jhchan4

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-01-10 05:55:59

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

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Piping Stdout

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Piping Stdin

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Start Here

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Using the Terminal

Time of First Successful Submission: 2025-12-30 15:03:20

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-07 04:27:26

Using the GUI Desktop

Time of First Successful Submission: 2026-01-07 04:30:18

Pasting into the Desktop

Time of First Successful Submission: 2026-01-07 04:31:47

Restarting Challenges

Time of First Successful Submission: 2026-01-07 04:34:48

Challenge Programs

Time of First Successful Submission: 2026-01-07 04:40:24

The Flag File

Time of First Successful Submission: 2026-01-07 07:24:56

Using Privileged Mode

Time of First Successful Submission: 2026-01-07 07:33:26

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-10 05:53:41

Persistent Home Directories - Two

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Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-01-10 05:55:59

Intro to Arguments

Time of First Successful Submission: 2026-01-10 06:00:13

Command History

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The Root

Time of First Successful Submission: 2026-01-10 06:01:08

Program and absolute paths

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Position thy self

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Position elsewhere

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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

Time of First Successful Submission: 2026-01-10 06:09:25

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

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comparing files

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listing files

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touching files

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removing files

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moving files

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copying files

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hidden files

Time of First Successful Submission: 2026-01-10 06:19:16

An Epic Filesystem Quest

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making directories

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finding files

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linking files

Time of First Successful Submission: 2026-01-10 06:28:12

Learning From Documentation

Time of First Successful Submission: 2026-01-10 06:36:21

Learning Complex Usage

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Reading Manuals

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Searching Manuals

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Searching For Manuals

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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

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Tab completion on commands

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Redirecting output

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Redirecting more output

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Appending output

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Redirecting errors

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Redirecting input

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Grepping stored results

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Grepping live output

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Grepping errors

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Filtering with grep -v

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Filtering with sed

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Duplicating piped data with tee

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Process substitution for input

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Writing to multiple programs

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Split-piping stderr and stdout

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Named pipes

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Printing Variables

Time of First Successful Submission: 2026-01-14 14:37:21

Setting Variables

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Multi-word Variables

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Exporting Variables

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Printing Exported Variables

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Storing Command Output

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Reading Input

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Reading Files

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Translating characters

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Deleting characters

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Deleting newlines

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Extracting the first lines with head

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Extracting specific sections of text

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Sorting data

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Listing Processes

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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: 2026-01-15 07:41:09

Using sudo

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Changing File Ownership

Time of First Successful Submission: 2026-01-15 07:43:16

Groups and Files

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Fun With Groups Names

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Changing Permissions

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Executable Files

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Permission Tweaking Practice

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Permissions Setting Practice

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The SUID Bit

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Playing With Programs

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cat

Time of First Successful Submission: 2022-09-19 06:25:32

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

Time of First Successful Submission: 2022-09-19 06:51:44

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

Time of First Successful Submission: 2022-09-19 08:22:41

sed

Time of First Successful Submission: 2022-09-19 08:23:29

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2025-12-30 15:03:20

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-07 04:27:26

Using the GUI Desktop

Time of First Successful Submission: 2026-01-07 04:30:18

Pasting into the Desktop

Time of First Successful Submission: 2026-01-07 04:31:47

Restarting Challenges

Time of First Successful Submission: 2026-01-07 04:34:48

Challenge Programs

Time of First Successful Submission: 2026-01-07 04:40:24

The Flag File

Time of First Successful Submission: 2026-01-07 07:24:56

Using Privileged Mode

Time of First Successful Submission: 2026-01-07 07:33:26

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-10 05:53:41

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-10 05:54:04