Ubuntu install puppeteer

Installing puppeteer into a fresh AWS EC2 Ubuntu 18.04 and its dependencies.

sudo apt update
sudo apt upgrade
sudo apt install npm
npm i puppeteer

Now run a simple puppeteer script and you will encounter errors about missing shared libraries. A simple script below, lets name it simple.js

const puppeteer = require('puppeteer');
async function run () {
   const browser = await puppeteer.launch({
      defaultViewport: {width: 1920, height: 1080}
   });
   const page = await browser.newPage();
   await page.goto('https://www.google.com/search?q=bitcoin');
   await page.screenshot({path: 'screenshot.png'});
   browser.close();
}
run(); 
node simple.js

Now install the dependencies and rerun.

sudo apt install libx11-xcb1 libxcomposite1 libxcursor1 libxdamage1 libxi-dev libxtst-dev libnss3 libcups2 libxss1 libxrandr2 libasound2 libatk1.0-0 libatk-bridge2.0-0 libpangocairo-1.0-0 libgtk-3-0

Ubuntu install squid

Setting up undetectable proxy in a fresh new Ubuntu 18.04 in AWS EC2

sudo apt update
sudo apt upgrade
sudo apt install squid

Edit the configuration file at /etc/squid/squid.conf . Change the settings to the following below

http_access allow all
forwarded_for delete
via off
request_header_access Cache-Control deny all 

I set http_access to allow all because I’m using AWS security group to white list IP and port to my proxy server. After making changes to the settings, restart squid.

sudo systemctl restart squid

Ubuntu install golang

As usual, before installing anything in Ubuntu, run

sudo apt update
sudo apt upgrade

Once done, you can start installing golang. The easiest method to install using the below command.

sudo apt install golang-go

Next is to test if you had successfully install golang. Create a hello.go file, paste the contents below into the hello.go file and save it.

package main

import "fmt"

func main() {
    fmt.Println("hello world")
}

To execute the file, run the command below.

go run hello.go

Ubuntu install sysstat

Ubuntu install sysstat

sudo apt install sysstat

Once installation completed, enable sysstat by setting the value to true.

sudo vim /etc/default/sysstat

ubuntu-install-sysstat-01

After that restart the sysstat service

sudo service sysstat restart

By default sysstat sample the CPU usage every 10 minutes at 5, 15, 25, 35, 45 and 55 minutes of the hour. To modify it,

sudo vim /etc/cron.d/sysstat

ubuntu-install-sysstat-02

Viewing the stats

To view latest stats

sar

To view yesterday’s stats

sar -f /var/log/sysstat/sa$(date +%d -d 'yesterday')

To view specific date stats

sar -f /var/log/sysstat/sa$(date +%d -d '2019-04-27')

 

Dynamic IP using Cloudflare

Dynamic IP using Cloudflare

I previously posted an article about updating your DNS with your dynamic IP using paid service noip.com. I recently found out that you can do the same for free using Cloudflare.

Assumptions

  1. Registered an account with Cloudflare.
  2. Domain configured and active in Cloudflare. If not, read my post on how to configure one.
  3. Installed curl and jq.

Copy the content below into update.sh.

#!/bin/bash
json='Content-Type: application/json'
email='YOUR_EMAIL_HERE'
api_key='YOUR_GLOBAL_API_KEY_HERE'
zone_id='YOUR_ZONE_ID_HERE'
domain='www1.oofnivek.com'
dns_id=$(curl -X GET "https://api.cloudflare.com/client/v4/zones/$zone_id/dns_records?type=A&name=$domain" -H "X-Auth-Email: $email" -H "X-Auth-Key: $api_key" -H "$json"|jq -r .result[0].id)
#echo -n $dns_id
ip=$(curl checkip.amazonaws.com)
curl -X PUT "https://api.cloudflare.com/client/v4/zones/$zone_id/dns_records/$dns_id" -H "X-Auth-Email: $email" -H "X-Auth-Key: $api_key" -H "$json" \
--data '{"type":"A","name":"'$domain'","content":"'$ip'","ttl":1,"proxied":true}'

dynamic-ip-using-cloudflare
Create a sub domain for you to update dynamically

dynamic-ip-using-cloudflare
This is where you can get your global API key

dynamic-ip-using-cloudflare
Once clicked [View], your API key will be shown

dynamic-ip-using-cloudflare
You can get your Zone ID here

The API I used can be found here

List DNS Records

Update DNS Record

 

Dynamic IP using noip.com

Dynamic IP using noip.com

Assumptions

  1. Ubuntu/Linux machine running at home with dynamic IP.
  2. Ubuntu/Linux machine is configured in DMZ or has port 80 forwarded to it.
  3. Registerd a free account at noip.com.

Bash script below to automatically get your external IP and and update noip.com. After that put this script to run as a cron job.

myip=$(curl checkip.amazonaws.com)
username='oofnivek'
password='password'
hostname='oofnivek.ddns.me'
curl http://$username:$password@dynupdate.no-ip.com/nic/update?hostname=$hostname&myip=$myip

ubuntu-update-dynamic-ip

 

 

 

Ubuntu install Plex media server

Ubuntu install Plex media server

Go to Plex website to get the download URL

ubuntu-install-plex-media-server

cd /tmp
wget https://downloads.plex.tv/plex-media-server/1.14.1.5488-cc260c476/plexmediaserver_1.14.1.5488-cc260c476_amd64.deb
sudo dpkg -i plexmediaserver_1.14.1.5488-cc260c476_amd64.deb
systemctl status plexmediaserver

ubuntu-install-plex-media-server

Go to http://127.0.0.1:32400/web and start configuring your Plex

Assuming that the videos are in your external hard disk connected to your Ubuntu desktop. You’ll need to run these commands to give user plex to access your drive.

MYGROUP="$USER"
sudo usermod -a -G $MYGROUP plex
sudo chown $USER:$MYGROUP /media/$USER
sudo chmod 750 /media/$USER
sudo setfacl -m g:$MYGROUP:rwx /media/$USER
sudo service plexmediaserver restart

to check your group or the group user plex is in

groups
groups plex

 

Ubuntu disable sleep on lid close

Ubuntu disable sleep on lid close

I prefer to install Ubuntu Desktop version instead of Ubuntu Server version because it takes care of all the drivers for my laptop. After the installation I’ll disable the GUI.

The screen will stay on at the login prompt and since it is a laptop, there isn’t a power off for the monitor only. Closing the lid will cause the laptop to sleep.

To prevent it from going to sleep. Do these.

ubuntu-disable-sleep-on-lid-close

Uncomment the 2 lines below and set it to ignore.

ubuntu-disable-sleep-on-lid-close

Lastly restart the service.

sudo service systemd-logind restart