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Intro to Programming Languages

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Commands

Time of First Successful Submission: 2026-01-05 11:44:45

Command Arguments

Time of First Successful Submission: 2026-01-05 11:45:32

Command History

Time of First Successful Submission: 2026-01-05 11:45:54

The Root Path

Time of First Successful Submission: 2026-01-05 11:47:00

Absolute Paths

Time of First Successful Submission: 2026-01-05 11:47:39

Changing position

Time of First Successful Submission: 2026-01-05 11:48:45

Changing to an Absolute Path

Time of First Successful Submission: 2026-01-05 11:50:56

Relative Paths

Time of First Successful Submission: 2026-01-05 11:52:44

Cat

Time of First Successful Submission: 2026-01-05 13:49:47

Ls

Time of First Successful Submission: 2026-01-05 13:54:21

Ls All

Time of First Successful Submission: 2026-01-05 13:59:15

Find

Time of First Successful Submission: 2026-01-05 14:08:58

Piping Echo

Time of First Successful Submission: 2026-01-05 18:32:11

Piping Stdout

Time of First Successful Submission: 2026-01-05 18:33:10

Piping Stdin

Time of First Successful Submission: 2026-01-05 18:36:10


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-01-05 11:15:35

Using the VSCode Workspace

Time of First Successful Submission: 2024-12-02 13:10:47

Using the GUI Desktop

Time of First Successful Submission: 2026-01-05 11:19:12

Pasting into the Desktop

Time of First Successful Submission: 2026-01-05 11:20:26

Restarting Challenges

Time of First Successful Submission: 2026-01-05 11:23:39

Challenge Programs

Time of First Successful Submission: 2026-01-05 11:26:40

The Flag File

Time of First Successful Submission: 2026-01-05 11:27:52

Using Privileged Mode

Time of First Successful Submission: 2026-01-05 11:29:02

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-05 11:30:33

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-05 11:31:16


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2026-01-05 11:44:45

Intro to Arguments

Time of First Successful Submission: 2026-01-05 11:45:32

Command History

Time of First Successful Submission: 2026-01-05 11:45:54

The Root

Time of First Successful Submission: 2026-01-05 11:47:00

Program and absolute paths

Time of First Successful Submission: 2026-01-05 11:47:39

Position thy self

Time of First Successful Submission: 2026-01-05 11:48:45

Position elsewhere

Time of First Successful Submission: 2026-01-05 11:50:56

implicit relative paths, from /

Time of First Successful Submission: 2026-01-05 11:52:44

explicit relative paths, from /

Time of First Successful Submission: 2026-01-05 11:53:52

implicit relative path

Time of First Successful Submission: 2026-01-05 11:54:38

home sweet home

Time of First Successful Submission: 2026-01-05 11:56:12

cat: not the pet, but the command!

Time of First Successful Submission: 2026-01-05 13:49:47

catting absolute paths

Time of First Successful Submission: 2026-01-05 13:50:25

more catting practice

Time of First Successful Submission: 2026-01-05 13:51:18

grepping for a needle in a haystack

Time of First Successful Submission: 2026-01-05 13:52:33

comparing files

Time of First Successful Submission: 2026-01-05 13:53:21

listing files

Time of First Successful Submission: 2026-01-05 13:54:21

touching files

Time of First Successful Submission: 2026-01-05 13:55:23

removing files

Time of First Successful Submission: 2026-01-05 13:56:17

moving files

Time of First Successful Submission: 2026-01-05 13:57:27

copying files

Time of First Successful Submission: 2026-01-05 13:58:41

hidden files

Time of First Successful Submission: 2026-01-05 13:59:15

An Epic Filesystem Quest

Time of First Successful Submission: 2026-01-05 14:04:59

making directories

Time of First Successful Submission: 2026-01-05 14:06:27

finding files

Time of First Successful Submission: 2026-01-05 14:08:58

linking files

Time of First Successful Submission: 2026-01-05 14:10:55

Learning From Documentation

Time of First Successful Submission: 2026-01-05 14:32:19

Learning Complex Usage

Time of First Successful Submission: 2026-01-05 14:33:29

Reading Manuals

Time of First Successful Submission: 2026-01-05 14:36:01

Searching Manuals

Time of First Successful Submission: 2026-01-05 15:18:04

Searching For Manuals

Time of First Successful Submission: 2026-01-05 15:21:41

Helpful Programs

Time of First Successful Submission: 2026-01-05 15:24:29

Help for Builtins

Time of First Successful Submission: 2026-01-05 15:39:45

Matching with *

Time of First Successful Submission: 2026-01-05 15:43:58

Matching with ?

Time of First Successful Submission: 2026-01-05 15:46:38

Matching with []

Time of First Successful Submission: 2026-01-05 15:48:10

Matching paths with []

Time of First Successful Submission: 2026-01-05 15:48:57

Multiple globs

Time of First Successful Submission: 2026-01-05 15:51:36

Mixing globs

Time of First Successful Submission: 2026-01-05 16:19:34

Exclusionary globbing

Time of First Successful Submission: 2026-01-05 16:21:08

Tab completion

Time of First Successful Submission: 2026-01-05 16:22:13

Multiple options for tab completion

Time of First Successful Submission: 2026-01-05 16:23:37

Tab completion on commands

Time of First Successful Submission: 2026-01-05 16:24:11

Redirecting output

Time of First Successful Submission: 2026-01-05 18:32:11

Redirecting more output

Time of First Successful Submission: 2026-01-05 18:33:10

Appending output

Time of First Successful Submission: 2026-01-05 18:34:12

Redirecting errors

Time of First Successful Submission: 2026-01-05 18:35:08

Redirecting input

Time of First Successful Submission: 2026-01-05 18:36:10

Grepping stored results

Time of First Successful Submission: 2026-01-05 18:37:11

Grepping live output

Time of First Successful Submission: 2026-01-05 18:37:58

Grepping errors

Time of First Successful Submission: 2026-01-05 18:38:47

Filtering with grep -v

Time of First Successful Submission: 2026-01-05 18:39:50

Filtering with sed

Time of First Successful Submission: 2026-01-05 18:40:56

Duplicating piped data with tee

Time of First Successful Submission: 2026-01-05 18:49:50

Process substitution for input

Time of First Successful Submission: 2026-01-05 18:51:39

Writing to multiple programs

Time of First Successful Submission: 2026-01-05 18:56:30

Split-piping stderr and stdout

Time of First Successful Submission: 2026-01-05 18:58:42

Named pipes

Time of First Successful Submission: 2026-01-05 19:00:58

Printing Variables

Time of First Successful Submission: 2026-01-05 19:06:22

Setting Variables

Time of First Successful Submission: 2026-01-05 19:06:55

Multi-word Variables

Time of First Successful Submission: 2026-01-05 19:07:25

Exporting Variables

Time of First Successful Submission: 2026-01-05 19:11:09

Printing Exported Variables

Time of First Successful Submission: 2026-01-05 19:11:45

Storing Command Output

Time of First Successful Submission: 2026-01-05 19:12:21

Reading Input

Time of First Successful Submission: 2026-01-05 19:13:07

Reading Files

Time of First Successful Submission: 2026-01-05 19:14:07

Translating characters

Time of First Successful Submission: 2026-01-05 19:19:31

Deleting characters

Time of First Successful Submission: 2026-01-05 19:20:34

Deleting newlines

Time of First Successful Submission: 2026-01-05 19:21:20

Extracting the first lines with head

Time of First Successful Submission: 2026-01-05 19:22:23

Extracting specific sections of text

Time of First Successful Submission: 2026-01-05 19:23:55

Sorting data

Time of First Successful Submission: 2026-01-05 19:24:53

Listing Processes

Time of First Successful Submission: 2026-01-05 19:49:05

Killing Processes

Time of First Successful Submission: 2026-01-05 19:50:36

Interrupting Processes

Time of First Successful Submission: 2026-01-05 19:52:09

Killing Misbehaving Processes

Time of First Successful Submission: 2026-01-05 19:54:20

Suspending Processes

Time of First Successful Submission: 2026-01-05 19:55:28

Resuming Processes

Time of First Successful Submission: 2026-01-05 19:56:03

Backgrounding Processes

Time of First Successful Submission: 2026-01-05 19:57:35

Foregrounding Processes

Time of First Successful Submission: 2026-01-05 19:58:49

Starting Backgrounded Processes

Time of First Successful Submission: 2026-01-05 19:59:35

Process Exit Codes

Time of First Successful Submission: 2026-01-05 20:00:24

Becoming root with su

Time of First Successful Submission: 2026-01-05 12:01:32

Other users with su

Time of First Successful Submission: 2026-01-05 12:02:29

Cracking passwords

Time of First Successful Submission: 2026-01-05 12:04:29

Using sudo

Time of First Successful Submission: 2026-01-05 12:05:07

Changing File Ownership

Time of First Successful Submission: 2026-01-05 20:02:00

Groups and Files

Time of First Successful Submission: 2026-01-05 20:03:10

Fun With Groups Names

Time of First Successful Submission: 2026-01-05 20:04:41

Changing Permissions

Time of First Successful Submission: 2026-01-05 20:05:46

Executable Files

Time of First Successful Submission: 2026-01-05 20:06:25

Permission Tweaking Practice

Time of First Successful Submission: 2026-01-05 20:09:54

Permissions Setting Practice

Time of First Successful Submission: 2026-01-05 20:13:34

The SUID Bit

Time of First Successful Submission: 2026-01-05 20:14:38

Chaining with Semicolons

Time of First Successful Submission: 2026-01-05 20:15:59

Building on Success

Time of First Successful Submission: 2026-01-05 20:16:30

Handling Failure

Time of First Successful Submission: 2026-01-05 20:16:59

Your First Shell Script

Time of First Successful Submission: 2026-01-05 20:18:03

Redirecting Script Output

Time of First Successful Submission: 2026-01-05 20:19:23

Executable Shell Scripts

Time of First Successful Submission: 2026-01-05 20:20:06

Understanding Shebangs

Time of First Successful Submission: 2026-01-05 20:21:20

Scripting with Arguments

Time of First Successful Submission: 2026-01-05 20:22:34

Scripting with Conditionals

Time of First Successful Submission: 2026-01-05 20:23:39

Scripting with Default Cases

Time of First Successful Submission: 2026-01-05 20:24:37

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-01-05 20:27:02

Reading Shell Scripts

Time of First Successful Submission: 2026-01-05 20:27:43

Launching Screen

Time of First Successful Submission: 2026-01-05 20:28:47

Detaching and Attaching

Time of First Successful Submission: 2026-01-05 20:29:42

Finding Sessions

Time of First Successful Submission: 2026-01-05 20:30:58

Switching Windows

Time of First Successful Submission: 2026-01-05 20:31:52

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-01-05 20:32:47

Switching Windows (tmux)

Time of First Successful Submission: 2026-01-05 20:33:35

The PATH Variable

Time of First Successful Submission: 2026-01-05 16:34:29

Setting PATH

Time of First Successful Submission: 2026-01-05 16:35:05

Finding Commands

Time of First Successful Submission: 2026-01-05 16:36:26

Adding Commands

Time of First Successful Submission: 2026-01-05 16:38:51

Hijacking Commands

Time of First Successful Submission: 2026-01-05 16:41:14

Bashrc Backdoor

Time of First Successful Submission: 2026-01-05 20:36:53

Sniffing Input

Time of First Successful Submission: 2026-01-05 20:41:53

Overshared Directories

Time of First Successful Submission: 2026-01-05 20:47:07

Tricky Linking

Time of First Successful Submission: 2026-01-05 20:57:25

Sniffing Process Arguments

Time of First Successful Submission: 2026-01-05 20:58:49

Snooping on Configurations

Time of First Successful Submission: 2026-01-05 20:59:57

The Fork Bomb

Time of First Successful Submission: 2026-01-05 19:29:38

Disk-Space Doomsday

Time of First Successful Submission: 2026-01-05 19:32:43

rm -rf /

Time of First Successful Submission: 2026-01-05 19:35:52

Life after rm -rf /

Time of First Successful Submission: 2026-01-05 19:39:53

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-01-05 19:43:24


Computing 101

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Your First Register

Time of First Successful Submission: 2026-01-06 09:22:18

Your First Syscall

Time of First Successful Submission: 2026-01-06 09:22:46

Exit Codes

Time of First Successful Submission: 2026-01-06 09:23:54

Building Executables

Time of First Successful Submission: 2026-01-06 09:25:48

Moving Between Registers

Time of First Successful Submission: 2026-01-06 09:27:09

Tracing Syscalls

Time of First Successful Submission: 2026-01-06 09:28:39

Starting GDB

Time of First Successful Submission: 2026-01-06 09:29:33

Starting Programs in GDB

Time of First Successful Submission: 2026-01-06 09:30:15

Loading From Memory

Time of First Successful Submission: 2026-01-06 09:33:15

More Loading Practice

Time of First Successful Submission: 2026-01-06 10:05:23

Dereferencing Pointers

Time of First Successful Submission: 2026-01-06 10:44:04

Dereferencing Yourself

Time of First Successful Submission: 2026-01-06 10:45:14

Dereferencing with Offsets

Time of First Successful Submission: 2026-01-06 10:46:16

Stored Addresses

Time of First Successful Submission: 2026-01-06 10:48:51

Double Dereference

Time of First Successful Submission: 2026-01-06 10:50:45

Triple Dereference

Time of First Successful Submission: 2026-01-06 10:51:31

Writing Output

Time of First Successful Submission: 2026-01-06 10:58:17

Chaining Syscalls

Time of First Successful Submission: 2026-01-06 10:59:07

Writing Strings

Time of First Successful Submission: 2026-01-06 10:59:59

Reading Data

Time of First Successful Submission: 2026-01-06 11:01:39

set-register

Time of First Successful Submission: 2026-01-06 17:48:33

set-multiple-registers

Time of First Successful Submission: 2026-01-06 17:49:16

add-to-register

Time of First Successful Submission: 2026-01-06 17:50:10

linear-equation-registers

Time of First Successful Submission: 2026-01-06 17:52:02

integer-division

Time of First Successful Submission: 2026-01-06 17:55:10

modulo-operation

Time of First Successful Submission: 2026-01-06 17:56:47

set-upper-byte

Time of First Successful Submission: 2026-01-06 17:58:48

efficient-modulo

Time of First Successful Submission: 2026-01-06 18:26:18

byte-extraction

Time of First Successful Submission: 2026-01-06 18:33:24

bitwise-and

Time of First Successful Submission: 2026-01-06 18:35:00

check-even

Time of First Successful Submission: 2026-01-06 18:40:46

memory-read

Time of First Successful Submission: 2026-01-06 18:41:50

memory-write

Time of First Successful Submission: 2026-01-06 18:42:43

memory-increment

Time of First Successful Submission: 2026-01-06 18:45:08

byte-access

Time of First Successful Submission: 2026-01-06 18:46:10

memory-size-access

Time of First Successful Submission: 2026-01-06 18:47:54

little-endian-write

Time of First Successful Submission: 2026-01-06 18:51:33

memory-sum

Time of First Successful Submission: 2026-01-06 18:55:19

stack-subtraction

Time of First Successful Submission: 2026-01-06 18:57:24

swap-stack-values

Time of First Successful Submission: 2026-01-06 18:58:28

average-stack-values

Time of First Successful Submission: 2026-01-06 19:02:55

absolute-jump

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

relative-jump

Time of First Successful Submission: 2026-01-06 19:06:18

jump-trampoline

Time of First Successful Submission: 2026-01-06 19:08:21

conditional-jump

Time of First Successful Submission: 2026-01-06 19:17:10

indirect-jump

Time of First Successful Submission: 2026-01-06 19:21:26

average-loop

Time of First Successful Submission: 2026-01-06 19:30:12

count-non-zero

Time of First Successful Submission: 2026-01-06 19:37:37

string-lower

Time of First Successful Submission: 2026-01-07 13:27:58

most-common-byte

Time of First Successful Submission: 2026-01-07 13:56:06

Debugging Programs

Time of First Successful Submission: 2026-01-07 13:59:14

Inspecting Registers

Time of First Successful Submission: 2026-01-07 14:00:47

Examining Memory

Time of First Successful Submission: 2026-01-07 14:04:40

Setting Breakpoints

Time of First Successful Submission: 2026-01-07 14:05:43

GDB Scripting

Time of First Successful Submission: 2026-01-07 14:06:38

Modifying Data

Time of First Successful Submission: 2026-01-07 14:07:27

Modifying Execution

Time of First Successful Submission: 2026-01-07 14:08:21

Broken Functions

Time of First Successful Submission: 2026-01-07 14:11:38

Exit

Time of First Successful Submission: 2026-01-07 14:14:50

Socket

Time of First Successful Submission: 2026-01-07 14:22:33

Bind

Time of First Successful Submission: 2026-01-07 14:36:40

Listen

Time of First Successful Submission: 2026-01-07 14:42:07

Accept

Time of First Successful Submission: 2026-01-07 16:38:55

Static Response

Time of First Successful Submission: 2026-01-07 20:44:50

Dynamic Response

Time of First Successful Submission: 2026-01-07 21:09:19

Iterative GET Server

Time of First Successful Submission: 2026-01-07 21:10:38

Concurrent GET Server

Time of First Successful Submission: 2026-01-07 21:42:24

Concurrent POST Server

Time of First Successful Submission: 2026-01-07 23:03:13

Web Server

Time of First Successful Submission: 2026-01-07 23:13:37


Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-01-08 10:51:45

... and again!

Time of First Successful Submission: 2026-01-08 10:52:32

Newline Troubles

Time of First Successful Submission: 2026-01-08 10:53:22

Reasoning about files

Time of First Successful Submission: 2026-01-08 10:54:25

Specifying Filenames

Time of First Successful Submission: 2026-01-08 10:55:27

Binary and Hex Encoding

Time of First Successful Submission: 2026-01-08 10:56:45

More Hex

Time of First Successful Submission: 2026-01-08 10:57:23

Decoding Hex

Time of First Successful Submission: 2026-01-08 10:58:13

Decoding Practice

Time of First Successful Submission: 2026-01-08 11:00:15

Encoding Practice

Time of First Successful Submission: 2026-01-08 11:03:16

Hex-encoding ASCII

Time of First Successful Submission: 2026-01-08 11:04:39

Nested Encoding

Time of First Successful Submission: 2026-01-08 11:05:57

Hex-encoding UTF-8

Time of First Successful Submission: 2026-01-08 11:07:28

UTF Mixups

Time of First Successful Submission: 2026-01-08 11:09:21

Modifying Encoded Data

Time of First Successful Submission: 2026-01-08 11:11:38

Decoding Base64

Time of First Successful Submission: 2026-01-08 11:12:59

Encoding Base64

Time of First Successful Submission: 2026-01-08 11:13:53

Dealing with Obfuscation

Time of First Successful Submission: 2026-01-08 11:15:30

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-01-08 11:19:32

Your First HTTP Request

Time of First Successful Submission: 2026-01-08 16:32:52

Reading Flask

Time of First Successful Submission: 2026-01-08 16:37:33

Commented Data

Time of First Successful Submission: 2026-01-08 16:41:06

HTTP Metadata

Time of First Successful Submission: 2026-01-08 22:35:08

HTTP (netcat)

Time of First Successful Submission: 2026-01-08 22:39:00

HTTP Paths (netcat)

Time of First Successful Submission: 2026-01-08 22:40:20

HTTP (curl)

Time of First Successful Submission: 2026-01-08 22:41:38

HTTP (python)

Time of First Successful Submission: 2026-01-08 22:43:31

HTTP Host Header (python)

Time of First Successful Submission: 2026-01-08 22:54:08

HTTP Host Header (curl)

Time of First Successful Submission: 2026-01-08 22:58:14

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-01-08 22:59:52

URL Encoding (netcat)

Time of First Successful Submission: 2026-01-08 23:06:07

HTTP GET Parameters

Time of First Successful Submission: 2026-01-08 23:10:29

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-01-08 23:12:41

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-01-08 23:15:50

HTTP Forms

Time of First Successful Submission: 2026-01-08 23:38:33

HTTP Forms (curl)

Time of First Successful Submission: 2026-01-08 23:42:58

HTTP Forms (netcat)

Time of First Successful Submission: 2026-01-08 23:50:44

HTTP Forms (python)

Time of First Successful Submission: 2026-01-09 00:03:15

HTTP Forms Without Forms

Time of First Successful Submission: 2026-01-09 00:05:55

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-01-09 00:15:16

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-01-09 00:18:33

wget

Time of First Successful Submission: 2026-01-08 23:32:39


CybHer Dojo

12 / 104 794 / 37361


Using the Terminal

Time of First Successful Submission: 2026-01-05 11:15:35

Using the VSCode Workspace

Time of First Successful Submission: 2024-12-02 13:10:47

Using the GUI Desktop

Time of First Successful Submission: 2026-01-05 11:19:12

Pasting into the Desktop

Time of First Successful Submission: 2026-01-05 11:20:26

Connecting over SSH

Time of First Successful Submission: 2026-01-05 11:21:37

Restarting Challenges

Time of First Successful Submission: 2026-01-05 11:23:39

Getting Help

Time of First Successful Submission: 2026-01-05 11:25:48

Challenge Programs

Time of First Successful Submission: 2026-01-05 11:26:40

The Flag File

Time of First Successful Submission: 2026-01-05 11:27:52

Using Privileged Mode

Time of First Successful Submission: 2026-01-05 11:29:02

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-05 11:30:33

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-05 11:31:16


GCA CTF

12 / 104 794 / 37361


Using the Terminal

Time of First Successful Submission: 2026-01-05 11:15:35

Using the VSCode Workspace

Time of First Successful Submission: 2024-12-02 13:10:47

Using the GUI Desktop

Time of First Successful Submission: 2026-01-05 11:19:12

Pasting into the Desktop

Time of First Successful Submission: 2026-01-05 11:20:26

Connecting over SSH

Time of First Successful Submission: 2026-01-05 11:21:37

Restarting Challenges

Time of First Successful Submission: 2026-01-05 11:23:39

Getting Help

Time of First Successful Submission: 2026-01-05 11:25:48

Challenge Programs

Time of First Successful Submission: 2026-01-05 11:26:40

The Flag File

Time of First Successful Submission: 2026-01-05 11:27:52

Using Privileged Mode

Time of First Successful Submission: 2026-01-05 11:29:02

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-05 11:30:33

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-05 11:31:16