cat1000101

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-01-22 14:59:04

Command Arguments

Time of First Successful Submission: 2026-01-22 15:00:25

Command History

Time of First Successful Submission: 2026-01-22 15:01:04

The Root Path

Time of First Successful Submission: 2026-01-22 15:01:43

Absolute Paths

Time of First Successful Submission: 2026-01-22 15:02:35

Changing position

Time of First Successful Submission: 2026-01-22 15:03:16

Changing to an Absolute Path

Time of First Successful Submission: 2026-01-22 15:04:24

Relative Paths

Time of First Successful Submission: 2026-01-22 15:06:20

Cat

Time of First Successful Submission: 2026-01-22 17:22:33

Ls

Time of First Successful Submission: 2026-01-22 17:26:48

Ls All

Time of First Successful Submission: 2026-01-22 17:31:04

Find

Time of First Successful Submission: 2026-01-22 17:38:42

Piping Echo

Time of First Successful Submission: 2026-01-22 17:51:02

Piping Stdout

Time of First Successful Submission: 2026-01-22 17:53:01

Piping Stdin

Time of First Successful Submission: 2026-01-22 17:58:04


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-01-10 18:45:03

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-10 18:47:12

Using the GUI Desktop

Time of First Successful Submission: 2026-01-10 18:49:10

Pasting into the Desktop

Time of First Successful Submission: 2026-01-10 18:50:51

Restarting Challenges

Time of First Successful Submission: 2026-01-10 19:00:16

Challenge Programs

Time of First Successful Submission: 2026-01-10 19:04:56

The Flag File

Time of First Successful Submission: 2026-01-10 19:06:14

Using Privileged Mode

Time of First Successful Submission: 2026-01-10 19:11:01

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-10 19:13:19

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-10 19:13:56


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-01-22 14:59:04

Intro to Arguments

Time of First Successful Submission: 2026-01-22 15:00:25

Command History

Time of First Successful Submission: 2026-01-22 15:01:04

The Root

Time of First Successful Submission: 2026-01-22 15:01:43

Program and absolute paths

Time of First Successful Submission: 2026-01-22 15:02:35

Position thy self

Time of First Successful Submission: 2026-01-22 15:03:16

Position elsewhere

Time of First Successful Submission: 2026-01-22 15:04:24

implicit relative paths, from /

Time of First Successful Submission: 2026-01-22 15:06:20

explicit relative paths, from /

Time of First Successful Submission: 2026-01-22 15:07:42

implicit relative path

Time of First Successful Submission: 2026-01-22 15:08:27

home sweet home

Time of First Successful Submission: 2026-01-22 15:09:59

cat: not the pet, but the command!

Time of First Successful Submission: 2026-01-22 17:22:33

catting absolute paths

Time of First Successful Submission: 2026-01-22 17:23:13

more catting practice

Time of First Successful Submission: 2026-01-22 17:24:12

grepping for a needle in a haystack

Time of First Successful Submission: 2026-01-22 17:24:58

comparing files

Time of First Successful Submission: 2026-01-22 17:25:45

listing files

Time of First Successful Submission: 2026-01-22 17:26:48

touching files

Time of First Successful Submission: 2026-01-22 17:27:34

removing files

Time of First Successful Submission: 2026-01-22 17:28:13

moving files

Time of First Successful Submission: 2026-01-22 17:29:09

copying files

Time of First Successful Submission: 2026-01-22 17:29:54

hidden files

Time of First Successful Submission: 2026-01-22 17:31:04

An Epic Filesystem Quest

Time of First Successful Submission: 2026-01-22 17:34:36

making directories

Time of First Successful Submission: 2026-01-22 17:35:21

finding files

Time of First Successful Submission: 2026-01-22 17:38:42

linking files

Time of First Successful Submission: 2026-01-22 17:39:45

Redirecting output

Time of First Successful Submission: 2026-01-22 17:51:02

Redirecting more output

Time of First Successful Submission: 2026-01-22 17:53:01

Appending output

Time of First Successful Submission: 2026-01-22 17:54:14

Redirecting errors

Time of First Successful Submission: 2026-01-22 17:55:08

Redirecting input

Time of First Successful Submission: 2026-01-22 17:58:04

Grepping stored results

Time of First Successful Submission: 2026-01-22 17:59:28

Grepping live output

Time of First Successful Submission: 2026-01-22 18:00:26

Grepping errors

Time of First Successful Submission: 2026-01-22 18:01:45

Filtering with grep -v

Time of First Successful Submission: 2026-01-22 18:02:34

Filtering with sed

Time of First Successful Submission: 2026-01-22 18:03:52

Duplicating piped data with tee

Time of First Successful Submission: 2026-01-22 18:06:10

Process substitution for input

Time of First Successful Submission: 2026-01-22 18:07:58

Writing to multiple programs

Time of First Successful Submission: 2026-01-22 18:14:06

Split-piping stderr and stdout

Time of First Successful Submission: 2026-01-22 18:19:55

Named pipes

Time of First Successful Submission: 2026-01-22 18:24:52


Computing 101

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Tracing Syscalls

Time of First Successful Submission: 2026-01-22 21:55:12

Starting GDB

Time of First Successful Submission: 2026-01-22 21:55:54

Starting Programs in GDB

Time of First Successful Submission: 2026-01-22 21:56:39

set-register

Time of First Successful Submission: 2026-01-22 21:38:32

set-multiple-registers

Time of First Successful Submission: 2026-01-22 21:42:55

modulo-operation

Time of First Successful Submission: 2026-01-22 21:50:28

set-upper-byte

Time of First Successful Submission: 2026-01-22 21:52:24


GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-01-10 18:45:03

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-10 18:47:12

Using the GUI Desktop

Time of First Successful Submission: 2026-01-10 18:49:10

Pasting into the Desktop

Time of First Successful Submission: 2026-01-10 18:50:51

Connecting over SSH

Time of First Successful Submission: 2026-01-10 19:03:37

Restarting Challenges

Time of First Successful Submission: 2026-01-10 19:00:16

Getting Help

Time of First Successful Submission: 2026-01-10 19:02:36

Challenge Programs

Time of First Successful Submission: 2026-01-10 19:04:56

The Flag File

Time of First Successful Submission: 2026-01-10 19:06:14

Using Privileged Mode

Time of First Successful Submission: 2026-01-10 19:11:01

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-10 19:13:19

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-10 19:13:56