Yarn is a Javascript dependency manager that stands out for being fast, secure and reliable. It is presented to us as the most solid alternative to NPM. In addition, it is open source and it has the protection of a giant like Facebook what guarantees us solidity and robustness of the project. Some of its characteristics are the following:

• Fast: Yarn caches every package it has downloaded.
• Reliable: Using a detailed but concise lockfile format and a deterministic algorithm for install operations.
• Secure: Yarn uses checksums to verify the integrity of every installed package before its code is executed.

There are also other features such as its efficiency in the use of the network as well as an offline mode. All this can be found on the Github site of Yarn.

Install Yarn on Ubuntu

The process is very simple since Yarn has a package repository at our disposal. This means that the installation can be done from the terminal and using APT. So let’s go for it.

First, open a terminal emulator. Then, add the GPG key from the repository.

:~$ curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -

Then, add the Yarn repository.

:~$ echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

After that, update the APT cache.

:~$ sudo apt update

If we are currently using Nodejs and NPM, we can install Yarn using the following command:

:~$ sudo apt-get install --no-install-recommends yarn

Otherwise, we will use this one.

:~$ sudo apt-get install yarn

The main difference is that NodeJS is dependent on Yarn. Then, the second command will install it from Ubuntu repositories. And the first one will leave everything as it is.

Next, check the installed version.

:~$ yarn --version

And that’s it.

Conclusion

Yarn is a great alternative to NPM to manage the dependencies of our web projects. So it becomes essential if we are web developers or we are learning in it.

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The post How to install Yarn on Ubuntu 18.04 / Ubuntu 19.04? appeared first on Linux Windows and android Tutorials.

Opera is a well-known web browser in today’s world. Its development has been with us for some time so we are talking about a veteran program. It has many modern features, such as data synchronization, the ability to add extensions, as well as other more privacy oriented data. All this is achieved with moderate use of system resources.

So, let us start.

Install Opera Web Browser  on Ubuntu

The installation is quite simple, we will be able to do it, downloading the .deb package from the project website.

Once the .DEB package has been downloaded, we can install it by double clicking on the package. But we can also do it faster from the terminal. Open the terminal and run the following command:

:~$ cd Downloads/
:~$ sudo dpkg -i [package_name]

Then you can launch it from the main menu.

Another way to install Opera Web Browser is to manually add its repository and then run the package. This method is more reliable than the previous one. So let’s go for it.

Open a terminal and add GPG key to the repository and then add the repository.

:~$ wget -qO- https://deb.opera.com/archive.key | sudo apt-key add -
:~$ echo deb https://deb.opera.com/opera-stable/ stable non-free | sudo tee /etc/apt/sources.list.d/opera.list

Then, refresh APT and install Opera web browser.

:~$ sudo apt update
:~$ sudo apt install opera-stable

After that, launch it and use it. If for any reason you wish to uninstall it. Run the following command:

:~$ sudo apt remove opera-stable

In case you also want to delete its repository, you can do it with this other command:

:~$ sudo rm -f /etc/apt/sources.list.d/opera.list

And that’s it.

Conclusion

Opera is a great alternative to the giants of Firefox and Google Chrome. It is quite fast and easy to use, as well as safe. Some users will not be happy to know that Opera is not open source but is a great web browser.

Please share this post with your friends because they might need it.

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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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Install Java on Ubuntu 19.04 – the OpenJDK

Java belongs to Oracle so the community in function of protecting the Java source code releases it under the OpenJDK project. Thus we can have the novelties without problems of licenses. This is especially useful if we are learning the language or are immersed in educational projects.

The great advantage of OpenJDK is its community support without sacrificing, some kind of Java feature. It is also much easier to install because the packages are in the official repositories of the distribution.

So, open a terminal and run one of the following commands.

For Java 11, we need to run:

:~$ sudo apt install openjdk-11-jre

However, Java 12 is available. If you want to use it, you can install t by using this command:

:~$ sudo apt install openjdk-12-jre

So this is enough.

Install Java on Ubuntu 19.04 – The Oracle Binaries

However, if we are in a company and our project needs to be commercialized on a large or medium scale, it is advisable to use Oracle binaries. So although the download is free, we need a license to monetize the project.

The great advantage of this is that we will have many more resources from Oracle. However, one of the restrictions of the commercial version is that we will not be able to use the programs for data processing or for any commercial, production or internal commercial purpose other than development, testing, prototyping, and demonstration of the application. We also may not remove or modify any program mark or any Oracle copyright notice. So keep this in mind when choosing the version for your project.

So, to install Java on Ubuntu 19.04, We will use a PPA.

:~$ sudo add-apt-repository ppa:linuxuprising/java
:~$ sudo apt-get update

To install Oracle Java 11 on Ubuntu 19.04:

:~$ sudo apt install  oracle-java11-installer

Or, to install Oracle Java 12:

:~$ :~$ sudo apt install oracle-java12-installer

And that is it.

Conclusion

Java is a basic programming language used today, so you will probably have to use it at some point. So, now that you know how to install Java on Ubuntu 19.04 you won’t have any problems to start using it.

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Google Chrome is one of the most popular web browsers in the world. Some studies even indicate that it is the most popular along with Mozilla Firefox. Google Chrome stands out above all for its speed in loading websites, as well as its large catalog of add-ons that increase the functionality of the program. On the other hand, Google Chrome comes from the hand of Google which means that it integrates perfectly with your Google account especially if you use a mobile with Android.

Knowing this is that when installing a Linux distribution, it is almost the first thing users do. Of course Firefox is a great open source browser and flag, but Google Chrome still rules.

So in this post, we will make it as simple as possible.

Install Google Chrome on Ubuntu 19.04

For licensing reasons, Google Chrome is not included by default in large Linux distributions such as Ubuntu or Linux Mint. Many Linux users do not consider it necessary because Firefox is almost at par, but there are always many users who prefer to have it.

First, go to its website.

Next, click on the Download Chrome Button and select the .DEB package to download.

Once the file is downloaded, open your terminal and place it in the download folder as follows:

:~$ cd Downloads/
:~$ sudo dpkg -i google-chrome-stable_current_amd64.deb

As you can see, the process went smoothly. So now you can start Google Chrome from the main menu.

Conclusion

Google Chrome is perhaps the most popular web browser out there. However, its installation on Ubuntu 19.04 is not complicated at all. On the contrary, it is quite simple and is available to any novice user who just uses Linux.

Please share this article with your friends to help them with their migration to Linux.

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Ubuntu 19.04 comes with few but very important new features. The main of them is the inclusion of GNOME 3.32 which improves the user experience. This is because GNOME 3.32 has included algorithms that considerably improve its performance and resource consumption. So just for that, it becomes interesting. On top of that, we have the Linux Kernel 5 that was recently released. Additionally, all applications have been updated such as LibreOffice, Firefox, Thunderbird and so on.

The 5 things to do after install Ubuntu 19.04

1) Upgrade the system

The first thing to do after installing Ubuntu 19.04 is to update the system. Once the system has been released until we install it some time passes and it is likely that during that time, security patches have been released. So open a terminal and run:

:~$ sudo apt update && sudo apt upgrade

After entering the user’s password, the process will begin. Once finished, if you want to restart the system. In this way, the system becomes more stable and less prone to failures.

It is recommended to do it periodically to avoid gigantic updates.

2) Install Codecs Multimedia

A modern operating system that does not reproduce most of the world’s most popular multimedia codecs is not a good operating system. Fortunately, Ubuntu includes in its repositories a package that installs a lot of these codecs.

On the other hand, the package in question also installs Microsoft’s proprietary sources and other compression codecs.

So run the following command:

:~$ sudo apt install ubuntu-restricted-extras

Then, accept the license terms.

Now, you can play all your favorite music and videos.

3) Check the Software and updates windows

The way updates and repositories are configured can be viewed in the software and update window. In the first tab, you can disable which series of packages to exclude from Ubuntu downloads. It is recommended to mark them all. As well as you can change the server where to download the packages.

In the Other Software tab, we can activate the software of Canonical partners that opens the doors to more packages.

4) Install Gnome-tweak-tool

GNOME is the default Ubuntu environment. So to customize it, change the default theme and other things you need to install Tweaks tool. This way you will have even more control of customization over Ubuntu.

:~$ sudo apt install gnome-tweak-tool

It’s worth noting that you can not only modify GNOME through themes but also through extensions. These extensions are also managed by this tool.

5) Install Synaptic

Ubuntu’s software center is very good. However, it is often unreliable. So it’s always good to have the old and reliable Synaptic at hand.

Synaptic is a package manager that already has a few years on top that stands out for being fast and easy to install packages, as well as their removal and search.

:~$ sudo apt install synaptic

So, that is it.

Conclusion

These are from our point of view, the 5 things you have to do after installing Ubuntu 19.04. The rest is very much up to each user’s criteria like customizing themes or installing extensions for GNOME.

On the other hand, you can install many more applications like VLC or others to extend the functionality of Ubuntu.

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