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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-02-05 15:00:48

Command Arguments

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Command History

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The Root Path

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Absolute Paths

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Changing position

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Changing to an Absolute Path

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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: 2026-02-06 06:10:24

Piping Stdout

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Piping Stdin

Time of First Successful Submission: 2026-02-06 06:16:38


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-02-05 14:34:47

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-05 14:36:35

Using the GUI Desktop

Time of First Successful Submission: 2026-02-05 14:43:38

Pasting into the Desktop

Time of First Successful Submission: 2026-02-05 14:45:03

Restarting Challenges

Time of First Successful Submission: 2026-02-05 14:46:24

Challenge Programs

Time of First Successful Submission: 2026-02-05 14:48:07

The Flag File

Time of First Successful Submission: 2026-02-05 14:50:05

Using Privileged Mode

Time of First Successful Submission: 2026-02-05 14:51:40

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-05 14:53:12

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-05 14:53:44


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-02-05 15:00:48

Intro to Arguments

Time of First Successful Submission: 2026-02-05 15:01:29

Command History

Time of First Successful Submission: 2026-02-05 15:02:17

The Root

Time of First Successful Submission: 2026-02-05 15:03:07

Program and absolute paths

Time of First Successful Submission: 2026-02-05 15:04:06

Position thy self

Time of First Successful Submission: 2026-02-05 15:05:06

Position elsewhere

Time of First Successful Submission: 2026-02-05 15:07:33

implicit relative paths, from /

Time of First Successful Submission: 2026-02-05 15:12:46

explicit relative paths, from /

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implicit relative path

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home sweet home

Time of First Successful Submission: 2026-02-05 15:16:33

cat: not the pet, but the command!

Time of First Successful Submission: 2026-02-05 21:02:05

catting absolute paths

Time of First Successful Submission: 2026-02-05 21:02:39

more catting practice

Time of First Successful Submission: 2026-02-05 21:06:19

grepping for a needle in a haystack

Time of First Successful Submission: 2026-02-05 21:07:21

comparing files

Time of First Successful Submission: 2026-02-05 21:08:37

listing files

Time of First Successful Submission: 2026-02-05 21:09:23

touching files

Time of First Successful Submission: 2026-02-05 21:10:00

removing files

Time of First Successful Submission: 2026-02-05 21:10:56

moving files

Time of First Successful Submission: 2026-02-05 21:11:59

copying files

Time of First Successful Submission: 2026-02-05 21:12:31

hidden files

Time of First Successful Submission: 2026-02-05 21:13:04

An Epic Filesystem Quest

Time of First Successful Submission: 2026-02-05 21:20:42

making directories

Time of First Successful Submission: 2026-02-05 21:22:28

finding files

Time of First Successful Submission: 2026-02-05 21:25:36

linking files

Time of First Successful Submission: 2026-02-05 21:43:47

Learning From Documentation

Time of First Successful Submission: 2026-02-05 22:09:27

Learning Complex Usage

Time of First Successful Submission: 2026-02-05 22:10:38

Reading Manuals

Time of First Successful Submission: 2026-02-05 22:14:47

Searching Manuals

Time of First Successful Submission: 2026-02-05 22:17:01

Searching For Manuals

Time of First Successful Submission: 2026-02-05 22:28:03

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

Time of First Successful Submission: 2026-02-05 22:50:24

Tab completion

Time of First Successful Submission: 2026-02-05 22:52:04

Multiple options for tab completion

Time of First Successful Submission: 2026-02-05 22:54:37

Tab completion on commands

Time of First Successful Submission: 2026-02-05 22:55:22

Redirecting output

Time of First Successful Submission: 2026-02-06 06:10:24

Redirecting more output

Time of First Successful Submission: 2026-02-06 06:11:38

Appending output

Time of First Successful Submission: 2026-02-06 06:13:05

Redirecting errors

Time of First Successful Submission: 2026-02-06 06:15:16

Redirecting input

Time of First Successful Submission: 2026-02-06 06:16:38

Grepping stored results

Time of First Successful Submission: 2026-02-06 06:17:30

Grepping live output

Time of First Successful Submission: 2026-02-06 06:18:04

Grepping errors

Time of First Successful Submission: 2026-02-06 06:19:17

Filtering with grep -v

Time of First Successful Submission: 2026-02-06 06:20:02

Filtering with sed

Time of First Successful Submission: 2026-02-06 06:21:20

Duplicating piped data with tee

Time of First Successful Submission: 2026-02-06 06:28:01

Process substitution for input

Time of First Successful Submission: 2026-02-06 07:59:51

Writing to multiple programs

Time of First Successful Submission: 2026-02-06 08:03:57

Split-piping stderr and stdout

Time of First Successful Submission: 2026-02-06 08:05:49

Named pipes

Time of First Successful Submission: 2026-02-06 08:18:48

Printing Variables

Time of First Successful Submission: 2026-02-06 08:20:18

Setting Variables

Time of First Successful Submission: 2026-02-06 08:20:49

Multi-word Variables

Time of First Successful Submission: 2026-02-06 08:21:54

Exporting Variables

Time of First Successful Submission: 2026-02-06 08:25:41

Printing Exported Variables

Time of First Successful Submission: 2026-02-06 08:27:05

Storing Command Output

Time of First Successful Submission: 2026-02-06 08:29:39

Reading Input

Time of First Successful Submission: 2026-02-06 08:32:23

Reading Files

Time of First Successful Submission: 2026-02-06 08:37:23

Translating characters

Time of First Successful Submission: 2026-02-06 08:40:23

Deleting characters

Time of First Successful Submission: 2026-02-06 08:41:08

Deleting newlines

Time of First Successful Submission: 2026-02-06 08:41:53

Extracting the first lines with head

Time of First Successful Submission: 2026-02-06 08:42:50

Extracting specific sections of text

Time of First Successful Submission: 2026-02-06 08:44:27

Sorting data

Time of First Successful Submission: 2026-02-06 08:45:23


Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-01-17 14:34:00

... and again!

Time of First Successful Submission: 2026-01-17 15:25:35

Newline Troubles

Time of First Successful Submission: 2026-01-17 15:30:51

Reasoning about files

Time of First Successful Submission: 2026-01-17 22:34:54

Specifying Filenames

Time of First Successful Submission: 2026-01-17 22:36:51

Binary and Hex Encoding

Time of First Successful Submission: 2026-01-17 22:55:59

More Hex

Time of First Successful Submission: 2026-01-17 22:58:10

Decoding Hex

Time of First Successful Submission: 2026-01-17 23:05:42

Decoding Practice

Time of First Successful Submission: 2026-01-18 07:49:54

Encoding Practice

Time of First Successful Submission: 2026-01-18 07:58:26

Hex-encoding ASCII

Time of First Successful Submission: 2026-01-18 08:06:21

Nested Encoding

Time of First Successful Submission: 2026-01-18 09:40:58

Hex-encoding UTF-8

Time of First Successful Submission: 2026-01-18 09:44:50

UTF Mixups

Time of First Successful Submission: 2026-01-18 09:49:40

Modifying Encoded Data

Time of First Successful Submission: 2026-01-18 10:04:35

Decoding Base64

Time of First Successful Submission: 2026-01-18 10:32:18

Encoding Base64

Time of First Successful Submission: 2026-01-18 10:39:20

Dealing with Obfuscation

Time of First Successful Submission: 2026-01-18 10:41:18

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-01-18 10:45:20

Your First HTTP Request

Time of First Successful Submission: 2026-02-03 11:07:39

Reading Flask

Time of First Successful Submission: 2026-02-03 11:11:30

Commented Data

Time of First Successful Submission: 2026-02-03 11:52:38

HTTP Metadata

Time of First Successful Submission: 2026-02-03 11:54:53

HTTP (netcat)

Time of First Successful Submission: 2026-02-03 12:06:23

HTTP Paths (netcat)

Time of First Successful Submission: 2026-02-03 12:07:58

HTTP (curl)

Time of First Successful Submission: 2026-02-03 12:09:23

HTTP (python)

Time of First Successful Submission: 2026-02-03 12:14:59

HTTP Host Header (python)

Time of First Successful Submission: 2026-02-03 12:29:49

HTTP Host Header (curl)

Time of First Successful Submission: 2026-02-03 12:54:02

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-02-03 13:01:49

URL Encoding (netcat)

Time of First Successful Submission: 2026-02-03 13:34:56

HTTP GET Parameters

Time of First Successful Submission: 2026-02-03 13:37:27

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-02-03 13:53:09

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-02-03 13:56:56

HTTP Forms

Time of First Successful Submission: 2026-02-03 14:15:16

HTTP Forms (curl)

Time of First Successful Submission: 2026-02-03 14:16:32

HTTP Forms (netcat)

Time of First Successful Submission: 2026-02-03 14:36:49

HTTP Forms (python)

Time of First Successful Submission: 2026-02-03 14:41:31

HTTP Forms Without Forms

Time of First Successful Submission: 2026-02-03 15:20:48

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-02-03 15:23:00

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-02-03 15:36:51

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-02-03 15:50:56

HTTP Redirects (curl)

Time of First Successful Submission: 2026-02-03 15:52:22

HTTP Redirects (python)

Time of First Successful Submission: 2026-02-03 15:53:47

HTTP Cookies (curl)

Time of First Successful Submission: 2026-02-03 16:04:35

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-02-03 16:06:36

HTTP Cookies (python)

Time of First Successful Submission: 2026-02-03 16:09:18

Server State (python)

Time of First Successful Submission: 2026-02-03 16:16:55

Listening Web

Time of First Successful Submission: 2026-02-03 16:20:06

Speaking Redirects

Time of First Successful Submission: 2026-02-03 16:35:54

JavaScript Redirects

Time of First Successful Submission: 2026-02-03 20:49:02

Including JavaScript

Time of First Successful Submission: 2026-02-03 21:22:18

HTTP (javascript)

Time of First Successful Submission: 2026-02-03 21:46:11

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-02-03 21:51:34

HTTP Forms (javascript)

Time of First Successful Submission: 2026-02-03 22:24:32

cat

Time of First Successful Submission: 2022-10-20 20:39:56

more

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less

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tail

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head

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sort

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vim

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emacs

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nano

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rev

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od

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hd

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xxd

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base32

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base64

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split

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gzip

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bzip2

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zip

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tar

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ar

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cpio

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genisoimage

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env

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find

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make

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nice

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timeout

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stdbuf

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setarch

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watch

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socat

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whiptail

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awk

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sed

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ed

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chown

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chmod

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cp

Time of First Successful Submission: 2022-10-21 11:02:53

mv

Time of First Successful Submission: 2022-10-21 12:30:02

perl

Time of First Successful Submission: 2022-10-21 12:36:44

python

Time of First Successful Submission: 2022-10-21 12:37:58

ruby

Time of First Successful Submission: 2022-10-21 12:40:47

bash

Time of First Successful Submission: 2022-10-21 12:41:30

date

Time of First Successful Submission: 2022-10-21 12:42:42

dmesg

Time of First Successful Submission: 2022-10-21 12:44:08

wc

Time of First Successful Submission: 2022-10-21 12:46:41

gcc

Time of First Successful Submission: 2022-10-21 12:54:32

as

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wget

Time of First Successful Submission: 2022-10-21 14:21:16

ssh-keygen

Time of First Successful Submission: 2026-02-03 22:45:29

SQL Queries

Time of First Successful Submission: 2026-02-04 20:34:40

Filtering SQL

Time of First Successful Submission: 2026-02-04 20:42:39

Choosing Columns

Time of First Successful Submission: 2026-02-04 20:48:17

Exclusionary Filtering

Time of First Successful Submission: 2026-02-04 20:55:23

Filtering Strings

Time of First Successful Submission: 2026-02-04 20:57:04

Filtering on Expressions

Time of First Successful Submission: 2026-02-04 21:00:04

SELECTing Expressions

Time of First Successful Submission: 2026-02-05 08:04:25

Composite Conditions

Time of First Successful Submission: 2026-02-05 08:12:04

Reaching Your LIMITs

Time of First Successful Submission: 2026-02-05 08:15:00

Querying Metadata

Time of First Successful Submission: 2026-02-05 08:28:35


GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-02-05 14:34:47

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-05 14:36:35

Using the GUI Desktop

Time of First Successful Submission: 2026-02-05 14:43:38

Pasting into the Desktop

Time of First Successful Submission: 2026-02-05 14:45:03

Connecting over SSH

Time of First Successful Submission: 2026-02-05 20:56:32

Restarting Challenges

Time of First Successful Submission: 2026-02-05 14:46:24

Getting Help

Time of First Successful Submission: 2026-02-05 14:56:21

Challenge Programs

Time of First Successful Submission: 2026-02-05 14:48:07

The Flag File

Time of First Successful Submission: 2026-02-05 14:50:05

Using Privileged Mode

Time of First Successful Submission: 2026-02-05 14:51:40

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-05 14:53:12

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-05 14:53:44