

Time of First Successful Submission: 2025-12-16 07:11:49

check-even

Time of First Successful Submission: 2025-12-16 07:22:43

memory-read

Time of First Successful Submission: 2025-12-16 07:26:11

memory-write

Time of First Successful Submission: 2025-12-16 07:27:41

memory-increment

Time of First Successful Submission: 2025-12-16 07:32:09

byte-access

Time of First Successful Submission: 2025-12-16 07:34:45

memory-size-access

Time of First Successful Submission: 2025-12-16 17:32:10

little-endian-write

Time of First Successful Submission: 2025-12-16 17:40:04

memory-sum

Time of First Successful Submission: 2025-12-16 17:43:40

stack-subtraction

Time of First Successful Submission: 2025-12-16 17:49:30

swap-stack-values

Time of First Successful Submission: 2025-12-16 17:52:34

average-stack-values

Time of First Successful Submission: 2025-12-17 07:28:17

absolute-jump

Time of First Successful Submission: 2025-12-17 07:33:22

relative-jump

Time of First Successful Submission: 2025-12-17 07:42:01

jump-trampoline

Time of First Successful Submission: 2025-12-17 07:44:40

conditional-jump

Time of First Successful Submission: 2025-12-17 08:24:42

indirect-jump

Time of First Successful Submission: 2025-12-17 08:55:22

average-loop

Time of First Successful Submission: 2025-12-17 09:09:14

count-non-zero

Time of First Successful Submission: 2025-12-17 10:00:27

string-lower

Time of First Successful Submission: 2025-12-17 11:06:37

most-common-byte

Time of First Successful Submission: 2025-12-17 13:22:05

Debugging Programs

Time of First Successful Submission: 2025-12-17 13:50:31

Inspecting Registers

Time of First Successful Submission: 2025-12-17 13:53:48

Examining Memory

Time of First Successful Submission: 2025-12-19 09:17:40

Playing With Programs

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What's the password?

Time of First Successful Submission: 2025-12-19 16:58:06

... and again!

Time of First Successful Submission: 2025-12-19 16:58:45

Newline Troubles

Time of First Successful Submission: 2025-12-19 17:05:00

cat

Time of First Successful Submission: 2025-12-17 14:00:01

more

Time of First Successful Submission: 2025-12-17 14:00:28

less

Time of First Successful Submission: 2025-12-17 14:00:54

tail

Time of First Successful Submission: 2025-12-17 14:01:33

head

Time of First Successful Submission: 2025-12-17 14:02:07

sort

Time of First Successful Submission: 2025-12-17 14:02:33

vim

Time of First Successful Submission: 2025-12-17 14:03:48

emacs

Time of First Successful Submission: 2025-12-17 14:04:13

nano

Time of First Successful Submission: 2025-12-17 14:04:37

rev

Time of First Successful Submission: 2025-12-17 14:03:24

split

Time of First Successful Submission: 2025-12-17 16:39:34

gzip

Time of First Successful Submission: 2025-12-17 16:41:06

bzip2

Time of First Successful Submission: 2025-12-17 16:42:07

awk

Time of First Successful Submission: 2025-12-17 16:56:17

chown

Time of First Successful Submission: 2025-12-17 16:57:01

chmod

Time of First Successful Submission: 2025-12-17 16:57:34

cp

Time of First Successful Submission: 2025-12-17 19:14:23

SQL Queries

Time of First Successful Submission: 2025-12-17 17:03:49

Filtering SQL

Time of First Successful Submission: 2025-12-17 17:45:29

Choosing Columns

Time of First Successful Submission: 2025-12-17 17:53:02

Exclusionary Filtering

Time of First Successful Submission: 2025-12-17 17:58:07

Filtering Strings

Time of First Successful Submission: 2025-12-17 18:02:36

Filtering on Expressions

Time of First Successful Submission: 2025-12-17 18:19:47

SELECTing Expressions

Time of First Successful Submission: 2025-12-17 18:38:39

Composite Conditions

Time of First Successful Submission: 2025-12-17 18:58:40

Reaching Your LIMITs

Time of First Successful Submission: 2025-12-17 19:01:33

Querying Metadata

Time of First Successful Submission: 2025-12-17 19:05:04

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2025-12-12 19:25:58

Using the VSCode Workspace

Time of First Successful Submission: 2025-12-12 19:32:48

Using the GUI Desktop

Time of First Successful Submission: 2025-12-12 19:31:07

Pasting into the Desktop

Time of First Successful Submission: 2025-12-12 19:40:53

Restarting Challenges

Time of First Successful Submission: 2025-12-13 05:34:04

Getting Help

Time of First Successful Submission: 2025-12-13 05:56:05

Challenge Programs

Time of First Successful Submission: 2025-12-13 05:38:47

The Flag File

Time of First Successful Submission: 2025-12-13 05:40:18

Using Privileged Mode

Time of First Successful Submission: 2025-12-13 05:43:11

Persistent Home Directories - One

Time of First Successful Submission: 2025-12-13 05:45:57

Persistent Home Directories - Two

Time of First Successful Submission: 2025-12-13 05:48:29