In the past, we’ve talked about GO. GO is a programming language that is becoming increasingly popular among developers and sysadmin. Initially, it was created by Google but has been expanding to be used by many current developers. It is inspired by C++ and has binaries for Windows, Linux and Mac OS. It is also open source under the BSD license.

1.- Upgrade the system

First of all, it is necessary to make a complete update to the system. For this, run the following command:

:~$ su
:~# yum update

The main objective of this is to make your system have the latest security patches available. This way it will be more stable and you will be ready to continue with the process.

2.- Download and install GO

CentOS 7 is a 64-bit system, so we will download the corresponding binaries using wget. If you do not have it installed, do it first.

:~# yum install wget
:~# wget https://dl.google.com/go/go1.11.5.linux-amd64.tar.gz

At the time of writing this post, the latest stable version of GO is 1.11.5. Check the GO website for the latest version.

After doing this, it is necessary to unzip the downloaded folder. We will do it in the /usr/local directory.

:~# tar -zxvf go1.11.5.linux-amd64.tar.gz -C /usr/local

So that the installation does not have problems. It is necessary to define environment variables. I mean GOROOT and PATH.

:~# echo 'export GOROOT=/usr/local/go' | tee -a /etc/profile
:~# echo 'export PATH=$PATH:/usr/local/go/bin' | tee -a /etc/profile

Finally, refresh your bash profile.

:~# source /etc/profile

So, test GO.

3.- Test the installation

To verify that the installation has been correct, it is first necessary to show the version of GO. To do it, run this command:

:~# go version
:~# go env

However, the best way to check if your GO is correctly installed is to make a program and run it.

First, create a folder where the program will be located.

:~# mkdir -p src/test
:~# cd src/test

Next, create the file. I will name it test.go.

:~# nano test.go

And add the following:

package main
import "fmt"
func main() {
    fmt.Printf("Hi, I am Angelo. Thanks for visit Osradar\n")
}

Finally, run the file.

:~# go run test.go

So, GO is ready for the action.

Conclusion

Learning to program using GO is a good idea these days. The project is quite mature and more and more people are interested in this language. Installing GO on CentOS 7 is not complicated at all.

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MySQL is an open-source relational database management system (RDBMS). It is very popular among developers for being free, easy to use and very secure. In many cases, it is the entry point to other more robust applications such as Oracle Database or IBM DB2.

At the same time, many people who start with MySQL don’t feel comfortable with the way they perform operations because everything is through CLI. With the aim of minimizing the difficulty to visualize data, create a database and perform more actions with MySQL using less time is that tools such as MyWebSQL emerge.

MyWebSQL is an open source, web-based, WYSIWYG MySQL client written in PHP. It utilizes modern day technologies and browsers to provide a fast, intuitive querying and editing interface to the MySQL databases.

It was created with the following points in mind.

• Easy deployment and usage.
• Fast querying and editing on MySQL databases.
• Developer friendly to save time spent on queries and working with results.
• Usable with all major browsers without any loss of functionality.

As you can see, it is a software designed to save time with MySQL. Let’s install MyWebSQL on CentOS 7.

0. Prerequisites

The installation is really simple, however, you must take into account the following:

• MyWebSQL is also compatible with MariaDB which is a 100% MySQL compatible fork. It is the one I will use.
• You have to install LAMP first. It is not difficult.
• The commands must be executed as root user.
• The packages wget and unzip, must be installed.

Let’s get to work.

1. Install Apache web server and PHP

The first element that you need is Apache web server. To do this, run:

:~$ su
:~# yum install httpd

Then, enable it and start it.

:~# systemctl enable httpd
:~# systemctl start httpd

Then, set the Firewall rule:

:~# firewall-cmd --zone=public --add-service=http --permanent
:~# firewall-cmd --reload

To check that the whole process has been successful, go to your web browser and go to http://IP_SERVER and if you see the following, then everything is fine.

Now is PHP’s turn.

:~# yum install php php-mysql php-cli php-xml php-gd

Create a new file called t.php on /var/www/html/

:~# nano /var/www/html/t.php

And put the following:

<?php
phpinfo();
?>

Save and close the file.

Next, you have to restart apache service:

:~# systemctl restart httpd

Now, go to the web browser and try to go to http://IP_SERVER/t.php. If you see this, PHP is installed.

Note: If you want to install a more recent PHP version, I explained it here.

2. Install MariaDB

Don’t be confused, MariaDB is a fork absolutely compatible with MySQL. In addition, it comes by default in the official CentOS 7 repositories. It currently has a great support and a very active community, so it is the best option.

To install MyWebSQL this step is vital.

:~# yum install mariadb-server

Then, start and enable the service:

:~# systemctl enable mariadb
:~# systemctl start mariadb

Now, configure MariaDB using the mysql_secure_installation script.

:~# mysql_secure_installation

First, log in without a password since it has not been defined and then create one. To the rest of the questions answer, as you want, I did so: Y, N, Y, Y.

3. Install MyWebSQL

The time has come to install MyWebSQL. First, you have to download it.

:~# cd /opt/
:~# wget https://downloads.sourceforge.net/project/mywebsql/stable/mywebsql-3.7.zip

The next step is to unzip it in the apache root directory, i.e. /var/www/html.

:~# unzip mywebsql-3.7.zip -d /var/www/html/

Restart Apache.

:~# systemctl restart httpd

And that’s it.

4. Accessing to MyWebSQL

After restarting Apache web server, you should be able to start the application. Open your web browser and go to http://IP_SERVER/mywebsql.

In the place, the credentials of your server. Username and password. And then access.

As this is a newly created instance, there is not much information to show. However, I will show MySQL users.

Conclusion

To install MyWebSQL requires certain prerequisites, however, its installation is really simple. This application is very useful for those who use MySQL on a daily basis and need to see data graphically and easily.

We want to know your opinion, did you know about this application? Have you used them? How was your experience with it?

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0.What you need

Before you start, you must have certain requirements for everything to work perfectly.

• Have, at least, a notion of how to use the command line interface.
• A user who can use sudo.
• A desire to learn. Vital to acquire the knowledge that I will give you.
• A computer with Debian 9 installed. Obvious, isn’t it?

1. Install Apache web server

Generally, before you start installing and configuring a system, it is a good idea to perform a general system upgrade. With this, you will obtain the last security patches.

Open a terminal and run on it:

:~$ sudo apt update && sudo apt upgrade

After you enter your password, the update process will begin. As a result, you will have an updated and secure system.

Now, you can install apache2 from the official Ubuntu repositories. Run:

:~$ sudo apt install apache2

As a result, you can now go to your browser and set the IP address of the server and you will see a page similar to this one. Open it.

http://IP_server/

Good job. Apache is running smoothly on your computer.

2.- Create web directory for each Apache virtual host

In order to create a structure of efficient directories and that the Virtual hosts do not have problems, you must create a directory for each one of them. In this case, I will only create two virtual hosts. One called “osradar1.local” and other called “osradar2.local”.

Create the folders:

:~$ sudo mkdir -p /var/www/html/osradar1.local/public_html
:~$ sudo mkdir -p /var/www/html/osradar1.local/public_html

With this in mind proceeds to change the owner of them. Run,

:~$ sudo chown -R $USER:$USER /var/www/html/osradar1.local/public_html
:~$ sudo chown -R $USER:$USER /var/www/html/osradar2.local/public_html

Finally, change the permissions on the folders.

:~$ sudo chmod -R 755 /var/www/html/

Now, create an example index.html file, to check the operation.

:~$ sudo nano /var/www/html/osradar1.local/public_html/index.html
:~$ sudo nano /var/www/html/osradar2.local/public_html/index.html

For the first hosts (osradar1.local) in index.html, type this:

<html>
<header>
<title>
osradar1.local website
</title>
</header>
<body>
This message is from osradar1.local website
</body>
</html>

And for the second host:

<html>
<header>
<title>
osradar2.local website
</title>
</header>
<body>
This message is from osradar2.local website
</body>
</html>

3.- Create the configuration file for each host

In this step, you must create the configuration files for each virtual host, but it’s not complicated because you can rely on the default configuration file.

In the first place, copy the default configuration file, and rename it for each virtual host.

:~$ sudo cp /etc/apache2/sites-available/000-default.conf /etc/apache2/sites-available/osradar1.local.conf
:~$ sudo cp /etc/apache2/sites-available/000-default.conf /etc/apache2/sites-available/osradar2.local.conf

Now, you must edit the files to adapt them to each virtual. For example, edit osradar1.local.conf.

:~$ sudo nano /etc/apache2/sites-available/osradar1.local.conf

In that file, you must modify ServerName, ServerAlias, ServerAdmin, and DocumentRoot.

Do the same for the other virtual host.

4. Enabling configuration files

Once the configuration files are ready, you must activate them. First, disable the default configuration file and then activate the newly created virtual hosts.

:~$ sudo a2dissite 000-default.conf
:~$ sudo a2ensite osradar1.local.conf
:~$ sudo a2ensite osradar2.local.conf

And it’s ready. Now let’s check that everything was successful. Restart apache2.

:~$ sudo systemctl restart apache2

5.- Test the virtual hosts

In the first place, edit the file /etc/hosts and add your IP with the names of the virtual hosts.

:~$ sudo nano /etc/hosts

Now, go to your web browser and enter your virtual host.

And this is it. As you can see it’s really simple.

Tell us, how was your experience with Apache?

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