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Advanced Linux Commands

Advanced Commands​

Vim cheat-sheet:​

https://devhints.io/vim

Docker CLI cheat-sheet:​

https://docs.docker.com/get-started/docker_cheatsheet.pdf

https://devhints.io/docker

Docker compose cheat-sheet:​

https://devhints.io/docker-compose

Clone repo from github​

git clone https://github-link-here

Expanding Disk Partition​

sudo growpart /dev/sda 3
pvdisplay
lvdisplay
pvresize /dev/sda3
lvextend -l+100%FREE /dev/ubuntu-vg/ubuntu-lv
resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv

Checking Listening Ports​

lsof -i -P -n | grep LISTEN

Restarting Networking on Ubuntu​

ip link set ens160 down
ip link set ens160 up

Installing Docker​

curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh

Installing Docker Compose​

sudo curl -L "https://github.com/docker/compose/releases/download/2.32.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker compose --version

Example Docker Compose File for Observium​

# Docker compose file for Observium
# Maintained by somsakc@hotmail.com

version: '3'

services:
  db:
    image: mariadb:10.6.4
    environment:
      - MYSQL_ROOT_PASSWORD=passw0rd
      - MYSQL_USER=observium
      - MYSQL_PASSWORD=passw0rd
      - MYSQL_DATABASE=observium
      - TZ=Asia/Bangkok
    volumes:
      - ./data:/var/lib/mysql
    networks:
      - back-tier
    restart: always

  app:
    image: mbixtech/observium:latest
    environment:
      - OBSERVIUM_ADMIN_USER=admin
      - OBSERVIUM_ADMIN_PASS=passw0rd
      - OBSERVIUM_DB_HOST=db
      - OBSERVIUM_DB_NAME=observium
      - OBSERVIUM_DB_USER=observium
      - OBSERVIUM_DB_PASS=passw0rd
      - OBSERVIUM_BASE_URL=http://192.168.135.251:8889  # Change IP here, ifconfig command
      - TZ=Asia/Bangkok
    volumes:
      - ./logs:/opt/observium/logs
      - ./rrd:/opt/observium/rrd
    networks:
      - back-tier
    ports:
      - "8889:80"
    restart: always
    depends_on:
      - db

networks:
  back-tier:
      driver: bridge