Stacer is a great application that will help us optimize and monitor our Linux system. It has many advantages, starting because it is built with the Electron framework so its installation becomes easy. It also has a pretty graphical interface that will make the experience quite pleasant. All this being open source that will facilitate the adoption in our systems.

It is important to note that, this type of applications that are an optimizer and monitoring Linux tool, is necessary to keep an eye on the systems. In the same way, it will help us to delete packages and files not necessary for the system and thus save disk space. Finally, with Stacer, we will be able to manage Systemd services in a fast and easy way.

So, let us start to install and use it.

Stacer a great optimizer and monitoring Linux tool

How to install it on Ubuntu 18.04 and 19.04?

Its installation is quite simple, just go to the download section and look for the package .DEB and download it. Remember that Debian, Ubuntu and Linux Mint use the .DEB format and RHEL, CentOS, Fedora, and OpenSUSE use the .RPM format.

On the other hand, there is another format called AppImage that can be used by the rest of Linux distributions. Even if you use Ubuntu and do not want to use the .DEB package you can use AppImage which is a portable and universal format.

If you choose the .DEB package, once you have downloaded it, open a terminal and run the following commands:

:~$ cd Downloads/
:~$ sudo dpkg -i stacer_1.0.9_amd64.deb

Remember that the file name will change with the version number. So you have to check it first.

If you opted for the .AppImage file. You need to make it executable to run.

:~$ cd Downloads/
:~$ chmod +x stacer_1.0.9_amd64.deb

Next, open it. Either through the main menu or by double-clicking on the AppImage file.

Using Stacer

As soon as you open it, you’ll see the following:

On the left side, you will see all the options to monitor and optimize. As you can see, it is a very easy and intuitive application to use.

One of the most important options is the system cleaner. There you select what you want to clean, and thus you save space in the disk.

It is also possible to manage the systemd services with a great graphical interface. With Stacer, you will be able to start them, stop them as well as make or not to start them during system startup.

Or, check the system resources.

So, that’s it.

Conclusion

Stacer is a very useful tool to manage our system. This way we will have the necessary information about the behavior of it. But not only that but also, we can perform system maintenance tasks such as deleting unnecessary files.

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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 19.04.

Install pgAdmin4 on Ubuntu 19.04

To install pgAdmin4 on Ubuntu 19.04, it is recommended to use the PostgreSQL repository. With this, we can also have a higher version of this database manager.

So open your terminal, and run the following command to install some necessary packages.

:~$ sudo apt-get install wget ca-certificates

Next, add the GPG key for the repository.

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

Next, add the repository:

:~$ sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" >> /etc/apt/sources.list.d/pgdg.list'

Then, install pgAdmin4.

:~$ sudo apt-get update
:~$ sudo apt install pgadmin4 pgadmin4-apache2

After that, you will be asked for the initial pgAdmin4 user email and for the administrator password.

Configure pgAdmin4

Now, open your trusted web browser and go to pgAdmin with the following address http://your-server/pgadmin4

Next, add a new server.

And configure it.

And that’s 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.

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PostgreSQL is one of the consents as far as database managers are concerned. It is an open source and community solution to very large database problems. This is because PostgreSQL is very efficient in managing resources. In addition, PostgreSQL has been developed over many years, so the experience the software has is enviable.

Likewise, PostgreSQL has become one of the most reliable database managers out there, making it a formidable alternative to MariaDB.

Finally, it is good to say that PostgreSQL has a very good official documentation so you can learn everything about it.

So, let us start to install PostgreSQL on Ubuntu 19.04.

Getting PostgreSQL on Ubuntu 19.04

As I said before, PostgreSQL is in the official repositories of the distribution. So installing it is simple. However, it is also good to work with the service.

Then, open a terminal emulator and run the following command:

:~$ sudo apt install postgresql-11

After the installation is finished, Ubuntu will start the PostgreSQL service. It will also configure the service to start automatically. So we still have to verify the status of the service.

:~$ sudo systemctl status postgresql

Now, to check that the installation has been successful we will access the PostgreSQL console. With this, we will know that it is ready for work.

:~$ sudo -i -u postgres
:~# psql

Next, list all the databases:

:~# \l

So, that’s it.

Conclusion

Now you know how to install PostgreSQL in Ubuntu 19.04 and you can take full advantage of this database manager. Adeñas, Ubuntu is a great Linux distribution that allows us to use PostgreSQL in a very reliable way.

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MariaDB is a database manager very popular in the world of Linux and computer science. It is openSource and has great community support. In the same way, many great applications support MariaDB. As you can imagine, it is an SQL database manager that supports the relational data model.

Recently, MariaDB has released a new version aimed at offering a much more targeted solution to large companies. Especially those that require cluster and base their data in the cloud.

Finally, MariaDB is a MySQL fork. MySQL is another popular database manager. The problem is that it was acquired by Oracle and has suffered a small oversight in favor of the proprietary solution.

So, MariaDB and MySQL are available to be installed easily in Ubuntu 19.04. So let’s get started.

Install MariaDB or MySQL on Ubuntu 19.04

As I said before I install MariaDB / MySQL on Ubuntu 19.04 is something simple since they are included in the repositories. So the first step is to open a new terminal session and execute the following command:

To install MariaDB:

:~$ sudo apt install mariadb-server

Or to install MySQL:

:~$ sudo apt install mysql-server

After entering the password, the installation will begin.

After you have installed some of these two, you still need to configure it. Both share a Perl-based configuration script called mysql_secure_installation.

Using mysql_secure_installation will not only allow you to define the root password but you will also be able to define some settings.

:~$ sudo mysql_secure_installation

When you run it, you will be able to configure some useful things. It is recommended that you read carefully each one of them and choose according to what you need.

After that, you can use MariaDB or MySQL in your projects.

Conclusion

MariaDB and MySQL are database managers, quite important nowadays. Installing them is simple and within everyone’s reach. Now all that’s left is for you to start working with them.

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