Linux

• Linux for Beginners
• Basic Commands
• Komodo

Linux for Beginners

Basic Commands

cd

• Usage
  • To change directories
• Examples

cd temp # browses to the directory called temp
cd /usr/bin # browses to /usr/bin folder
cd - # browse to previous directory
cd .. # browse to the parent direcotry
cd ../../ #browse 2 parent directories behind

pwd

• Usage

  • To print current working directory

• Examples

  pwd # simply lists the current folder you are in
  

ls

• Usage

  • To list all the files and directories

• Examples

  ls # lists current directory
  ls -l # list current directory with details
  ls -a # list all the hidden files
  ls -R # list recursively
  

  <p class="callout info">Please note, you can combine a number of the switches in one query rather than running them one by one. e.g. ls -lah</p>

mkdir

• Usage

  • to create a new directory

• Examples

  mkdir directory #create a folder with the name directory
  mkidr -p directory/data #create a folder with a subfolder called data
  

cp

• Usage

  • Copy a file from one place to another

• Examples

  cp hash /temp #copies file into the specified folder
  cp hash hash1 #copies the content of a file into a different one
  cp -r folder1/ folder2/ #copies the folder with it's content into a folder called folder2
  

mv

• Usage

  • To move a file from one place to another, also can be used to rename a file.

• Examples

  mv file1 ../ #moves the file from the current folder to the parent folder
  mv file1 file2 #renames file1 to file2
  

touch

• Usage

  • To create an empty file.

• Examples

  touch file1 #create file 1
  touch hash && echo "some_text" > hash # create a file cat hash and write in the file the words "some_text"
  

cat/tac

• Usage

  • To read the content of a file.

• Examples

  cat hash # read the content of the file called hash
  tac hash # same as above
  

rm

• Usage

  To remove a file or folder.

• Examples

  rm file1 # remove file1
  rm -rf folder1 # recursively remove the content of folder1 and discard any files in use.
  

grep

• Usage

  Search for a line or specific text in a file.

• Examples

  grep "text" file_with_text.txt # Print all lines that have the word "text"
  grep -c "text" file_with_text.txt # Count the number of occurences of the word "text"
  grep -i "text" file_with_text #Print all lines that contain the case insensitive word "text"
  

  
  

  The grep function has a ton of use cases, it can do regex matches, show lines before or after specific text and a lot more. I would advise to read the manual pages for more use cases. See the below URL for more information on the command: GNU Grep 3.7

head

• Usage

  • Read the first n lines of a file.

• Examples

  head file.txt # Default behaviour is to output the first 10 lines of a file
  head -n 3 # Output the first 3 lines of a file

tail

• Usage

  • Read the last n lines of a file

• Examples

  tail file.txt # Default behaviour, output the last 10 lines of a file
  tail -n 3 # Output the last 3 lines of a file

chmod

• Usage

  • To change the permissions of a file or folder

• Examples

  chmod +x file1 # make a specific file executable
  chmod 754 file1 # grant the file read, write, execute to user, read and execute to group and read to other

echo

• Usage

  • To write something in the console or file.

• Examples

  echo "Some really interesting text" #write the test between brackets

clear

• Usage

  • To clear the terminal windows of text.

• Examples

  clear # clears the terminal window

sudo

• Usage

  • To escalate your privileges to super user.

• Examples

  sudo ./script.sh # execute the script as root
  sudo apt install memes # escalate your privileges to install the application called memes

Komodo

https://komo.do - For in-depth information utilise the following

Introduction

Komodo is a lightweight but powerful build and deployment system that cuts through the usual headaches of managing Docker-based projects. At its core, it automates what so many teams end up duct-taping together: auto-versioned Docker image builds directly from your git repos, triggered on push. No fiddling with clunky CI pipelines just to get an image out the door.

Deployment is just as smooth. You can push containers or entire docker-compose setups, check uptime, and view logs across all your servers from one place. Instead of juggling multiple dashboards or SSH sessions, Komodo centralizes the experience.

What I love is that it’s written in Rust, which means the API and agent are ridiculously fast and memory-safe, exactly the kind of foundation you want for something that touches every part of your deployment stack. It feels clean, sturdy, and built to last.

In short: Komodo is a tool that makes deployment less of a chore and more of a background hum - always running, always reliable. It takes care of the boring stuff so you can focus on building.

Basic installation

DO NOT USE THIS FOR PRODUCTION. Make sure to update the required fields before rolling out in your estate.

1. To set up and get you going it’s as simple as:

wget -P komodo <https://raw.githubusercontent.com/moghtech/komodo/main/compose/mongo.compose.yaml> && \
wget -P komodo <https://raw.githubusercontent.com/moghtech/komodo/main/compose/compose.env>

1. Followed by:

docker compose -p komodo -f komodo/mongo.compose.yaml --env-file komodo/compose.env up -d

Updating

docker compose -p komodo -f komodo/mongo.compose.yaml --env-file komodo/compose.env pull
docker compose -p komodo -f komodo/mongo.compose.yaml --env-file komodo/compose.env down
docker compose -p komodo -f komodo/mongo.compose.yaml --env-file komodo/compose.env up -d

Usage

I utilise Komodo to manage all my docker containers that I utilise for various things, such as personal life, website, this knowledge base,  security projects or quickly testing new applications to see if I like them or not.