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To set environment to manage a remote host

eval "$(docker-machine env dev)"

In which dev must be already registered in docker-machine. Says IP address of dev machine is 192.168.99.101, and API is exposed on port 2376, then the command above is equivalent to following commands:

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## Install Docker Engine (need sudo)
wget -qO- https://get.docker.com/ | sh

sudo usermod -aG docker <username>

## Install Docker Compose
curl -L https://github.com/docker/compose/releases/download/1.6.2/docker-compose-`uname -s`-`uname -m` > docker-compose
sudo mv docker-compose /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

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#!/bin/sh

### BEGIN INIT INFO
# Provides:	  nginx
# Required-Start:    $local_fs $remote_fs $network $syslog $named
# Required-Stop:     $local_fs $remote_fs $network $syslog $named
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts the nginx web server
# Description:       starts nginx using start-stop-daemon

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## For example: ssh-keygen -H -F google.com
ssh-keygen -H -F <hostname>

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In this guide, you will learn how to change the default docker bridge network's subnet to 10.11.12.0/24 on Ubuntu

Docker-engine's default options

Docker creates a bridge called docker0 with a default ip address of 172.17.0.1.

On Ubuntu the configuration file is located at:

/etc/default/docker

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## Remove all stopped containers
docker rm $(docker ps -a -q)

## Remove images with <none> tag
docker rmi $(docker images | grep "^<none>" | awk "{print $3}")

## Stats of all containers
docker stats $(docker ps | awk '{if(NR>1) print $NF}')

## Allow a user to use docker

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## Add openjdk PPA
sudo add-apt-repository ppa:openjdk-r/ppa

## Update the repo
sudo apt-get update

## Install openjdk-8-jdk
sudo apt-get install openjdk-8-jdk

## Set the default Java

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ALTER TABLE `{some_table}` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

ALTER TABLE `{some_table}` CHANGE COLUMN `{some_column}` `{some_column}` varchar(500) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL;

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sudo service mysql stop  #or mysqld
sudo killall -9 mysql
sudo killall -9 mysqld
sudo apt-get remove --purge mysql-server mysql-client mysql-common
sudo apt-get autoremove
sudo apt-get autoclean
sudo deluser mysql
sudo rm -rf /var/lib/mysql
sudo apt-get purge mysql-server-core-5.5
sudo apt-get purge mysql-client-core-5.5

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import java.util.Random;

public class HelloWorld {
     public static void main(String[] args) {
        System.out.println(randomString(-229985452) + " " + randomString(-147909649));
     }
     
    public static String randomString(int i) {
        Random ran = new Random(i);
        StringBuilder sb = new StringBuilder();