For the PostgreSQL website and listening to many programmers, “PostgreSQL is The World’s Most Advanced Open Source Relational Database”.

This is due to its high reliability and the way it works with data. It is said that for really big projects, there is nothing like using PostgreSQL. Also, it includes tools like multi version and others that make it very powerful.

According to the official information that we can find on the web site

PostgreSQL is a powerful, open source object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.

So, let’s go for it.

Install PostgreSQL on Debian 11

Debian, which is a multipurpose operating system, has many different tools in its official repositories. So it is not surprising that PostgreSQL is also present.

In addition to the base PostgreSQL package there are also others that we can use at other times. If you want to do a search in the repositories run

sudo apt update
sudo apt search postgresql

And this way we will be able to see all these packages.

To install PostgreSQL on Debian 11, you have to run the following command

sudo apt install postgresql-13
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  git-man liberror-perl
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  libllvm11 libpq5 libxslt1.1 libz3-4 postgresql-client-13 postgresql-client-common postgresql-common ssl-cert
Suggested packages:
  postgresql-doc-13 libjson-perl
Recommended packages:
  sysstat
The following NEW packages will be installed:
  libllvm11 libpq5 libxslt1.1 libz3-4 postgresql-13 postgresql-client-13 postgresql-client-common postgresql-common ssl-cert
0 upgraded, 9 newly installed, 0 to remove and 0 not upgraded.
Need to get 42.3 MB of archives.
After this operation, 165 MB of additional disk space will be used.
Do you want to continue? [Y/n]

This will install the PostgreSQL base package which will be enough to do a job with it.

In Debian when installing an application that is managed through a systemd service, it will start automatically.

So, you can check the status of this service like this

sudo systemctl status postgresql
● postgresql.service - PostgreSQL RDBMS
     Loaded: loaded (/lib/systemd/system/postgresql.service; enabled; vendor preset: enabled)
     Active: active (exited) since Wed 2021-08-18 22:27:21 CEST; 4min 40s ago
   Main PID: 11736 (code=exited, status=0/SUCCESS)
      Tasks: 0 (limit: 2277)
     Memory: 0B
        CPU: 0
     CGroup: /system.slice/postgresql.service

So PostgreSQL is working properly. If you want to stop, restart or start the service you can use these commands

sudo systemctl stop postgresql
sudo systemctl restart postgresql
sudo systemctl start postgresql

Now let’s connect to PostgreSQL

Test the PostgreSQL installation

Now it’s time to use some PostgreSQL. The console is called psql but it is only available to the postgres user that was created during the installation.

So, first switch to the postgres user.

sudo -i -u postgres

And now if you access the console

psql

Inside it, you can execute commands. For example, list the databases:

\l

So, PostgreSQL is installed correctly and is working.

Enjoy it

Conclusion

In this post, you have learned how to install PostgreSQL in a quick and easy way that can help newbies get started with this powerful database manager.

The post Install PostgreSQL on Debian 11 appeared first on Linux Windows and android Tutorials.

Install PostgreSQL 13 on CentOS 8 / RHEL 8 / Oracle Linux 8

Both RHEL 8 and its derivatives include PostgreSQL 10 in their repositories. However, we already have available version 13. And it is recommended to install it because thanks to it, we can enjoy interesting news and improvements in the performance of the application. Important, if we are going to store large quantities of records.

So first, open a terminal session. Or if you are using a server connect to it using ssh.

:~$ ssh [your-user]@[your-host]

Then log in as the root user.

:~$ su
:~#

The best way to install PostgreSQL 13 on CentOS 8, RHEL 8 and Oracle Linux 8 is to add the official PostgreSQL refill. Not only is it easy, but also safe and the possibility to be always up to date.

To do this, run the following command:

:~# dnf install https://download.postgresql.org/pub/repos/yum/reporpms/EL-8-x86_64/pgdg-redhat-repo-latest.noarch.rpm

Then, disable the PostgreSQL module on CentOS 8.

:~# dnf module disable postgresql

Now, install PostgreSQL 13 on CentOS 8.

:~# dnf install postgresql13-server postgresql13

After that, let us configure it.

Configure PostgreSQL on CentOS / RHEL 8 / Oracle Linux 8

Initialize PostgreSQL database and start the service

After installing it, the first thing to do is to initialize the database. To achieve this, it is necessary to execute the following command:

:~# /usr/pgsql-13/bin/postgresql-13-setup initdb
Initializing database ... OK

With this, we will have already started the initial database. At this point, the PostgreSQL service is not enable, so you can’t use it yet. Then you have to do it.

:~# systemctl enable postgresql-13

Then, if you want PostgreSQL to start along with the system run this command:

:~# systemctl start postgresql-13

To check that everything is going well, check the status of the service:

:~# systemctl status postgresql-13

As you can see, everything’s fine.

Change the password to the “postgres” user and allow the remote connections

During the installation of PostgreSQL, a new user called postgres is created. The problem is that you do not define a password, so it makes you vulnerable. To avoid problems, it is convenient to create a password.

To do this, just use the Unix passwd command.

:~# passwd postgres

There you will have to enter the password twice. If both are effective, the final change will be made.

Now, we have to allow access to remote connections. The client must be installed on each of the systems that will access PostgreSQL. It will depend on each operating system.

Then, a good security measure is to specify the hosts that can access it. Of course, if the data will be served on the Internet, then it is necessary to allow all the accesses.

:~# nano /var/lib/pgsql/13/data/postgresql.conf

then searches for the listen_addresses line and places the hosts that can access it. If you allow any access, type ‘*’.

listen_addresses = '[host/IP_adress]'
or
listen_addresses = '*'

Then, restart PostgreSQL.

:~# systemctl restart postgresql-13

Finally, you have to open the port 5432 on the firewall to allow the connections.

:~# firewall-cmd --add-port=5432/tcp --permanent
success
:~# firewall-cmd --reload
success

Now, you can access to the PostgreSQL shell.

:~# su - postgres
:~# psql

Now, you can start to work.

Conclusion

PostgreSQL is one of the best there is for databases. Thanks to its community spirit, it is possible to find a lot of documentation about it. On the other hand, installing version 13 on CentOS 8, RHEL 8 and Oracle Linux 8 is quite simple as you have seen in this post.

Also, you can read how to install Postgresql on Ubuntu 18.04?

Please share this post with your friends and join our Telegram channel.

The post How to install PostgreSQL 13 on CentOS 8 / RHEL 8 / Oracle Linux 8? appeared first on Linux Windows and android Tutorials.

PostgreSQL 13 is the latest stable version of what is perhaps the most advanced open-source relational database manager. So many sysadmin need to have it on the different servers.

If you want to know all the news or at least the most important ones, you can read this post

PostgreSQL 13 is available

Well, PostgreSQL 13 comes with many important improvements and it’s a good time to install it. That’s what this post is about.

So let’s go for it.

Install PostgreSQL 13 on Debian

PostgreSQL is included in the official Debian repositories, but not in version 13 but in version 11.

The installation of PostgreSQL 13 is possible thanks to the repository it has for APT package managers that is used by Debian, Ubuntu, Linux Mint and derivatives.

So let’s start.

First, open a terminal session or connect to your server using SSH. Then, install some necessary packages:

:~$ sudo apt install gnupg gnupg2

At the end, the PostgreSQL 13 repository should be added to the list of Debian software sources. To do this, create the following file:

:~$ sudo nano /etc/apt/sources.list.d/pgdg.list

And in it he adds the following:

deb http://apt.postgresql.org/pub/repos/apt/ buster-pgdg main

Then save the changes by pressing CTRL + O and close the file by pressing CTRL + X.

For the repository to be accepted by the system, you need to add the gpg key to it. To do this, use the following command:

:~$ wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
OK

Once the process has been completed, simply update the APT cache.

:~$ sudo apt update

You can now view all the packages related to PostgreSQL 13 by typing

:~$ sudo apt install postgresql-13

But don’t press enter, just press the TAB key and you’ll see the following:

As you can see in the image, we have PostgreSQL 13 available. So to install it run the following command:

:~$ sudo apt install postgresql-13
Reading package lists... Done
Building dependency tree 
Reading state information... Done
The following additional packages will be installed:
libgdbm-compat4 libjson-perl libllvm7 libperl5.28 libpq5 libxslt1.1 perl pgdg-keyring postgresql-client-13 postgresql-client-common postgresql-common ssl-cert
Suggested packages:
perl-doc libterm-readline-gnu-perl | libterm-readline-perl-perl make libb-debug-perl liblocale-codes-perl postgresql-doc-13 openssl-blacklist
Recommended packages:
libjson-xs-perl sysstat
The following NEW packages will be installed:
libgdbm-compat4 libjson-perl libllvm7 libperl5.28 libpq5 libxslt1.1 perl pgdg-keyring postgresql-13 postgresql-client-13 postgresql-client-common postgresql-common
ssl-cert
0 upgraded, 13 newly installed, 0 to remove and 10 not upgraded.
Need to get 34.5 MB of archives.
After this operation, 145 MB of additional disk space will be used.
Do you want to continue? [Y/n]

Now we’ll see if everything went well.

Testing the installation

By default, Debian when installing PostgreSQL starts and enables the service. Therefore, it is ready to be tested. However, if you want to stop the service, you can use this command:

:~$ sudo systemctl stop postgresql

On the other hand, the best way to know if PostgreSQL is ready for work is to execute some command from the console. So we’ll access it first:

:~$ sudo -i -u postgres

Remember that the PostgreSQL console is accessed through the postgres user.

And finally, we access with this command:

:~# psql

Once inside, we can, for example, display all the databases in the system:

:~# \l

And so we can work without problems with PostgreSQL.

Conclusion

PostgreSQL 13 is a powerful database manager that is used in many projects worldwide. This makes many people want to have the latest stable versions to take even more advantage of the tool.

Please share this post and join our Telegram channel.

The post How to install PostgreSQL 13 on Debian 10? appeared first on Linux Windows and android Tutorials.

It is not necessary talk much about PostgreSQL. However, very briefly I will explain you what it is. It is a SQL database manager, open source and well known by application developers. Mainly because it has a considerably superior performance to others like MariaDB or MySQL. So we will have enterprise power in a community program. Sounds good, no?

PostgreSQL has an updated repository for Fedora. However, due to the recent release of Fedora 34, version 11 is available. So in this sense we will have no problems.

Install PostgreSQL on Fedora 34

While PostgreSQL is an application, it has many additional libraries to extend its functionality. Or, to make it work with other programming languages such as Java, Python, C++ or PHP. In addition, we can have access to other libraries of the program for development.

So, first of all, I am going to use DNF the Fedora package manager to look for all PostgreSQL related packages.

:~$ sudo dnf search postgresql

As you can see, there are many packages related to PostgreSQL. But as I said before, they refer to libraries needed to extend the functionality.

Now, let’s install it.

:~$ sudo dnf install postgresql-server

Then you have to prepare PostgreSQL for the first use. So, we have to init the database and then, start the service. After that, test it.

:~$ sudo /usr/bin/postgresql-setup --initdb

Next, enable and start the service.

:~$ sudo systemctl enable postgresql
Created symlink /etc/systemd/system/multi-user.target.wants/postgresql.service → /usr/lib/systemd/system/postgresql.service.
:~$ sudo systemctl start postgresql

Now, test the installation.

:~$ sudo su - postgres

And access to the PostgreSQL console.

:~$ psql

Then, list all databases.

:~$ \l

So, PostgreSQL is correctly installed.

Conclusion

PostgreSQL is a great database manager and today you have learned how to install it in Fedora 34. So as you can see it’s quite easy, just share this post with your friends.

The post How to install PostgreSQL on Fedora 34? appeared first on Linux Windows and android Tutorials.

pgAdmin is the most popular and features rich Open Source administration and development platform for PostgreSQL, the most advanced Open Source database in the world.

Thanks to this application, you can have a graphical interface to manage everything related to PostgreSQL. The main advantage of this program is the ability to view all the records we have stored. On the other hand, we can create connections and customize them to achieve even more security. It is also possible to create, modify, and delete databases.

So, pgAdmin4 becomes a printable application if you use a lot of PostgreSQL or if you want to use it for educational purposes.

So, let us install pgAdmin4 on CentOS 8.

Install PostgreSQL on CentOS 8

The first step we have to do is to have an instance of PostgreSQL up and running on our server. For this we have a post that can help you with this:

How to install PostgreSQL 12 on CentOS 8 / RHEL 8 / Oracle Linux 8?

Once PostgreSQL is correctly installed and configured then we can proceed to install PgAdmin4 without any problems.

Install pgAdmin4 on CentOS 8

The first thing we have to do is update the operating system.

dnf update

Then, enable the EPEL repository that we will need to enhance the installation:

dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm

Within this repository, there is one called powertool that we also have to enable.

dnf config-manager --set-enabled powertools

And finally, install pgAdmin4 by running the following command:

dnf --enablerepo=powertools install pgadmin4

After accepting the changes, the download and installation process will begin.

Preparing pgAdmin4 for the firt use

Before using pgAdmin4 it is advisable to make a few settings so as not to have problems of any kind.

First, start and enable the Apache webserver that was installed during the process.

systemctl enable httpd
systemctl start httpd

pgAdmin comes with a default Apache configuration, which we can use or modify. In this case, we will copy it to take advantage of it.

cp /etc/httpd/conf.d/pgadmin4.conf.sample /etc/httpd/conf.d/pgadmin4.conf

Apply the changes by restarting Apache:

systemctl restart httpd

The next step is to create dedicated folders for pgAdmin log and lib. You can choose another location but the most pertinent is /var/

mkdir -p /var/lib/pgadmin4/
mkdir -p /var/log/pgadmin4/

You can then configure pgAdmin4 to tell it to use the paths of the folders you have created.

nano /usr/lib/python3.6/site-packages/pgadmin4-web/config_distro.py

And add the following lines:

LOG_FILE = '/var/log/pgadmin4/pgadmin4.log
SQLITE_PATH = '/var/lib/pgadmin4/pgadmin4.db
SESSION_DB_PATH = '/var/lib/pgadmin4/sessions
STORAGE_DIR = '/var/lib/pgadmin4/storage 

Save the changes, and then close the file.

Now define the username and password that we will use to access pgAdmin4.

python3 /usr/lib/python3.6/site-packages/pgadmin4-web/setup.py 

And there you will have to set the password.

Assign Apache to be the owner of the created directories.

chown -R apache:apache /var/lib/pgadmin4
chown -R apache:apache /var/log/pgadmin4

Apply all changes by restarting Apache and PostgreSQL.

systemctl restart httpd
systemctl restart postgresql-12 

Now we can use it.

Testing the installation

Now we can access http://your-server/pgadmin4 and you should see the following screen

Now login with your credentials and you will see the pgAdmin main screen. This proves that everything works.

All you have to do now is add your PostgreSQL instance.

Conclusion

pgAdmin4 is a vital tool to manipulate PostgreSQL visually and very easily. Its potentials are vast and it is recommended that you visit the project website to learn more about it.

The post How to install pgAdmin4 on CentOS 8? appeared first on Linux Windows and android Tutorials.

This stack also provides us with a functional server but with a different database manager like PostgreSQL. This database handler is maybe the most powerful in the world in open source. So it is normal that many want to make the change.

So, let’s start.

How to install LAPP on Ubuntu 20.04

1.- Install Apache web server on Ubuntu 20.04

The first step is to install the Apache webserver which is one of the most secure and reliable servers within Linux. Together with Nginx, they are one of the most popular in the world.

So, open a terminal or SSH session and run it:

sudo apt install apache2

Then, start the service and enable it to start with the system:

sudo systemctl start apache2
sudo systemctl enable apache2

Finally, you can open a web browser and go to the following address http://your-server or http://ip-server and you will see Apache’s default page.

This indicates that the installation has been successful.

2.- Install PHP on Ubuntu 20.04

Now the next component is PHP which is a very popular programming language in the web environment. Therefore, it must be installed along with some of its fundamental modules.

php7.4 libapache2-mod-php7.4 openssl php-imagick php7.4-common php7.4-curl php7.4-gd php7.4-imap php7.4-intl php7.4-json php7.4-ldap php7.4-mbstring php7.4-pgsql php-ssh2 php7.4-xml php7.4-zip unzip

Now to prove that PHP and Apache are working properly, let’s make a test file.

sudo nano /var/www/html/test.php

And add the following content:

Save the changes and close the editor.

Then restart Apache:

sudo systemctl restart apache2

Then open it from your web browser, for example http://your-server/test.php

If you manage to see a page with the PHP information, then both are working correctly.

3.- Install PostgreSQL on Ubuntu 20.04

PostgreSQL is one of the most advanced and modern relational database managers out there. It is always shown as the immediate competitor of MySQL and MariaDB in the segment of open source and community database managers.

One of the main advantages of using PostgreSQL is that it has extensive documentation and supports powerful features. All this in an open-source and free application.

Installing PostgreSQL is quite simple and we explain it in detail in this post:

How to install PostgreSQL on Ubuntu 20.04?

And so you have the LAPP stack ready to work.

Conclusion

The LAMP stack is one of the popular and famous ones that exist but it is not the only one. Now we present you an alternative that changes to MySQL / MariaDB by PostgreSQL in a fast and easy way and forming the LAPP stack that is quite used too

Thanks for reading

The post How to install LAPP (Apache + PHP + PostgreSQL) on Ubuntu 20.04 appeared first on Linux Windows and android Tutorials.

pgAdmin is the most popular and features rich Open Source administration and development platform for PostgreSQL, the most advanced Open Source database in the world.

Thanks to this application, you can have a graphical interface to manage everything related to PostgreSQL. The main advantage of this program is the ability to view all the records we have stored. On the other hand, we can create connections and customize them to achieve even more security. It is also possible to create, modify and delete databases.

So, pgAdmin4 becomes a printable application if you use a lot of PostgreSQL or if you want to use it for educational purposes.

So, let us install pgAdmin4 on Ubuntu 20.04.

Install pgAdmin4 on Ubuntu 20.04

First, you need to install PostgreSQL on Ubuntu 20.04

Install PostgreSQL on Ubuntu 20.04

To install pgAdmin4 on Ubuntu 20.04 we need to add an external repository. This is so that we can have the latest version available for this program.

So, create a new repository file called pgdg.list

:~$ sudo nano /etc/apt/sources.list.d/pgdg.list

And add the next line in the file:

deb http://apt.postgresql.org/pub/repos/apt/ focal-pgdg main

Save the changes and close the file.

Then add the GPG key to the repository to make sure the system can recognize it.

wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
OK

Refresh the repositories:

:~$ sudo apt-get update

And now yes, install pgAdmin4 on Ubuntu 20.04 with the following command:

:~$ sudo apt install pgadmin4 pgadmin4-apache2

During the installation, you will be asked to enter the user’s email address. This email will be used to login.

After that, define the initial password:

When the installation is complete, enable the rewrite PHP mod:

:~$ sudo a2enmod rewrite
Enabling module rewrite.
To activate the new configuration, you need to run:
systemctl restart apache2

So, restart Apache:

:~$ sudo systemctl restart apache2

Now let’s test it by making a connection.

Testing pgAdmin4 on Ubuntu 20.04

We need to prove that everything is OK, to do so, open your web browser and go to the following address:

http://your-server/pgadmin4/

Or:

http://localhost/pgadmin4/

And you will see the Login screen.

Enter the email and password you created during the installation and you will see the following screen:

Now we will create a new connection, to do this click on the option Add New Server.

In the General tab, assign a name to the connection.

Then, in the Connection tab, define the connection parameters such as host, username, port, and password.

If everything went well, the connection will be active.

So, enjoy it.

Conclusion

pgAdmin4 is a vital tool to manipulate PostgreSQL visually and very easily. Its potentials are vast and it is recommended that you visit the project website to learn more about it.

Please share this post with your friends and join our Telegram Channel. Also, buy us a coffee.

The post How to install PgAdmin4 on Ubuntu 20.04? appeared first on Linux Windows and android Tutorials.

PostgreSQL

PostgreSQL is one of the most advanced and modern relational database managers out there. It is always shown as the immediate competitor of MySQL and MariaDB in the segment of open source and community database managers.

One of the main advantages of using PostgreSQL is that it has extensive documentation and supports powerful features. All this in an open-source and free application.

On the other hand, PostgreSQL has certain features that make it quite complete as is the proper management of resources or its ability to be multi-version. All this together with an experienced development makes it quite powerful.

Install PostgreSQL on Ubuntu 20.04

With every new system, there are lots of software updates. So, at the time of writing this post, PostgreSQL 12 is the latest stable version and is in the Ubuntu 20.04 repositories.

So, open a terminal and refresh the APT cache.

:~$ sudo apt update

Once the process is complete, you can list all PostgreSQL-related packages in the official repositories:

:~$ sudo apt list postgresql*

In the image, you can see that there are many PostgreSQL packages in the repositories. This means that the installation will be easy.

Also, these packages that you probably don’t know, are libraries and add-ons for PostgreSQL. If you are an experienced developer you will probably have to use them eventually.

However, if you are a newcomer, you may feel a bit overwhelmed by the number of packages available, so you can only consult the postgresql meta package

:~$ sudo apt list postgresql
postgresql/focal 12+214 all

So, to install PostgreSQL 12 on Ubuntu 20.04 just run this command:

:~$ sudo apt install postgresql-12
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libllvm10 libpq5 libsensors-config libsensors5 postgresql-client-12 postgresql-client-common postgresql-common sysstat
Suggested packages:
  lm-sensors postgresql-doc-12 libjson-perl isag
The following NEW packages will be installed:
  libllvm10 libpq5 libsensors-config libsensors5 postgresql-12 postgresql-client-12 postgresql-client-common postgresql-common sysstat
0 upgraded, 9 newly installed, 0 to remove and 0 not upgraded.
Need to get 30.6 MB of archives.
After this operation, 121 MB of additional disk space will be used.
Do you want to continue? [Y/n]

If all goes well, at the end of the screen output you will see some useful information to help you with your PostgreSQL 12.

As in other installations of other programs such as MySQL or MariaDB, Ubuntu automatically starts the PostgreSQL service. In case you want to stop it, run this command

:~$ sudo systemctl stop postgresql

Also, Ubuntu enables PostgreSQL to start with the system. If you do not want it to

:~$ sudo systemctl disable postgresql

To reverse these changes, execute these two commands:

:~$ sudo systemctl start postgresql
:~$ sudo systemctl enable postgresql

In short, PostgreSQL is one more service of the system, so you can manage it thanks to the systemctl command.

Finally, check the status of the service to know if it is running correctly:

:~ sudo systemctl status postgresql
● postgresql.service - PostgreSQL RDBMS
     Loaded: loaded (/lib/systemd/system/postgresql.service; enabled; vendor preset: enabled)
     Active: active (exited) since Tue 2020-05-05 14:57:30 UTC; 35min ago
   Main PID: 2704 (code=exited, status=0/SUCCESS)
      Tasks: 0 (limit: 506)
     Memory: 0B
     CGroup: /system.slice/postgresql.service
May 05 14:57:30 osradar systemd[1]: Starting PostgreSQL RDBMS...
May 05 14:57:30 osradar systemd[1]: Finished PostgreSQL RDBMS.

So, PostgreSQL is running correctly and is ready for work.

Testing PostgreSQL on Ubuntu 20.04

The truth is that it is useless to install without at least checking that everything is fine. To do this, you need to at least execute a command in the PostgreSQL console.

PostgreSQL takes security quite seriously so during the installation, it creates a new system user. It is this user called postgres that has access to the PostgreSQL console.

So, to change the user, run the following command:

:~$ sudo -i -u postgres

Then, access the PostgreSQL console with this command:

:~$ psql

And now you can start typing certain commands to prove that PostgreSQL is working correctly. For example, show all the databases that exist:

:~# \l

This way, we can be sure that the installation has been a success.

Conclusion

A great application can not be made if it does not have the backing of a great database manager. This is why today we have taught you how to install PostgreSQL on Ubuntu 20.04 because we are sure that an application that uses this database manager is synonymous with security and robustness.

Please share this post and join our Telegram channel.

The post How to install PostgreSQL on Ubuntu 20.04? appeared first on Linux Windows and android Tutorials.

PostgreSQL

PostgreSQL is one of the most advanced and modern relational database managers out there. It is always shown as the immediate competitor of MySQL and MariaDB in the segment of open source and community database managers.

One of the main advantages of using PostgreSQL is that it has extensive documentation and supports powerful features. All this in an open-source and free application.

And recently version 12 has been released. If you want to know more about it read our post about it.

PostgreSQL 12.0 is available

This new version includes security improvements and interesting new features so it’s a good idea to install it.

So, let us start.

Install PostgreSQL on FreeBSD 12

In this guide, we will use commands that require you to be root. In this case, we will choose a user with privileges to use sudo. In case your user can’t do it, you can read our post.

How to enable sudo on FreeBSD 12.

If you are already the root user, you can simply remove the word sudo from the following commands.

The first step is to upgrade the system completely. To do this, open your FreeBSD terminal and run the following command:

:~$ sudo pkg update

After this, the system will be ready for work.

The goal of this post is to install PostgreSQL 12 on FreeBSD but in the official repositories, we have several versions of PostgeSQL.

:~$ sudo pkg search ^postgresql |grep -i server
postgresql10-server-10.11      PostgreSQL is the most advanced open-source database available anywhere
postgresql11-server-11.6       PostgreSQL is the most advanced open-source database available anywhere
postgresql12-server-12.1       PostgreSQL is the most advanced open-source database available anywhere
postgresql94-server-9.4.25     PostgreSQL is the most advanced open-source database available anywhere
postgresql95-server-9.5.20     PostgreSQL is the most advanced open-source database available anywhere
postgresql96-server-9.6.16     PostgreSQL is the most advanced open-source database available anywhere

The above command performs a search of the PostgreSQL package repositories but refines the search to server.

As you can see, versions 9.4, 9.5, 9.6,10,11 and 12 are available. Let’s install the version 12. To do so, run the following:

:~$ sudo pkg install postgresql12-server
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
The following 5 package(s) will be affected (of 0 checked):

New packages to be INSTALLED:
	postgresql12-server: 12.1
	icu: 65.1,1
	postgresql12-client: 12.1
	perl5: 5.30.1
	readline: 8.0.1

Number of packages to be installed: 5

The process will require 141 MiB more space.
31 MiB to be downloaded.

Proceed with this action? [y/N]:

Then, the installation will start normally.

Once the installation is complete, the first thing to do is to get PostgreSQL started with the system. This is not mandatory but it is convenient in many cases.

So to do this, edit the /etc/rc.conf file

:~$ sudo nano /etc/rc.conf

Now add the following:

postgresql_enable="YES"

Save the changes and close the file. In case you don’t have nano installed, you can do it with the following command:

:~$ sudo pkg install nano

Before starting the PostgreSQL service the default database must be initialized. To do this, run the following command:

:~$ sudo service postgresql initdb
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "C".
The default text search configuration will be set to "english".

Data page checksums are disabled.

creating directory /var/db/postgres/data12 ... ok
creating subdirectories ... ok
selecting dynamic shared memory implementation ... posix
selecting default max_connections ... 100
selecting default shared_buffers ... 128MB
selecting default time zone ... America/Caracas
creating configuration files ... ok
running bootstrap script ... ok
performing post-bootstrap initialization ... ok
syncing data to disk ... ok

initdb: warning: enabling "trust" authentication for local connections
You can change this by editing pg_hba.conf or using the option -A, or
--auth-local and --auth-host, the next time you run initdb.

Success. You can now start the database server using:

    /usr/local/bin/pg_ctl -D /var/db/postgres/data12 -l logfile start

And now you can start the PostgreSQL service with the following command:

:~$ sudo service postgresql start
2020-02-05 14:52:37.731 -04 [869] LOG:  starting PostgreSQL 12.1 on amd64-portbld-freebsd12.0, compiled by FreeBSD clang version 6.0.1 (tags/RELEASE_601/final 335540) (based on LLVM 6.0.1), 64-bit
2020-02-05 14:52:37.732 -04 [869] LOG:  listening on IPv6 address "::1", port 5432
2020-02-05 14:52:37.732 -04 [869] LOG:  listening on IPv4 address "127.0.0.1", port 5432
2020-02-05 14:52:37.735 -04 [869] LOG:  listening on Unix socket "/tmp/.s.PGSQL.5432"
2020-02-05 14:52:37.749 -04 [869] LOG:  ending log output to stderr
2020-02-05 14:52:37.749 -04 [869] HINT:  Future log output will go to log destination "syslog".

Finally, access the PostgreSQL console with the following command:

:~$ sudo -u postgres psql

As you can see you can already use PostgreSQL 12 on FreeBSD without problems.

Conclusion

PostgreSQL is perhaps the best open source database manager and this consideration has not been given away. It has been earned with many jobs and above all with extraordinary performance. Now you know how to install it on FreeBSD 12.

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OmniDB is an open-source tool that makes it easy for us to manage SQL databases. It currently supports PostgreSQL, MySQL, MariaDB, and Oracle. However, you won’t be stuck with them, because they are already working on supporting Firebird, SQLite, SQL Server, and IBM DB2. This gives us an idea of how ambitious the project is.

The tool has two installation modes. The first is a desktop application that can be installed on Linux, with DEB and RPM installers.

Besides it, OmniDB has an installer that we can install in a server and be used through a web interface like PHPMyAdmin. This can be very practical in some cases.

Some of the main features of this application are the following:

• Encryption of all data. Making the connection always secure.
• Auto-completion of SQL sentences. Making the use of SQL language quite fast.
• Responsive and web-based interface.
• Cross-platform. Which will make us have no problems in installing it in different work environments.

So let’s install it and have a look at it.

Getting OmniDB the tool to manage databases

First, go to the download section on the application website. There select the package according to the distribution you use. In this case, I installed it on a computer with Linux Mint 19 / Ubuntu 18.04. So I downloaded the DEB package.

Then install the downloaded package. In my case when using Ubuntu or Linux Mint, I ran the following command:

:~$ sudo dpkg -i [package_name]

Of course, replace package_name with the name and path of the package. The name can vary according to the version number.

Then you can run it from the main menu without problems.

Using OmniDB

The first time you run the application it will look pretty basic and clean. Of course, it’s because we don’t have any connections set up.

To make a new connection click on the Connections button. There you will see the following image.

Then click on the New Connection button. There the following screen will be displayed.

In the Technology field, you have to select which database manager you want to connect to. And so in each field, you have to write the different credentials and data. Next, press the save data button to save the credentials.

At the end of the list of fields (right side), you will have the buttons to delete a connection, test connection, and use connection.

Once you activate the connection, this is how the application will look.

On the left side, you can see the active connection. In this case only one, but you can work with several simultaneously.

As we can also see, everything is in place. There is a space reserved to show the data, as well as to make sentences.

For example, I will use the sentence editor to create a new database.

I just have to type the command and click the run button.

You can then create a table graphically or using an SQL template. I have found this to be phenomenal, especially in educational contexts.

Finally, this is how the data would be presented if a table had it.

So, enjoy it.

Conclusion

OmniDB is emerging as a serious and reliable alternative for database management on many systems. It is quite efficient and robust.

On the other hand, the graphical interface can be improved not by the appearance but by the clarity of the options. Anyway, it can be managed in a few minutes.

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