phasmid

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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-04-15 20:33:23

Command Arguments

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Command History

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The Root Path

Time of First Successful Submission: 2026-04-15 20:39:18

Absolute Paths

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Changing position

Time of First Successful Submission: 2026-04-15 20:40:37

Changing to an Absolute Path

Time of First Successful Submission: 2026-04-15 20:42:26

Relative Paths

Time of First Successful Submission: 2026-04-15 20:49:59

Cat

Time of First Successful Submission: 2026-04-16 13:04:33

Ls

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Ls All

Time of First Successful Submission: 2026-04-16 13:21:32

Find

Time of First Successful Submission: 2026-04-16 13:31:06

Piping Echo

Time of First Successful Submission: 2026-04-17 12:37:34

Piping Stdout

Time of First Successful Submission: 2026-04-17 12:40:01

Piping Stdin

Time of First Successful Submission: 2026-04-17 13:08:13


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-04-15 19:32:27

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-15 19:33:49

Using the GUI Desktop

Time of First Successful Submission: 2026-04-15 19:38:49

Pasting into the Desktop

Time of First Successful Submission: 2026-04-15 19:41:10

Restarting Challenges

Time of First Successful Submission: 2026-04-15 19:49:12

Challenge Programs

Time of First Successful Submission: 2026-04-15 19:56:18

The Flag File

Time of First Successful Submission: 2026-04-15 19:57:16

Using Privileged Mode

Time of First Successful Submission: 2026-04-15 20:01:51

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-15 20:04:12

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-15 20:07:03


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-04-15 20:33:23

Intro to Arguments

Time of First Successful Submission: 2026-04-15 20:33:53

Command History

Time of First Successful Submission: 2026-04-15 20:34:28

The Root

Time of First Successful Submission: 2026-04-15 20:39:18

Program and absolute paths

Time of First Successful Submission: 2026-04-15 20:39:54

Position thy self

Time of First Successful Submission: 2026-04-15 20:40:37

Position elsewhere

Time of First Successful Submission: 2026-04-15 20:42:26

implicit relative paths, from /

Time of First Successful Submission: 2026-04-15 20:49:59

explicit relative paths, from /

Time of First Successful Submission: 2026-04-15 20:50:57

implicit relative path

Time of First Successful Submission: 2026-04-15 20:51:46

home sweet home

Time of First Successful Submission: 2026-04-15 20:54:43

cat: not the pet, but the command!

Time of First Successful Submission: 2026-04-16 13:04:33

catting absolute paths

Time of First Successful Submission: 2026-04-16 13:05:02

more catting practice

Time of First Successful Submission: 2026-04-16 13:09:10

grepping for a needle in a haystack

Time of First Successful Submission: 2026-04-16 13:11:02

comparing files

Time of First Successful Submission: 2026-04-16 13:16:20

listing files

Time of First Successful Submission: 2026-04-16 13:17:54

touching files

Time of First Successful Submission: 2026-04-16 13:18:43

removing files

Time of First Successful Submission: 2026-04-16 13:19:20

moving files

Time of First Successful Submission: 2026-04-16 13:20:17

copying files

Time of First Successful Submission: 2026-04-16 13:20:58

hidden files

Time of First Successful Submission: 2026-04-16 13:21:32

An Epic Filesystem Quest

Time of First Successful Submission: 2026-04-16 13:26:39

making directories

Time of First Successful Submission: 2026-04-16 13:28:25

finding files

Time of First Successful Submission: 2026-04-16 13:31:06

linking files

Time of First Successful Submission: 2026-04-16 13:51:55

Learning From Documentation

Time of First Successful Submission: 2026-04-16 13:57:36

Learning Complex Usage

Time of First Successful Submission: 2026-04-16 14:00:26

Reading Manuals

Time of First Successful Submission: 2026-04-16 14:04:36

Searching Manuals

Time of First Successful Submission: 2026-04-16 14:06:26

Searching For Manuals

Time of First Successful Submission: 2026-04-16 14:17:47

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

Time of First Successful Submission: 2026-04-17 00:43:58

Exclusionary globbing

Time of First Successful Submission: 2026-04-17 00:47:18

Tab completion

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Multiple options for tab completion

Time of First Successful Submission: 2026-04-17 00:49:50

Tab completion on commands

Time of First Successful Submission: 2026-04-17 00:50:19

Redirecting output

Time of First Successful Submission: 2026-04-17 12:37:34

Redirecting more output

Time of First Successful Submission: 2026-04-17 12:40:01

Appending output

Time of First Successful Submission: 2026-04-17 12:50:50

Redirecting errors

Time of First Successful Submission: 2026-04-17 12:55:09

Redirecting input

Time of First Successful Submission: 2026-04-17 13:08:13

Grepping stored results

Time of First Successful Submission: 2026-04-17 14:29:42

Grepping live output

Time of First Successful Submission: 2026-04-17 14:30:27

Grepping errors

Time of First Successful Submission: 2026-04-17 14:32:16

Filtering with grep -v

Time of First Successful Submission: 2026-04-17 14:34:29

Filtering with sed

Time of First Successful Submission: 2026-04-17 14:38:57

Duplicating piped data with tee

Time of First Successful Submission: 2026-04-17 15:03:21

Process substitution for input

Time of First Successful Submission: 2026-04-17 15:11:14

Writing to multiple programs

Time of First Successful Submission: 2026-04-17 15:19:33

Split-piping stderr and stdout

Time of First Successful Submission: 2026-04-17 15:31:28

Named pipes

Time of First Successful Submission: 2026-04-17 16:01:13

Printing Variables

Time of First Successful Submission: 2026-04-17 18:14:24

Setting Variables

Time of First Successful Submission: 2026-04-17 18:21:02

Multi-word Variables

Time of First Successful Submission: 2026-04-17 18:22:42

Exporting Variables

Time of First Successful Submission: 2026-04-17 18:24:59

Printing Exported Variables

Time of First Successful Submission: 2026-04-17 18:27:46

Storing Command Output

Time of First Successful Submission: 2026-04-17 18:29:41

Reading Input

Time of First Successful Submission: 2026-04-17 20:04:52

Reading Files

Time of First Successful Submission: 2026-04-17 20:07:46

Translating characters

Time of First Successful Submission: 2026-04-17 20:25:16

Deleting characters

Time of First Successful Submission: 2026-04-17 20:27:07

Deleting newlines

Time of First Successful Submission: 2026-04-17 20:29:29

Extracting the first lines with head

Time of First Successful Submission: 2026-04-17 20:31:06

Extracting specific sections of text

Time of First Successful Submission: 2026-04-17 20:34:27

Sorting data

Time of First Successful Submission: 2026-04-17 20:35:59

Listing Processes

Time of First Successful Submission: 2026-04-17 22:47:08

Killing Processes

Time of First Successful Submission: 2026-04-17 22:54:05

Interrupting Processes

Time of First Successful Submission: 2026-04-17 22:57:37

Killing Misbehaving Processes

Time of First Successful Submission: 2026-04-17 23:03:10

Suspending Processes

Time of First Successful Submission: 2026-04-17 23:05:11

Resuming Processes

Time of First Successful Submission: 2026-04-17 23:11:27

Backgrounding Processes

Time of First Successful Submission: 2026-04-17 23:14:05

Foregrounding Processes

Time of First Successful Submission: 2026-04-17 23:14:52

Starting Backgrounded Processes

Time of First Successful Submission: 2026-04-17 23:16:08

Process Exit Codes

Time of First Successful Submission: 2026-04-17 23:17:42

Becoming root with su

Time of First Successful Submission: 2026-04-18 00:32:21

Other users with su

Time of First Successful Submission: 2026-04-18 00:33:58

Cracking passwords

Time of First Successful Submission: 2026-04-18 00:40:12

Using sudo

Time of First Successful Submission: 2026-04-18 00:43:41

Changing File Ownership

Time of First Successful Submission: 2026-04-19 03:35:49

Groups and Files

Time of First Successful Submission: 2026-04-19 03:42:38

Fun With Groups Names

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

Changing Permissions

Time of First Successful Submission: 2026-04-19 03:48:22

Executable Files

Time of First Successful Submission: 2026-04-19 03:49:59

Permission Tweaking Practice

Time of First Successful Submission: 2026-04-19 03:56:04

Permissions Setting Practice

Time of First Successful Submission: 2026-04-19 04:02:46

The SUID Bit

Time of First Successful Submission: 2026-04-19 04:08:34

Chaining with Semicolons

Time of First Successful Submission: 2026-04-20 02:07:57

Building on Success

Time of First Successful Submission: 2026-04-20 02:11:14

Handling Failure

Time of First Successful Submission: 2026-04-20 02:13:39

Your First Shell Script

Time of First Successful Submission: 2026-04-20 02:16:56

Redirecting Script Output

Time of First Successful Submission: 2026-04-20 02:28:01

Executable Shell Scripts

Time of First Successful Submission: 2026-04-20 02:30:15

Understanding Shebangs

Time of First Successful Submission: 2026-04-20 02:34:05

Scripting with Arguments

Time of First Successful Submission: 2026-04-20 02:37:24

Scripting with Conditionals

Time of First Successful Submission: 2026-04-20 02:40:24

Scripting with Default Cases

Time of First Successful Submission: 2026-04-20 02:41:58

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-04-20 02:44:52

Reading Shell Scripts

Time of First Successful Submission: 2026-04-20 02:46:12

Launching Screen

Time of First Successful Submission: 2026-04-20 02:49:37

Detaching and Attaching

Time of First Successful Submission: 2026-04-20 02:52:39

Finding Sessions

Time of First Successful Submission: 2026-04-20 02:55:12

Switching Windows

Time of First Successful Submission: 2026-04-20 02:57:23

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-04-20 02:59:01

Switching Windows (tmux)

Time of First Successful Submission: 2026-04-20 03:00:40

The PATH Variable

Time of First Successful Submission: 2026-04-20 03:06:02

Setting PATH

Time of First Successful Submission: 2026-04-20 03:07:31

Finding Commands

Time of First Successful Submission: 2026-04-20 03:08:49

Adding Commands

Time of First Successful Submission: 2026-04-20 03:13:33

Hijacking Commands

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

Bashrc Backdoor

Time of First Successful Submission: 2026-04-21 03:23:34

Sniffing Input

Time of First Successful Submission: 2026-04-21 03:30:06

Overshared Directories

Time of First Successful Submission: 2026-04-21 03:38:26

Tricky Linking

Time of First Successful Submission: 2026-04-21 03:50:03

Sniffing Process Arguments

Time of First Successful Submission: 2026-04-21 03:52:19

Snooping on Configurations

Time of First Successful Submission: 2026-04-21 03:54:22

The Fork Bomb

Time of First Successful Submission: 2026-04-21 04:20:09

Disk-Space Doomsday

Time of First Successful Submission: 2026-04-21 04:25:16

rm -rf /

Time of First Successful Submission: 2026-04-21 04:26:45

Life after rm -rf /

Time of First Successful Submission: 2026-04-21 04:33:17

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-04-21 04:35:19


Computing 101

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Your First Register

Time of First Successful Submission: 2026-04-23 02:57:04

Your First Syscall

Time of First Successful Submission: 2026-04-23 03:04:34

Exit Codes

Time of First Successful Submission: 2026-04-23 03:08:10

Building Executables

Time of First Successful Submission: 2026-04-23 03:20:31

Moving Between Registers

Time of First Successful Submission: 2026-04-23 03:25:17

Loading From Memory

Time of First Successful Submission: 2026-04-27 01:48:30

More Loading Practice

Time of First Successful Submission: 2026-04-27 01:52:50

Dereferencing Pointers

Time of First Successful Submission: 2026-04-27 01:59:41

Dereferencing Yourself

Time of First Successful Submission: 2026-04-27 02:04:40

Dereferencing with Offsets

Time of First Successful Submission: 2026-04-27 02:10:43

Stored Addresses

Time of First Successful Submission: 2026-04-27 02:14:36

Double Dereference

Time of First Successful Submission: 2026-04-27 02:18:15

The Stack

Time of First Successful Submission: 2026-04-27 02:32:49

Stack Offsets

Time of First Successful Submission: 2026-04-27 02:37:55

Program Arguments on the Stack

Time of First Successful Submission: 2026-04-27 02:47:04

Popping From the Stack

Time of First Successful Submission: 2026-04-27 02:51:11

Disassembling Programs

Time of First Successful Submission: 2026-04-29 01:01:54

Tracing Syscalls

Time of First Successful Submission: 2026-04-29 01:11:58

Starting GDB

Time of First Successful Submission: 2026-04-29 01:14:54

Quitting GDB

Time of First Successful Submission: 2026-04-29 01:15:23

Starting Programs in GDB

Time of First Successful Submission: 2026-04-29 01:18:09

Disassembling in GDB

Time of First Successful Submission: 2026-04-29 01:19:06

Stepping Through Instructions

Time of First Successful Submission: 2026-04-29 01:21:50

Reading Register Values

Time of First Successful Submission: 2026-04-29 01:23:45

Popping Stack Values

Time of First Successful Submission: 2026-04-29 01:25:15

Examining Memory

Time of First Successful Submission: 2026-04-29 01:27:25

Examining Stack Pointers

Time of First Successful Submission: 2026-04-29 01:33:19

Cooperative Debugging

Time of First Successful Submission: 2026-04-29 01:44:59

Writing Output

Time of First Successful Submission: 2026-04-29 02:23:17

Chaining Syscalls

Time of First Successful Submission: 2026-04-29 02:25:45

Writing Strings

Time of First Successful Submission: 2026-04-29 02:26:58

Reading Data

Time of First Successful Submission: 2026-04-29 02:40:57

Opening Files

Time of First Successful Submission: 2026-04-29 02:48:38

Hardcoding the Filename

Time of First Successful Submission: 2026-04-29 03:01:10

Comparing Values

Time of First Successful Submission: 2026-05-01 04:24:49

Comparing Characters

Time of First Successful Submission: 2026-05-02 01:17:39

Conditional Control Flow

Time of First Successful Submission: 2026-05-02 01:36:51

Comparing Strings

Time of First Successful Submission: 2026-05-02 01:46:41

Reverse the Password

Time of First Successful Submission: 2026-05-02 01:55:58

Conditionals Without Conditionals

Time of First Successful Submission: 2026-05-02 02:20:23

Looping

Time of First Successful Submission: 2026-05-02 02:36:15

Reverse the Calculation

Time of First Successful Submission: 2026-05-02 21:45:53

Reverse the Reverse

Time of First Successful Submission: 2026-05-02 21:51:17

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-05-02 22:05:07

Loops on Data

Time of First Successful Submission: 2026-05-02 22:09:44

set-register

Time of First Successful Submission: 2026-05-03 18:25:31

set-multiple-registers

Time of First Successful Submission: 2026-05-03 18:33:54

add-to-register

Time of First Successful Submission: 2026-05-03 18:46:29

linear-equation-registers

Time of First Successful Submission: 2026-05-03 18:51:55

integer-division

Time of First Successful Submission: 2026-05-03 19:06:46

modulo-operation

Time of First Successful Submission: 2026-05-04 00:38:13

set-upper-byte

Time of First Successful Submission: 2026-05-04 00:47:07

efficient-modulo

Time of First Successful Submission: 2026-05-04 01:06:23

byte-extraction

Time of First Successful Submission: 2026-05-04 01:26:17

bitwise-and

Time of First Successful Submission: 2026-05-04 18:00:46

check-even

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

memory-read

Time of First Successful Submission: 2026-05-04 18:38:07

memory-write

Time of First Successful Submission: 2026-05-04 18:44:58

memory-increment

Time of First Successful Submission: 2026-05-04 19:07:03

byte-access

Time of First Successful Submission: 2026-05-04 19:52:18

memory-size-access

Time of First Successful Submission: 2026-05-04 19:58:56

little-endian-write

Time of First Successful Submission: 2026-05-04 20:12:07

memory-sum

Time of First Successful Submission: 2026-05-04 20:36:30

stack-subtraction

Time of First Successful Submission: 2026-05-04 20:40:38

swap-stack-values

Time of First Successful Submission: 2026-05-04 20:42:00

average-stack-values

Time of First Successful Submission: 2026-05-04 20:47:52

absolute-jump

Time of First Successful Submission: 2026-05-04 23:09:51

relative-jump

Time of First Successful Submission: 2026-05-05 00:56:04

jump-trampoline

Time of First Successful Submission: 2026-05-05 01:09:39

conditional-jump

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

indirect-jump

Time of First Successful Submission: 2026-05-05 16:55:24

average-loop

Time of First Successful Submission: 2026-05-05 17:42:07

count-non-zero

Time of First Successful Submission: 2026-05-05 18:29:50

string-lower

Time of First Successful Submission: 2026-05-05 21:08:38

most-common-byte

Time of First Successful Submission: 2026-05-06 16:48:37

Exit

Time of First Successful Submission: 2026-05-08 19:42:39

Socket

Time of First Successful Submission: 2026-05-10 00:36:59

Bind

Time of First Successful Submission: 2026-05-10 02:22:41

Listen

Time of First Successful Submission: 2026-05-14 16:23:03

Accept

Time of First Successful Submission: 2026-05-14 16:38:08

Static Response

Time of First Successful Submission: 2026-05-14 18:52:32


GCA CTF

12 / 104 2393 / 45962


Using the Terminal

Time of First Successful Submission: 2026-04-15 19:32:27

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-15 19:33:49

Using the GUI Desktop

Time of First Successful Submission: 2026-04-15 19:38:49

Pasting into the Desktop

Time of First Successful Submission: 2026-04-15 19:41:10

Connecting over SSH

Time of First Successful Submission: 2026-04-15 19:44:57

Restarting Challenges

Time of First Successful Submission: 2026-04-15 19:49:12

Getting Help

Time of First Successful Submission: 2026-04-15 19:53:00

Challenge Programs

Time of First Successful Submission: 2026-04-15 19:56:18

The Flag File

Time of First Successful Submission: 2026-04-15 19:57:16

Using Privileged Mode

Time of First Successful Submission: 2026-04-15 20:01:51

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-15 20:04:12

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-15 20:07:03