Thursday, 23 February 2017

How to Install LAMP stack on Ubunt 16.04 VPS

1)Install Apache

-sudo apt-get update
-sudo apt-get install apache2

add a single line to the /etc/apache2/apache2.conf file to suppress a warning message.

-sudo apache2ctl configtest

Open up the main configuration file

-sudo nano /etc/apache2/apache2.conf

at the bottom of the file, add:-

ServerName Domain Name or IP

 check for syntax errors

-sudo apache2ctl configtest

Syntax OK

Restart Apache to implement the changes:

-sudo systemctl restart apache2

see the Apache Full profile:

-sudo ufw app info Apache Full
Profile: Apache Full
Title: Web Server (HTTP,HTTPS)
Description: Apache v2 is the next generation of the omnipresent Apache web


Allow incoming traffic for this profile:

-sudo ufw allow in "Apache Full"

2)Install MySQL

-sudo apt-get install mysql-server

for security, run following command and press other than Y

-sudo mysql_secure_installation
check mysql
-mysql --version

3)Install PHP

-sudo apt-get install php libapache2-mod-php php-mcrypt php-mysql

check php installation

-php --version

-sudo nano /var/www/html/info.php
ctrl+x, then press Y and hit Enter

Go to your browser then type:

domainname/IP address/info.php

How to setup Initial Ubuntu -16.04 server

create new droplet in Digital Ocean.
Log In to your newly created droplet
-ssh root@your_server_ip

Create New User

-adduser zealgeeks

Add new user to sudo group

-usermod -aG sudo zealgeek

switch to new user
-su - zealgeeks

-mkdir ~/.ssh          (create new directory)
-chmod 700 ~/.ssh       (restrict the permission)

-nano ~/.ssh/authorized_keys
Now insert your public key (which should be in your clipboard) by pasting it into the editor.

Hit CTRL-x to exit the file, then y to save the changes that you made, then ENTER to confirm the file name.

-chmod 600 ~/.ssh/authorized_keys

Test user Log in

-ssh zealgeeks@server_IP

Set Up a Basic UFW(uncomplicate)Firewall

-sudo ufw app list

We need to make sure that the firewall allows SSH connections so that we can log back in next time. We can allow these connections by typing:

-sudo ufw allow OpenSSH
Afterwards, we can enable the firewall by typing:

-sudo ufw enable
Type "y" and press ENTER to proceed. You can see that SSH connections are still allowed by typing:

-sudo ufw status
Status: active

To                         Action      From
--                         ------      ----
OpenSSH                    ALLOW       Anywhere
OpenSSH (v6)               ALLOW       Anywhere (v6)

Tuesday, 21 February 2017

How to create SSH Key pair

On your local computer, enter this command into the terminal


 cat ~/.ssh/              (for manually copy and paste ssh key to server)

How change or remove the passphrase,

ssh-keygen -p

How to connect to Droplet

1)create  a new Droplet through the DigitalOcean Control Panel, without adding SSH key to droplet.

2)Get Serve Login credentials at your email from digital ocean.

User name: root


Server IP address

-ssh root@serverIP_address

Monday, 20 February 2017

How to watch an avi file format clip on ubuntu 14.04

You can download and install the Ubuntu Restricted Extras directly from the Ubuntu Software Center which provides support for most video and audio formats (mp3,avi,mpeg,Java Flash, TrueType,Codecs).


sudo add-apt-repository ppa:slgobinath/safeeyes
sudo apt update
sudo apt install safeeyes

Thursday, 19 January 2017

How to Install eclipse on ubuntu 14.04

download eclipse

-tar xf eclipse-jee-mars-R-linux-gtk-x86_64.tar.gz
-cd eclipse

How to Install g++ on ubuntu

sudo apt-get install g++

How to install scala on ubuntu 14.04

download .deb from

1)If you're comfortable with the command line, you can install the downloaded Scala deb with:

sudo dpkg -i scala-2.11.4.deb

2)install GDebi through either the Ubuntu Software Center, or via a terminal with:

sudo apt-get install gdebi

Once GDebi is installed, you can double click scala-2.12.1.deb in your file browser which will open the package installer. Finally, click "Install Package", and your new version of Scala will be installed

you have the following tools:

- scala       Scala interactive interpreter
- scalac      Scala compiler
- fsc         Scala resident compiler
- scaladoc    Scala API documentation generator
- scalap      Scala classfile decoder

How to Install oracle 8 on ubuntu 14.04

sudo apt-add-repository ppa:webupd8team/java

sudo apt-get update

sudo apt-get install oracle-java8-installer

java -version

How to watch an avi file on ubuntu

You can download and install the Ubuntu Restricted Extras directly from the Ubuntu Software Center which provides support for most video and audio formats (mp3,avi,mpeg,Java Flash, TrueType,Codecs).