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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-04-01 08:45:54

Command Arguments

Time of First Successful Submission: 2026-04-01 08:46:57

Command History

Time of First Successful Submission: 2026-04-01 08:47:53

The Root Path

Time of First Successful Submission: 2026-04-01 08:54:06

Absolute Paths

Time of First Successful Submission: 2026-04-01 08:56:03

Changing position

Time of First Successful Submission: 2026-04-01 09:01:26

Changing to an Absolute Path

Time of First Successful Submission: 2026-04-01 09:02:52

Relative Paths

Time of First Successful Submission: 2026-04-01 09:07:31

Cat

Time of First Successful Submission: 2026-04-01 09:23:55

Ls

Time of First Successful Submission: 2026-04-01 09:32:03

Ls All

Time of First Successful Submission: 2026-04-01 09:44:24

Find

Time of First Successful Submission: 2026-04-03 09:15:12

Piping Echo

Time of First Successful Submission: 2026-04-02 09:32:16

Piping Stdout

Time of First Successful Submission: 2026-04-02 09:33:37

Piping Stdin

Time of First Successful Submission: 2026-04-02 09:49:09


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-03-31 21:30:14

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-03 09:20:35

Using the GUI Desktop

Time of First Successful Submission: 2026-04-03 09:22:39

Pasting into the Desktop

Time of First Successful Submission: 2026-04-03 09:23:53

Restarting Challenges

Time of First Successful Submission: 2026-04-03 09:25:23

Challenge Programs

Time of First Successful Submission: 2026-04-02 21:02:34

The Flag File

Time of First Successful Submission: 2026-04-02 21:03:23

Using Privileged Mode

Time of First Successful Submission: 2026-04-02 21:07:12

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-02 21:09:54

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-02 21:12:46


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-04-01 08:45:54

Intro to Arguments

Time of First Successful Submission: 2026-04-01 08:46:57

Command History

Time of First Successful Submission: 2026-04-01 08:47:53

The Root

Time of First Successful Submission: 2026-04-01 08:54:06

Program and absolute paths

Time of First Successful Submission: 2026-04-01 08:56:03

Position thy self

Time of First Successful Submission: 2026-04-01 09:01:26

Position elsewhere

Time of First Successful Submission: 2026-04-01 09:02:52

implicit relative paths, from /

Time of First Successful Submission: 2026-04-01 09:07:31

explicit relative paths, from /

Time of First Successful Submission: 2026-04-01 09:11:31

implicit relative path

Time of First Successful Submission: 2026-04-01 09:13:55

home sweet home

Time of First Successful Submission: 2026-04-01 09:21:14

cat: not the pet, but the command!

Time of First Successful Submission: 2026-04-01 09:23:55

catting absolute paths

Time of First Successful Submission: 2026-04-01 09:25:10

more catting practice

Time of First Successful Submission: 2026-04-01 09:25:58

grepping for a needle in a haystack

Time of First Successful Submission: 2026-04-01 09:27:20

comparing files

Time of First Successful Submission: 2026-04-01 09:29:45

listing files

Time of First Successful Submission: 2026-04-01 09:32:03

touching files

Time of First Successful Submission: 2026-04-01 09:38:14

removing files

Time of First Successful Submission: 2026-04-01 09:39:46

moving files

Time of First Successful Submission: 2026-04-01 09:40:31

copying files

Time of First Successful Submission: 2026-04-01 09:41:12

hidden files

Time of First Successful Submission: 2026-04-01 09:44:24

An Epic Filesystem Quest

Time of First Successful Submission: 2026-04-01 09:48:50

making directories

Time of First Successful Submission: 2026-04-01 09:49:46

finding files

Time of First Successful Submission: 2026-04-03 09:15:12

linking files

Time of First Successful Submission: 2026-04-01 19:48:53

Learning From Documentation

Time of First Successful Submission: 2026-04-01 20:04:07

Learning Complex Usage

Time of First Successful Submission: 2026-04-01 20:10:29

Reading Manuals

Time of First Successful Submission: 2026-04-01 20:13:34

Searching Manuals

Time of First Successful Submission: 2026-04-01 20:14:45

Searching For Manuals

Time of First Successful Submission: 2026-04-01 20:23:05

Helpful Programs

Time of First Successful Submission: 2026-04-01 20:25:07

Help for Builtins

Time of First Successful Submission: 2026-04-01 20:27:22

Matching with *

Time of First Successful Submission: 2026-04-02 09:03:59

Matching with ?

Time of First Successful Submission: 2026-04-02 09:04:55

Matching with []

Time of First Successful Submission: 2026-04-02 09:08:33

Matching paths with []

Time of First Successful Submission: 2026-04-02 09:09:44

Multiple globs

Time of First Successful Submission: 2026-04-02 09:11:18

Mixing globs

Time of First Successful Submission: 2026-04-02 09:18:03

Exclusionary globbing

Time of First Successful Submission: 2026-04-02 09:23:03

Tab completion

Time of First Successful Submission: 2026-04-02 09:24:11

Multiple options for tab completion

Time of First Successful Submission: 2026-04-02 09:25:20

Tab completion on commands

Time of First Successful Submission: 2026-04-02 09:25:40

Redirecting output

Time of First Successful Submission: 2026-04-02 09:32:16

Redirecting more output

Time of First Successful Submission: 2026-04-02 09:33:37

Appending output

Time of First Successful Submission: 2026-04-02 09:36:14

Redirecting errors

Time of First Successful Submission: 2026-04-02 09:46:24

Redirecting input

Time of First Successful Submission: 2026-04-02 09:49:09

Grepping stored results

Time of First Successful Submission: 2026-04-02 09:50:56

Grepping live output

Time of First Successful Submission: 2026-04-02 09:52:44

Grepping errors

Time of First Successful Submission: 2026-04-02 09:56:59

Filtering with grep -v

Time of First Successful Submission: 2026-04-02 10:02:08

Filtering with sed

Time of First Successful Submission: 2026-04-02 12:08:40

Duplicating piped data with tee

Time of First Successful Submission: 2026-04-02 14:47:20

Process substitution for input

Time of First Successful Submission: 2026-04-02 14:53:08

Writing to multiple programs

Time of First Successful Submission: 2026-04-02 15:06:40

Split-piping stderr and stdout

Time of First Successful Submission: 2026-04-02 15:22:29

Named pipes

Time of First Successful Submission: 2026-04-02 15:33:55

Printing Variables

Time of First Successful Submission: 2026-04-02 21:29:46

Setting Variables

Time of First Successful Submission: 2026-04-02 21:32:29

Multi-word Variables

Time of First Successful Submission: 2026-04-02 21:34:58

Exporting Variables

Time of First Successful Submission: 2026-04-02 21:39:40

Printing Exported Variables

Time of First Successful Submission: 2026-04-02 21:40:30

Storing Command Output

Time of First Successful Submission: 2026-04-02 21:48:21

Reading Input

Time of First Successful Submission: 2026-04-02 21:55:49

Reading Files

Time of First Successful Submission: 2026-04-02 21:57:25

Translating characters

Time of First Successful Submission: 2026-04-03 08:53:17

Deleting characters

Time of First Successful Submission: 2026-04-03 08:53:56

Deleting newlines

Time of First Successful Submission: 2026-04-03 08:59:02

Extracting the first lines with head

Time of First Successful Submission: 2026-04-03 08:59:47

Extracting specific sections of text

Time of First Successful Submission: 2026-04-03 09:06:20

Sorting data

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

Listing Processes

Time of First Successful Submission: 2026-04-03 14:06:36

Killing Processes

Time of First Successful Submission: 2026-04-03 14:08:59

Interrupting Processes

Time of First Successful Submission: 2026-04-03 14:09:31

Killing Misbehaving Processes

Time of First Successful Submission: 2026-04-03 14:19:21

Suspending Processes

Time of First Successful Submission: 2026-04-03 14:23:30

Resuming Processes

Time of First Successful Submission: 2026-04-03 14:23:54

Backgrounding Processes

Time of First Successful Submission: 2026-04-03 14:26:02

Foregrounding Processes

Time of First Successful Submission: 2026-04-03 14:27:56

Starting Backgrounded Processes

Time of First Successful Submission: 2026-04-03 14:28:40

Process Exit Codes

Time of First Successful Submission: 2026-04-03 14:30:10

Becoming root with su

Time of First Successful Submission: 2026-04-03 14:40:09

Other users with su

Time of First Successful Submission: 2026-04-03 14:43:54

Cracking passwords

Time of First Successful Submission: 2026-04-03 14:50:41

Using sudo

Time of First Successful Submission: 2026-04-03 14:54:30

Changing File Ownership

Time of First Successful Submission: 2026-04-03 15:46:10

Groups and Files

Time of First Successful Submission: 2026-04-03 15:50:48

Fun With Groups Names

Time of First Successful Submission: 2026-04-03 16:48:04

Changing Permissions

Time of First Successful Submission: 2026-04-03 16:52:25

Executable Files

Time of First Successful Submission: 2026-04-03 16:54:46

Permission Tweaking Practice

Time of First Successful Submission: 2026-04-03 17:01:15

Permissions Setting Practice

Time of First Successful Submission: 2026-04-03 17:18:11

The SUID Bit

Time of First Successful Submission: 2026-04-03 15:16:13

Chaining with Semicolons

Time of First Successful Submission: 2026-04-03 19:51:54

Building on Success

Time of First Successful Submission: 2026-04-03 19:52:49

Handling Failure

Time of First Successful Submission: 2026-04-03 19:53:35

Your First Shell Script

Time of First Successful Submission: 2026-04-03 19:55:40

Redirecting Script Output

Time of First Successful Submission: 2026-04-03 20:07:49

Executable Shell Scripts

Time of First Successful Submission: 2026-04-03 20:19:44

Understanding Shebangs

Time of First Successful Submission: 2026-04-03 20:43:13

Scripting with Arguments

Time of First Successful Submission: 2026-04-03 20:56:08

Scripting with Conditionals

Time of First Successful Submission: 2026-04-03 21:02:12

Scripting with Default Cases

Time of First Successful Submission: 2026-04-03 21:08:29

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-04-03 21:12:17

Reading Shell Scripts

Time of First Successful Submission: 2026-04-03 21:13:37

Launching Screen

Time of First Successful Submission: 2026-04-05 13:18:21

Detaching and Attaching

Time of First Successful Submission: 2026-04-03 21:47:39

Finding Sessions

Time of First Successful Submission: 2026-04-07 14:45:21

Switching Windows

Time of First Successful Submission: 2026-04-07 14:46:20

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-04-03 22:11:52

Switching Windows (tmux)

Time of First Successful Submission: 2026-04-03 22:13:18

The PATH Variable

Time of First Successful Submission: 2026-04-05 13:24:27

Setting PATH

Time of First Successful Submission: 2026-04-05 13:26:26

Finding Commands

Time of First Successful Submission: 2026-04-05 13:28:48

Adding Commands

Time of First Successful Submission: 2026-04-05 13:47:17

Hijacking Commands

Time of First Successful Submission: 2026-04-05 13:53:44

Bashrc Backdoor

Time of First Successful Submission: 2026-04-05 15:10:25

Sniffing Input

Time of First Successful Submission: 2026-04-05 15:26:22

Overshared Directories

Time of First Successful Submission: 2026-04-05 18:14:07

Tricky Linking

Time of First Successful Submission: 2026-04-05 18:22:05

Sniffing Process Arguments

Time of First Successful Submission: 2026-04-05 18:26:47

Snooping on Configurations

Time of First Successful Submission: 2026-04-05 18:30:44

The Fork Bomb

Time of First Successful Submission: 2026-04-05 18:55:53

Disk-Space Doomsday

Time of First Successful Submission: 2026-04-05 21:21:56

rm -rf /

Time of First Successful Submission: 2026-04-05 21:25:21

Life after rm -rf /

Time of First Successful Submission: 2026-04-05 21:30:51

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-04-05 21:33:45


Computing 101

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Your First Register

Time of First Successful Submission: 2026-04-05 22:41:48

Your First Syscall

Time of First Successful Submission: 2026-04-08 08:28:19

Exit Codes

Time of First Successful Submission: 2026-04-08 08:30:09

Building Executables

Time of First Successful Submission: 2026-04-08 08:37:00

Moving Between Registers

Time of First Successful Submission: 2026-04-08 08:48:31

Loading From Memory

Time of First Successful Submission: 2026-04-21 09:35:31

More Loading Practice

Time of First Successful Submission: 2026-04-21 09:38:25

Dereferencing Pointers

Time of First Successful Submission: 2026-04-21 13:47:56


GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-03-31 21:30:14

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-03 09:20:35

Using the GUI Desktop

Time of First Successful Submission: 2026-04-03 09:22:39

Pasting into the Desktop

Time of First Successful Submission: 2026-04-03 09:23:53

Restarting Challenges

Time of First Successful Submission: 2026-04-03 09:25:23

Challenge Programs

Time of First Successful Submission: 2026-04-02 21:02:34

The Flag File

Time of First Successful Submission: 2026-04-02 21:03:23

Using Privileged Mode

Time of First Successful Submission: 2026-04-02 21:07:12

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-02 21:09:54

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-02 21:12:46