barfola

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-02-23 07:15:29

Command Arguments

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Command History

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The Root Path

Time of First Successful Submission: 2026-02-23 07:26:13

Absolute Paths

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Changing position

Time of First Successful Submission: 2026-02-23 07:29:34

Changing to an Absolute Path

Time of First Successful Submission: 2026-02-23 07:31:47

Relative Paths

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Cat

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Ls

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Ls All

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Find

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Piping Echo

Time of First Successful Submission: 2026-02-24 07:36:05

Piping Stdout

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Piping Stdin

Time of First Successful Submission: 2026-02-24 07:46:37


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-02-22 09:12:09

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-22 09:14:44

Using the GUI Desktop

Time of First Successful Submission: 2026-02-22 09:16:19

Pasting into the Desktop

Time of First Successful Submission: 2026-02-22 09:22:16

Restarting Challenges

Time of First Successful Submission: 2026-02-22 09:50:21

Challenge Programs

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

The Flag File

Time of First Successful Submission: 2026-02-23 06:09:40

Using Privileged Mode

Time of First Successful Submission: 2026-02-23 06:55:02

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-24 09:16:22

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-23 06:44:37


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-02-23 07:15:29

Intro to Arguments

Time of First Successful Submission: 2026-02-23 07:16:50

Command History

Time of First Successful Submission: 2026-02-23 07:17:59

The Root

Time of First Successful Submission: 2026-02-23 07:26:13

Program and absolute paths

Time of First Successful Submission: 2026-02-23 07:27:39

Position thy self

Time of First Successful Submission: 2026-02-23 07:29:34

Position elsewhere

Time of First Successful Submission: 2026-02-23 07:31:47

implicit relative paths, from /

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explicit relative paths, from /

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implicit relative path

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home sweet home

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cat: not the pet, but the command!

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catting absolute paths

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more catting practice

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grepping for a needle in a haystack

Time of First Successful Submission: 2026-02-23 07:53:09

comparing files

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listing files

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touching files

Time of First Successful Submission: 2026-02-23 07:59:02

removing files

Time of First Successful Submission: 2026-02-23 08:03:04

moving files

Time of First Successful Submission: 2026-02-23 08:15:38

copying files

Time of First Successful Submission: 2026-02-23 08:17:02

hidden files

Time of First Successful Submission: 2026-02-23 08:19:28

An Epic Filesystem Quest

Time of First Successful Submission: 2026-02-23 08:34:26

making directories

Time of First Successful Submission: 2026-02-23 08:37:55

finding files

Time of First Successful Submission: 2026-02-24 08:34:01

linking files

Time of First Successful Submission: 2026-02-23 09:00:29

Learning From Documentation

Time of First Successful Submission: 2026-02-24 06:03:56

Learning Complex Usage

Time of First Successful Submission: 2026-02-24 06:06:04

Reading Manuals

Time of First Successful Submission: 2026-02-24 06:09:24

Searching Manuals

Time of First Successful Submission: 2026-02-24 06:18:54

Searching For Manuals

Time of First Successful Submission: 2026-02-24 06:43:56

Helpful Programs

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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 []

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Multiple globs

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Mixing globs

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Exclusionary globbing

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Tab completion

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Multiple options for tab completion

Time of First Successful Submission: 2026-02-24 07:23:28

Tab completion on commands

Time of First Successful Submission: 2026-02-24 07:26:01

Redirecting output

Time of First Successful Submission: 2026-02-24 07:36:05

Redirecting more output

Time of First Successful Submission: 2026-02-24 07:38:23

Appending output

Time of First Successful Submission: 2026-02-24 07:40:29

Redirecting errors

Time of First Successful Submission: 2026-02-24 07:42:22

Redirecting input

Time of First Successful Submission: 2026-02-24 07:46:37

Grepping stored results

Time of First Successful Submission: 2026-02-24 07:47:50

Grepping live output

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Grepping errors

Time of First Successful Submission: 2026-02-24 07:52:41

Filtering with grep -v

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Filtering with sed

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Duplicating piped data with tee

Time of First Successful Submission: 2026-02-24 09:11:53

Process substitution for input

Time of First Successful Submission: 2026-02-24 08:26:48

Writing to multiple programs

Time of First Successful Submission: 2026-02-24 17:29:43

Split-piping stderr and stdout

Time of First Successful Submission: 2026-02-24 17:47:08

Named pipes

Time of First Successful Submission: 2026-02-24 18:05:00

Printing Variables

Time of First Successful Submission: 2026-02-24 18:27:07

Setting Variables

Time of First Successful Submission: 2026-02-24 18:31:38

Multi-word Variables

Time of First Successful Submission: 2026-02-24 18:34:30

Exporting Variables

Time of First Successful Submission: 2026-02-24 18:39:44

Printing Exported Variables

Time of First Successful Submission: 2026-02-24 18:40:40

Storing Command Output

Time of First Successful Submission: 2026-02-24 18:49:03

Reading Input

Time of First Successful Submission: 2026-02-24 18:56:26

Reading Files

Time of First Successful Submission: 2026-02-24 18:54:33

Deleting characters

Time of First Successful Submission: 2026-02-24 19:02:05

Deleting newlines

Time of First Successful Submission: 2026-02-24 19:04:05

Extracting the first lines with head

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Extracting specific sections of text

Time of First Successful Submission: 2026-02-24 19:19:37

Sorting data

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Listing Processes

Time of First Successful Submission: 2026-02-25 06:10:58

Killing Processes

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Interrupting Processes

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Killing Misbehaving Processes

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Suspending Processes

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Resuming Processes

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Backgrounding Processes

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Foregrounding Processes

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Starting Backgrounded Processes

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Process Exit Codes

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Becoming root with su

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Other users with su

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Cracking passwords

Time of First Successful Submission: 2026-02-25 06:46:18

Using sudo

Time of First Successful Submission: 2026-02-25 06:51:54

Changing File Ownership

Time of First Successful Submission: 2026-02-25 07:06:35

Groups and Files

Time of First Successful Submission: 2026-02-25 07:12:02

Fun With Groups Names

Time of First Successful Submission: 2026-02-25 07:14:05

Changing Permissions

Time of First Successful Submission: 2026-02-25 07:24:31

Executable Files

Time of First Successful Submission: 2026-02-25 07:26:38

Permission Tweaking Practice

Time of First Successful Submission: 2026-02-25 07:31:46

Permissions Setting Practice

Time of First Successful Submission: 2026-02-25 07:43:12

The SUID Bit

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Chaining with Semicolons

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Building on Success

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Handling Failure

Time of First Successful Submission: 2026-02-25 08:33:48

Your First Shell Script

Time of First Successful Submission: 2026-02-25 08:52:28

Redirecting Script Output

Time of First Successful Submission: 2026-02-25 08:58:08

Executable Shell Scripts

Time of First Successful Submission: 2026-02-25 09:00:55

Understanding Shebangs

Time of First Successful Submission: 2026-02-25 09:07:21

Scripting with Arguments

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Scripting with Conditionals

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Scripting with Default Cases

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Scripting with Multiple Conditions

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Reading Shell Scripts

Time of First Successful Submission: 2026-02-25 09:40:33

Launching Screen

Time of First Successful Submission: 2026-02-25 10:41:56

Detaching and Attaching

Time of First Successful Submission: 2026-02-25 10:45:09

Finding Sessions

Time of First Successful Submission: 2026-02-25 10:47:08

Switching Windows

Time of First Successful Submission: 2026-02-25 10:54:26

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-02-25 10:59:20

Switching Windows (tmux)

Time of First Successful Submission: 2026-02-25 11:03:16

The PATH Variable

Time of First Successful Submission: 2026-02-25 11:05:50

Setting PATH

Time of First Successful Submission: 2026-02-25 11:11:02

Finding Commands

Time of First Successful Submission: 2026-02-25 11:16:29

Adding Commands

Time of First Successful Submission: 2026-02-25 11:27:17

Hijacking Commands

Time of First Successful Submission: 2026-02-25 11:47:35

Bashrc Backdoor

Time of First Successful Submission: 2026-02-25 12:40:46

Sniffing Input

Time of First Successful Submission: 2026-02-25 12:50:43

Overshared Directories

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Tricky Linking

Time of First Successful Submission: 2026-02-26 08:39:50

Sniffing Process Arguments

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Snooping on Configurations

Time of First Successful Submission: 2026-02-26 08:58:45

The Fork Bomb

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Disk-Space Doomsday

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rm -rf /

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Life after rm -rf /

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Finding meaning after rm -rf /

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


GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-02-22 09:12:09

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-22 09:14:44

Using the GUI Desktop

Time of First Successful Submission: 2026-02-22 09:16:19

Pasting into the Desktop

Time of First Successful Submission: 2026-02-22 09:22:16

Connecting over SSH

Time of First Successful Submission: 2026-02-22 09:41:35

Restarting Challenges

Time of First Successful Submission: 2026-02-22 09:50:21

Getting Help

Time of First Successful Submission: 2026-02-22 09:56:30

Challenge Programs

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

The Flag File

Time of First Successful Submission: 2026-02-23 06:09:40

Using Privileged Mode

Time of First Successful Submission: 2026-02-23 06:55:02

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-24 09:16:22

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-23 06:44:37