How To Install HAProxy on Ubuntu 18.04 LTS

Install HAProxy on Ubuntu 18

HAProxy is a free HTTP/TCP high availability load balancer and proxy server. It spreads requests among multiple servers to mitigate issues resulting from single server failure. HA Proxy is used by a number of high-profile websites including GitHub, Bitbucket, Stack Overflow, Reddit, Tumblr, Twitter and Tuenti and is used in the OpsWorks product from Amazon Web Services.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation HAProxy on an Ubuntu 18.04 bionic beaver.

Install HAProxy on Ubuntu 18.04 LTS Bionic Beaver

Step 1. First, make sure that all your system packages are up-to-date by running these following apt-get commands in the terminal.

sudo apt update
sudo apt upgrade

Step 2. Network Details.

To install and configure HAProxy load balancer on Ubuntu 18.04 we will consider three system as follows:
Web Server Details:

Server 1: web1.wpcademy.com 192.168.1.104
Server 2: web1.wpcademy.com  192.168.1.105
HAProxy Server:
HAProxy: haproxy 192.168.1.46

Step 3. Installing HAProxy on Ubuntu.

At first we will install HAProxy by executing below commands:

sudo add-apt-repository ppa:vbernat/haproxy-1.7
sudo apt update
sudo apt install haproxy

Step 4. Configuring HAProxy.

Now edit haproxy default configuration file /etc/haproxy/haproxy.cfg and start configuration:

nano /etc/haproxy/haproxy.cfg

At the end of the file we will add folowing information:

<em>frontend Local_Server
bind 192.168.1.46:80
mode http
default_backend webserver</em>

backend webserver
mode http
balance roundrobin
option forwardfor
http-request set-header X-Forwarded-Port %[dst_port]
http-request add-header X-Forwarded-Proto https if { ssl_fc }
option httpchk HEAD / HTTP/1.1rnHost:localhost
server system1.osradar.com 192.168.1.104:80
server system2.osradar.com 192.168.1.105:80

To verify the configuration:

sudo haproxy -c -f /etc/haproxy/haproxy.cfg

If above command return output as “configuration file is valid” then restart HAProxy service:

systemctl restart haproxy

Step 5. Accessing HAProxy.

With the HAProxy configured and running, open your load balancer server’s public IP in a web browser and check that you get connected to your backend correctly. The parameter stats uri in the configuration enables the statistics page at the defined address:

http://192.168.0.46

Congratulation’s! You have successfully installed HAProxy. Thanks for using this tutorial for installing HAProxy load balancer in Ubuntu 18.04 bionic beaver system. For additional help or useful information, we recommend you to check the official HAProxy website.

How To Install TensorFlow on Ubuntu 18.04 LTS

Install TensorFlow on Ubuntu 18

TensorFlow is a free and open source platform for machine learning built by Google. It is used by a number of organizations including Twitter, PayPal, Intel, Lenovo, and Airbus. TensorFlow can be installed system-wide, in a Python virtual environment or as a Docker container using pip.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation TensorFlow on a Ubuntu 18.04 (Bionic Beaver) server.

Install TensorFlow on Ubuntu 18.04 LTS Bionic Beaver

Step 1. First, make sure that all your system packages are up-to-date by running these following apt-get commands in the terminal.

sudo apt update
sudo apt upgrade

Step 2. Installing Python 3 and venv.

Run the commands below to install Python and Python venv:

sudo apt install python3 python3-pip python3-venv

To verify what version of Python is installed, run the commands below:

python3 -V

Step 3. Creating a Virtual Environment.

Now, we create a new directory for the TensorFlow project and navigate into it:

mkdir my_tensorflow
cd my_tensorflow

Once inside the directory, run the following command to create the virtual environment:

python3 -m venv venv

To start using this virtual environment, you need to activate it by running the activate script:

source venv/bin/activate

Step 4. Installing TensorFlow on Ubuntu.

Now that the virtual environment is activated, it’s time to install the TensorFlow package:

pip install --upgrade tensorflow

To verify the installation use the following command which will print the TensorFlow version:

python -c 'import tensorflow as tf; print(tf.__version__)'

Congratulation’s! You have successfully installed TensorFlow. Thanks for using this tutorial for installing TensorFlow on Ubuntu 18.04 systems. For additional help or useful information, we recommend you to check the official TensorFlow website.

How To Install Angular on Ubuntu 18.04 LTS

Install Angular on Ubuntu 18

Redis is a in memory key-value data structure store mainly used as a database, message broker or as a cache. Redis supports wide languages with flexibility and high performance. It supports different data structures like strings, lists, sets, maps, spatial indexes, and bitmaps.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation Angular on an Ubuntu 18.04 bionic beaver.

Install Angular on Ubuntu 18.04 LTS Bionic Beaver

Step 1. First, make sure that all your system packages are up-to-date by running these following apt-get commands in the terminal.

sudo apt update
sudo apt upgrade

Step 2. Installing NodeJs and NPM.

To install Angular on Ubuntu 18.04 we first need to install NodeJs and the Node Package Manager (NPM):

curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
sudo apt-get install -y nodejs

Then install NPM:

sudo npm install npm@latest -g

Step 3. Installing Install Angular on CentOS.

We will now install the Angular CLI using NPM:

npm install -g @angular/cli

The Angular CLI makes use of git to pull down required modules so we need to make sure we have git configured. If you have not configured the git user name and email then run the following commands to do so:

git config --global user.email "[email protected]"
git config --global user.name "ramona"

Step 4. Creating a new Angular Application.

Now that we have Angular installed we can create a basic scaffolding for a new application. We will use our newly installed Angular CLI to accomplish this:

ng new wpcademy

First change into the newly created directory for our application:

cd wpcademy

We can run our application easily using the NPM command:

npm start

You will see a link in the output that tells you how to view your application:
** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **

**AngularLiveDevelopmentServerislisteningonlocalhost:4200,openyourbrowseronhttp://localhost:4200/ **

Congratulation’s! You have successfully installed Angular. Thanks for using this tutorial for installing Angular in Ubuntu 18.04 bionic beaver system. For additional help or useful information, we recommend you to check the official Angular website.

How To Install RainLoop Webmail on Ubuntu 18.04 LTS

Install RainLoop Webmail on Ubuntu 18

RainLoop is a fast and lightweight e-mail client software which supports protocols such as IMAP, SSL, SMTP, etc. RainLoop allows the user to login with multiple e-mail accounts even with different browser tabs. It can also be integrated with Google, Facebook, Twitter, Dropbox, etc.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation RainLoop Webmail on an Ubuntu 18.04 bionic beaver.

Install RainLoop Webmail on Ubuntu 18.04 Bionic Beaver

Step 1. First, make sure that all your system packages are up-to-date by running these following apt-get commands in the terminal.

sudo apt update
sudo apt upgrade

Step 2. Install LAMP (Linux, Apache, MariaDB and PHP) server.

An Ubuntu 18.04 LAMP server is required. If you do not have LAMP installed, you can follow our guide here. Also install all required PHP modules:

apt-get install php7.2 libapache2-mod-php7.2 php7.2-common php7.2-mbstring php7.2-xmlrpc php7.2-soap php7.2-gd php7.2-xml php7.2-intl php7.2-mysql php7.2-cli php7.2-zip php7.2-curl

Step 3. Installing RainLoop Webmail on Ubuntu.

For the purposes of this tutorial, we will install the free and open source community edition. Now Download a Rainloop Webmail package from the terminal using wget command:

wget http://www.rainloop.net/repository/webmail/rainloop-community-latest.zip

Next, let’s create a new directory for our RainLoop webmail installation:

sudo mkdir /var/www/rainloop

To extract the files into this new directory, run the following command:

unzip rainloop-community-latest.zip -d /var/www/rainloop

We will need to change some folders permissions:

cd /var/www/rainloop
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;
chown -R www-data:www-data .

Step 4. Configuring Apache web server for RainLoop Webmail.

Create a new virtual host directive in Apache. For example, create a new Apache configuration file named ‘rainloop.conf’ on your virtual server:

touch /etc/apache2/sites-available/rainloop.conf
ln -s /etc/apache2/sites-available/rainloop.conf /etc/apache2/sites-enabled/rainloop.conf
nano /etc/apache2/sites-available/rainloop.conf

Add the following lines:

ServerName webmail.mydomain.com
DocumentRoot "/var/www/rainloop/"

ErrorLog "/var/log/apache2/rainloop_error_log"
TransferLog "/var/log/apache2/rainloop_access_log"

Options +Indexes +FollowSymLinks +ExecCGI
AllowOverride All
Order deny,allow
Allow from all
Require all granted

Options -Indexes
Deny from all

Save and close the file. Restart the Apache service for the changes to take effect:

sudo a2ensite vtiger.conf
sudo a2enmod rewrite
sudo systemctl restart apache2

Step 5. Accessing RainLoop Webmail.

RainLoop Webmail will be available on HTTP port 80 by default. Open your favorite browser and navigate to http://webmail.mydomain.com/?admin and complete the required the steps to finish the installation. If you are using a firewall, please open port 80 to enable access to the control panel.

The default admin login credentials are:

Username: admin
Password: 12345

Congratulation’s! You have successfully installed RainLoop. Thanks for using this tutorial for installing RainLoop Webmail on your Ubuntu 18.04 system. For additional help or useful information, we recommend you to check the official RainLoop website.

How To Install Redis on Ubuntu 18.04 LTS

Install Redis on Ubuntu 18

Redis is a in memory key-value data structure store mainly used as a database, message broker or as a cache. Redis supports wide languages with flexibility and high performance. It supports different data structures like strings, lists, sets, maps, spatial indexes, and bitmaps.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation Redis on an Ubuntu 18.04 bionic beaver.

Install Redis on Ubuntu 18.04 LTS Bionic Beaver

Step 1. First, make sure that all your system packages are up-to-date by running these following apt-get commands in the terminal.

sudo apt update
sudo apt upgrade

Step 2. Installing Redis on Ubuntu.

The Redis packages are available under the default apt repository. For the installation of Redis on an Ubuntu. Run below command from the terminal to install Redis on your machine:

sudo apt install redis-server

Redis provide php extension to work with php. Here we will cover installation of Redis Extension of php from source compilation and using apt repository. Following command will install and setup redis extension with php:

sudo apt install php-redis

Once the installation is completed, Redis service will start automatically. To check the status of the service enter the following command:

sudo systemctl status redis-server

Step 3. Configure Redis Cache.

To configure Redis as a cache you need to edit the /etc/redis/redis.conf file:

sudo nano /etc/redis/redis.conf
# IF YOU ARE SURE YOU WANT YOUR INSTANCE TO LISTEN TO ALL THE INTERFACES
# JUST COMMENT THE FOLLOWING LINE.
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bind 0.0.0.0 ::1
1
2
3
4

# IF YOU ARE SURE YOU WANT YOUR INSTANCE TO LISTEN TO ALL THE INTERFACES
# JUST COMMENT THE FOLLOWING LINE.
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bind0.0.0.0::1

Restart the Redis service for changes to take effect:
sudo systemctl restart redis-server
1

sudosystemctlrestartredis-server

We will now test the Redis instance with some commands:
$ redis-cli
127.0.0.1:6379&gt; ping
PONG
127.0.0.1:6379&gt; set test "Redis Working!"
OK
127.0.0.1:6379&gt; get test
"Redis Working!"
127.0.0.1:6379&gt; exit

Congratulation’s! You have successfully installed Redis. Thanks for using this tutorial for installing Redis in Ubuntu 18.04 bionic beaver system. For additional help or useful information, we recommend you to check the official Redis website.

How To Install Vtiger CRM on Ubuntu 18.04 LTS

Install Vtiger CRM on Ubuntu 18

Vtiger CRM is a cloud-based Customer Relationship Management (CRM) platform that aids interactions between the company and its customers. It provides an intuitive customer experience and delivers outstanding performance for marketing, sales, and support teams which in return provides better customer retention for the company.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation Vtiger on an Ubuntu 18.04 bionic beaver.

Install Vtiger CRM on Ubuntu 18.04 LTS Bionic Beaver

Step 1. First, make sure that all your system packages are up-to-date by running these following apt-get commands in the terminal.

sudo apt update
sudo apt upgrade

Step 2. Install LAMP (Linux, Apache, MariaDB and PHP) server.

An Ubuntu 18.04 LAMP server is required. If you do not have LAMP installed, you can follow our guide here. Also install all required PHP modules:

apt-get install php7.2 libapache2-mod-php7.2 php7.2-common php7.2-mbstring php7.2-xmlrpc php7.2-soap php7.2-gd php7.2-xml php7.2-intl php7.2-mysql php7.2-cli php7.2-zip php7.2-curl

Step 3. Installing vTiger CRM on Ubuntu.

Now download the latest stable version of Vtiger CRM, At the moment of writing this article it is version 7.1.0:

cd /var/www/
wget https://cfhcable.dl.sourceforge.net/project/vtigercrm/vtiger%20CRM%207.1.0/Core%20Product/vtigercrm7.1.0.tar.gz

After the download has been successfully completed, we can then extract the GZ file using the following command:

tar -xvzf vtigercrm7.1.0.tar.gz

We will need to change some folders permissions:

chown -R www-data:www-data /var/www/vtigercrm/
chmod 755 /var/www/vtigercrm/

Step 4. Configuring MariaDB.

By default, MariaDB is not hardened. You can secure MySQL using the mysql_secure_installation script. you should read and below each steps carefully which will set root password, remove anonymous users, disallow remote root login, and remove the test database and access to secure MariaDB.

mysql_secure_installation

Next we will need to log in to the MariaDB console and create a database for the vTiger. Run the following command:

mysql -u root -p

This will prompt you for a password, so enter your MariaDB root password and hit Enter. Once you are logged in to your database server you need to create a database for vTiger installation:

MariaDB &gt; CREATE DATABASE vtiger;
MariaDB &gt; CREATE USER 'vtiger_user'@'localhost' IDENTIFIED BY 'PaSsWoRd';
MariaDB &gt; GRANT ALL PRIVILEGES ON `vtiger`.* TO 'vtiger_user'@'localhost';
MariaDB &gt; FLUSH PRIVILEGES;
MariaDB &gt; \q

Now, let’s tweak some of your PHP settings so you can later complete the VTiger installation:

nano /etc/php/7.2/apache2/php.ini

Modify the following lines:

max_execution_time = 120
max_input_vars = 2000
memory_limit = 256M
post_max_size = 32M
upload_max_filesize = 64M
file_uploads = On
allow_url_fopen = On
display_errors = On
short_open_tags = Off
log_errors = Off
error_reporting = E_WARNING &amp; ~E_NOTICE &amp; ~E_DEPRECATED &amp; ~E_STRICT

Save and close the file. Restart the apache service for the changes to take effects:

systemctl restart apache2.service

Step 5. Configuring Apache web server for vTiger.

Create a new virtual host directive in Apache. For example, create a new Apache configuration file named ‘vtiger.conf’ on your virtual server:

touch /etc/apache2/sites-available/vtiger.conf
ln -s /etc/apache2/sites-available/vtiger.conf /etc/apache2/sites-enabled/vtiger.conf
nano /etc/apache2/sites-available/vtiger.conf

Add the following lines:

ServerAdmin [email protected]
DocumentRoot /var/www/vtigercrm
ServerName your-domain.com
ServerAlias www.your-domain.com

Options FollowSymLinks
AllowOverride All

ErrorLog /var/log/apache2/your-domain.com-error_log
CustomLog /var/log/apache2/your-domain.com-access_log common

Save and close the file. Restart the Apache service for the changes to take effect:

sudo a2ensite vtiger.conf
sudo a2enmod rewrite
sudo phpenmod mbstring
sudo a2enmod headers
sudo systemctl restart apache2

Step 5. Accessing Vtiger CRM.

Vtiger CRM will be available on HTTP port 80 by default. Open your favorite browser and navigate to http://yourdomain.com/vtigercrm or http://server-ip/vtigercrm and complete the required the steps to finish the installation. If you are using a firewall, please open port 80 to enable access to the control panel.

Congratulation’s! You have successfully installed vTiger. Thanks for using this tutorial for installing vTiger Customer Relationship Management on your Ubuntu 18.04 system. For additional help or useful information, we recommend you to check the official vTiger website.

How to Install Linux Kernel 5.0 on Ubuntu 18.04 LTS

Install Linux Kernel 5.0 on Ubuntu 18

Linus Torvalds the creator and the principal developer of the Linux kernel announced the release of Linux kernel version 5.0. This release increases the major kernel version number to 5. from 4.x. The new change does not mean anything and does not affect programs in any way.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation Linux Kernel 5.0 on an Ubuntu 18.04 bionic beaver.

Install Linux Kernel 5.0 on Ubuntu 18.04 LTS Bionic Beaver

Step 1. First, make sure that all your system packages are up-to-date by running these following apt-get commands in the terminal.

sudo apt update
sudo apt upgrade

Step 2. Installing Linux Kernel 5.0 on Ubuntu.

First, download and install the kernel binaries via terminal commands:

### 64-bit OS ###
cd /tmp/
wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0/linux-headers-5.0.0-050000_5.0.0-050000.201903032031_all.deb
wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0/linux-headers-5.0.0-050000-generic_5.0.0-050000.201903032031_amd64.deb
wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0/linux-image-unsigned-5.0.0-050000-generic_5.0.0-050000.201903032031_amd64.deb
wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0/linux-modules-5.0.0-050000-generic_5.0.0-050000.201903032031_amd64.deb
sudo dpkg -i *.deb
### 32-bit OS ###
cd /tmp/
wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0/linux-headers-5.0.0-050000_5.0.0-050000.201903032031_all.deb
wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0/linux-headers-5.0.0-050000-generic_5.0.0-050000.201903032031_i386.deb
wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0/linux-image-5.0.0-050000-generic_5.0.0-050000.201903032031_i386.deb
wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0/linux-modules-5.0.0-050000-generic_5.0.0-050000.201903032031_i386.deb
sudo dpkg -i *.deb

After installation is finished, reboot your ubuntu system:

sudo reboot

And check linux kernel version:

uname -a

Congratulation’s! You have successfully installed Linux Kernel. Thanks for using this tutorial for installing Linux Kernel on Ubuntu system. For additional help or useful information, we recommend you to check the official Linux Kernel website.