Meeting Wing

Wing is an IDE for Python that is presented to us as one quite fast and with the slogan of being as productive as possible. With 3 versions, the first is Wing Pro which is a paid version with all the features that the project offers. The second is Wing Personal oriented to students and middle-level programmers who will have an IDE without so many features but functional and agile to get the job done. The last one is Wing 101 which is a basic version of the application. It is used by teachers to teach about Python.

Of course, the main features of Wing are present in all versions. However, it is fair to say that Wing Pro is the most complete version and is at the same level as other solutions such as PyCharm.

Some of the features found in all versions of Wing are:

• It has improved the support of multiple selections.
• Raspberry Pi support has been improved.
• Support for Python 3.8 / 3.7 and Stackless 3.4.
• Autocompletion in strings and comments.
• Syntax indicator and error indicators. Syntax highlighting for Markdown files.
• Optimized debugger.
• Support for Django

Although the license of Wing Pro is not high, they have a program where they give licenses to developers who collaborate in open source projects. It’s a great way to collaborate with the open source community and with these projects.

In addition, as expected Wing is available for Windows, Linux and MacOS. However, where it is best programmed is in our Linux system. So there I will teach you how to install it.

Install Wing Python IDE on Ubuntu 20.04 / 18.04

At the time of writing this post, the version of Wing is the 7.0.3 that was recently released. It has many code improvements and bug fixes.

In the download section of the Wing website, we will have different options, in this case, install Wing Personal because I think it is enough for most. Then, download the DEB file.

However, you can do it from the terminal. To do this, open it and run this command.

:~$ wget -c https://wingware.com/pub/wing-personal/7.2.9.0/wing-personal7_7.2.9-0_amd64.deb

After that, install it.

:~$ sudo apt install ./[file_path]

Then, launch it from the main menu.

Now, enjoy it.

Conclusion

Programming is not a simple matter; on the contrary, it entails great difficulties. Having tools to facilitate the process is the essence of IDE. In this context, Wing is a quite competent IDE for python and is presented as a serious alternative in the market.

Please, share this post.

The post Install Wing Python IDE on Ubuntu 20.04 /18.04 appeared first on Linux Windows and android Tutorials.

Java is one of the preferred languages by many developers but it is also necessary to run other very important software. In this sense, Oracle from time to time releases a new version that includes good news.

So, if you are a developer and want to try Java 16 on Ubuntu, this post will help you with that.

Install Oracle Java 16 on Ubuntu

The easiest way to install Oracle Java on Ubuntu is by using the PPA of the Linuxuprising people.

In a very brief way, the package is an installer that takes care of downloading the Oracle binaries. Also, it extracts them and copies them in the appropriate directory and everything by us.

So, it opens a terminal or an SSH session.

Once the terminal is started, it updates the whole system:

sudo apt update
sudo apt upgrade

This way we will have the system ready with the security patches to start the installation.

Now, add the PPA repository:

sudo add-apt-repository ppa:linuxuprising/java
Oracle Java 11 (LTS) and 16 installer for Ubuntu (21.04, 20.10, 20.04, 18.04, 16.04 and 14.04), Pop!_OS, Linux Mint and Debian.
 Java binaries are not hosted in this PPA due to licensing. The packages in this PPA download and install Oracle Java, so a working Internet connection is required.
 The packages in this PPA are based on the WebUpd8 Oracle Java PPA packages: https://launchpad.net/~webupd8team/+archive/ubuntu/java
 Created for users of https://www.linuxuprising.com/
 Installation instructions (with some tips), feedback, suggestions, bug reports etc.:
 Oracle Java 11: https://www.linuxuprising.com/2019/06/new-oracle-java-11-installer-for-ubuntu.html
 Oracle Java 16: https://www.linuxuprising.com/2021/03/how-to-install-oracle-java-16-on-debian.html
 Important notice regarding Oracle Java 11 and newer: the Oracle JDK license has changed starting April 16, 2019. The new license permits certain uses, such as personal use and development use, at no cost -- but other uses authorized under prior Oracle JDK licenses may no longer be available. A FAQ is available here: https://www.oracle.com/technetwork/java/javase/overview/oracle-jdk-faqs.html . After this change, new Oracle Java 11 releases (11.0.3 and newer) require signing in using an Oracle account to download the binaries. This PPA has a new installer that requires the user to download the Oracle JDK 11 .tar.gz and place it in a folder, and only then install the "oracle-java11-installer-local" package. Details here:  https://www.linuxuprising.com/2019/06/new-oracle-java-11-installer-for-ubuntu.html
 About Oracle Java 10, 12, 13 and 14: These versions have reached the end of public updates, therefore they are longer available for download. The Oracle Java 10/12/13/14 packages in this PPA no longer worked due to this, so I have removed them. Switch to Oracle Java 11 or OpenJDK 11 instead, which is long term support, or the latest Java 16.
  More info: https://launchpad.net/~linuxuprising/+archive/ubuntu/java
 Press [ENTER] to continue or Ctrl-c to cancel adding it.

It then updates the repositories using APT:

sudo apt update

So, now you can start the installation of Oracle Java 16 on Ubuntu, to do this run:

sudo apt install oracle-java16-installer
Reading package lists… Done
 Building dependency tree       
 Reading state information… Done
 The following additional packages will be installed:
   binutils binutils-common binutils-x86-64-linux-gnu java-common libbinutils libctf-nobfd0 libctf0
 Suggested packages:
   binutils-doc binfmt-support visualvm ttf-baekmuk | ttf-unfonts | ttf-unfonts-core ttf-kochi-gothic | ttf-sazanami-gothic ttf-kochi-mincho | ttf-sazanami-mincho
   ttf-arphic-uming firefox | firefox-2 | iceweasel | mozilla-firefox | iceape-browser | mozilla-browser | epiphany-gecko | epiphany-webkit | epiphany-browser | galeon
   | midbrowser | moblin-web-browser | xulrunner | xulrunner-1.9 | konqueror | chromium-browser | midori | google-chrome
 Recommended packages:
   gsfonts-x11 oracle-java16-set-default
 The following NEW packages will be installed:
   binutils binutils-common binutils-x86-64-linux-gnu java-common libbinutils libctf-nobfd0 libctf0 oracle-java16-installer
 0 upgraded, 8 newly installed, 0 to remove and 39 not upgraded.
 Need to get 2,433 kB of archives.
 After this operation, 13.9 MB of additional disk space will be used.
 Do you want to continue? [Y/n]

During the installation, you will see a screen where you will have to accept the license terms. After accept them, the installation will continue.

To make Java 16 the default version, install this package:

sudo apt install oracle-java16-set-default

Then, verify the installation with the following command:

java --version
java 16 2021-03-16
 Java(TM) SE Runtime Environment (build 16+36-2231)
 Java HotSpot(TM) 64-Bit Server VM (build 16+36-2231, mixed mode, sharing)

So, Java 16 is installed and ready to use.

Conclusion

Java 16 has been released with many new features and this makes many want to leap an old version to this one. Therefore, in this post, you could learn how to install it in Ubuntu.

So, share this post with your friends and join our Telegram channel

The post How to install Oracle Java 16 on Ubuntu 20.04 / 18.04? appeared first on Linux Windows and android Tutorials.

Wireshark is a free and opensource web analyzer. It allows you to know from a quite technical point of view what is happening in your network. With this, you can make statistics, specific monitoring or simply know its traffic.

Some of the main features of Wireshark are:

• Deep inspection of hundreds of protocols, with more being added all the time.
• Live capture and offline analysis.
• Standard three-pane packet browser.
• Captured network data can be browsed via a GUI, or via the TTY-mode TShark utility.
  The most powerful display filters in the industry.
• Rich VoIP analysis.

And many more. However, one of the most outstanding features is that it is cross-platform. In other words, you can install it on Windows, Linux, FreeBSD, Solaris, and other systems.

So, let’s install Wireshark.

1. Install Wireshark on Ubuntu 20.04/18.04

To install Wireshark more easily on Ubuntu 16.04, it is necessary to use a PPA repository of its developers. We have two options to install, the developing version or the latest stable version. I’ll show you the process for both, but in this post, I’ll install the stable version. If you use Ubuntu 20.04/ 18.04 this is not necessary.

If you want to install the development version:

Open a terminal and run:

:~$ sudo add-apt-repository ppa:dreibh/ppa
:~$ sudo apt update
:~$ sudo apt install wireshark

And that’s it.

Install the stable version:

It is always best to install the stable version of any program. That’s to avoid major bugs and surprises. It is clear that no application is free of bugs, but stable versions are less prone to them.

Open a Terminal and add the external repository with this command:

:~$ sudo add-apt-repository ppa:wireshark-dev/stable

Next, refresh the APT cache.

:~$ sudo apt update

Then install Wireshark.

:~$ sudo apt install wireshark

During installation, we will be asked if we want Wireshark to be available to all users member of wireshark group. Say yes.

And that’s it.

2. Configuring Wireshark

First, check the version of Wireshark installed.

:~$ wireshark -v

Next, add your current user to the wireshark group so you can use it without problems.

:~$ sudo usermod -a -G wireshark $USER

Now, change dumpcap permissions. With this you will make it possible to run without permission problems.

:~$ sudo chgrp wireshark /usr/bin/dumpcap
:~$ sudo chmod 750 /usr/bin/dumpcap
:~$ sudo setcap cap_net_raw,cap_net_admin=eip /usr/bin/dumpcap

After you do these steps, run Wireshark from the main menu.

Now, you can start to monitor your network.

Note: some case you need to run wireshark as root user.

Conclusion

Wireshark is a vital tool for many sysadmin or network enthusiasts. Its installation is quite simple but its power is almost unmatched.

Please share this post with your friends.

The post How to install Wireshark on Ubuntu 20.04/18.04? appeared first on Linux Windows and android Tutorials.

eSpeak to convert text to speech

In general, we can say that eSpeak is an application written in open-source C that allows transforming the text into a voice file. In short, it works as a synthesizer.

The application can be installed in multiple operating systems such as Windows, Linux and macOS. However, in Linux there is a fork called eSpeak NG that was born with the aim of facilitating the compilation for unix systems.

eSpeak is quite a wonder. In the first place, because it supports many languages including the most spoken as English, Cantonese, Japanese and others. Also because the audio quality is quite good and is very reliable in its target.

One aspect to keep in mind the application is that it is a tool purely used in the terminal. So you have to get to work on it. But do not worry the community has developed a graphical interface for the program called gespeaker.

So, let us install it.

Install eSpeak on Ubuntu 20.04 / 18.04 / Linux Mint 19/20

A great advantage is that eSpeak is an application that is available in the official repositories of Ubuntu- So to install it, just use the following command:

:~$ sudo apt install espeak

Once installed, it will be ready for action. If you don’t want to use eSpeak from the temrinal, you can install gespeaker which is a graphical interface for the application.

:~$ sudo apt install gespeaker

And now you can use the application.

Install eSpeak on CentOS 7 / CentOS 8

In the case of CentOS 7 and 8, they are also available in the official repositories. So as a root user you run some of these commands depending on which version of CentOS you are running:

For CentOS 7:

:~$ su 
:~# yum install espeak 

But if you use CentOS 8:

:~$ su
:~# dnf install espeak

This way, you will have the application running.

Basic use of eSpeak

The most basic way to use eSpeak through the console is with the following syntax:

:~$ espeak "[text_to_convert]" -w [output_file] -g [x] -p [x] -s [x] -v [language]

I’ll explain briefly. First we invoke the command and pass it the text we want it to “read”. With the -w option we simply point to the path of the output file. The -g option is used to set the pause time between words. -p defines the pitch. To define the reading time we use the option -s and finally we set the language of the reading.

An example would be the following:

:~$ espeak "Hello welcome to osradar" -w /tmp/output.wav -g 10 -p 80 -s 100 -v en-uk

Then, open the file with VLC or another media player.

If you want to use the graphical interface, just install it. This is how it looks.

And enjoy it.

The post How to install eSpeak on CentOS 8 / Ubuntu 20.04 / 18.04? appeared first on Linux Windows and android Tutorials.

QTCreator a perfect IDE for QT

QT is a framework of libraries to make graphical user interfaces. It is thought in the beauty and uniformity of the elements, as well as in the correct execution of the same ones. Many large applications use QT, such as the Plasma desktop environment and its applications. But also, applications known as VLC use it.

There is no better way to take advantage of QT than by using QTCreator. QTCreator is a lightweight, open-source framework that integrates seamlessly with many QT developer needs. It is also designed to make C++ development of the Qt application faster and easier. It has many features you have to look.

Since its conception, QTCreator does not intend to rival other IDEs like Eclipse or Netbeans, but on the contrary to serve as a gateway to QT development.

QTCreator is related to C++ development but supports other programming languages such as Python and C#.

So let’s start installing QTCreator on Ubuntu.

Install QTCreator on Ubuntu 20.04 / 18.04

Basically, there are two ways to install QTCreator on Ubuntu 20.04/ 18.04. The first is through the main distribution repositories. If we want to develop calmly sacrificing a little the new features of each version, the ideal is to choose this method.

So, open a terminal and run the following:

:~$ sudo apt install qtcreator

Of course, that is the only way to install the IDE, but if we do not install the necessary libraries and compilers, it will not do us any good. So, install them.

:~$ sudo apt install build-essential

If you have multiple versions of Qt, you probably want 5 to be the default QTCreator version to use. To do this, install the following package.

:~$ sudo apt install qt5-default

Then we can begin to develop. However, it is convenient to install the QT documentation and its examples to help the development.

:~$ sudo apt install qt5-doc qt5-doc-html qtbase5-doc-html qtbase5-examples

Now you can start QTCreator and start working.

On the contrary, if you want a more updated version of QTCreator or QT. Go to the QT website and download the online installer.

Once downloaded, assign it execution permission and execute it by double-clicking on it.

:~$ chmod +x [file_path]

Just follow the instruction and then, you will have to choose what to install.

After configuring other small things like the installation location, you can start the download process.

Finally, launch it.

Conclusion

QT is a great graphic library for your modern applications. But behind a great library, there is a great IDE. In this case, QTCreator is quite good and ideal for developing applications that use QT. And in this post, you have learned how to install it.

Please share this post with your friends.

The post Install QTCreator on Ubuntu 20.04 / 18.04 appeared first on Linux Windows and android Tutorials.

Fortran is not dead

If we speak mythical programming languages, we will have to talk about Fortran. It is a language focused on numerical calculation, designed in its beginnings for IBM computers and used in scientific and engineering applications and is the oldest of the high-level languages.

Therefore, Fortran was very important in computer science in the last century. You might think that nobody uses it anymore or something does. But the banking sector, in the scientific sector and in other companies that still use this language, pay good amounts of money for experts in the language. It is because of this that many programmers have turned their eyes to Fortran.

Getting GNU Fortran on Ubuntu 20.04 / 18.04

GNU Fortran is a Fortran 95/003/2008 compiler created by GNU. It is also known on the Internet as GFortran. It is open source, released under the GPL license. With the aim of creating a modern compiler capable of running on multiple systems and multiple environments.

The latest version available is version 9. It has many improvements in every Fortran version it supports. You can check the improvements here.

So, let us install GNU Fortran on Ubuntu.

First, open a terminal and add the Ubuntu test repository. This step is only for Ubuntu 18.04.

:~$ sudo add-apt-repository ppa:ubuntu-toolchain-r/test

Next, refresh the APT cache.

:~$ sudo apt update

Finally, install GNU Fortran 9 by using this command:

:~$ sudo apt install gfortran-9

Then, check the installed version.

:~$ gfortran-9 --version
GNU Fortran (Ubuntu 9.3.0-10ubuntu2) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Now, let us test it. Create a new file called hello.f90. And add the following.

:~$ nano hello.f90
program hello
write(6,*)'Hello world. Welcome to osradar.'
stop
end

Press CTRL + O to save the changes and CTRL + X to close.

After that, compile it using the terminal.

:~$ gfortran-9 -o hello hello.f90

Then, run it.

:~$ ./hello
Hello world! Welcome to Osradar

So, everything is working.

Conclusion

Fortran is a very old programming language. However, there are sectors where it is very important and that is why there are still tools for the language. In this case, we have Fortran and the GNU Fortran compiler.

If you are a developer, you can get more post about programming.

Please share this post with your friends.

The post How to install GNU Fortran on Ubuntu 20.04 / 18.04? appeared first on Linux Windows and android Tutorials.

OpenMeetings is an Apache Foundation project that allows you to deploy a server for Internet conferencing. But it’s not only limited to that, but it also provides chat and file transfer.

Also, OpenMeetings is released as open-source and because it is built in Java it can be run on many different operating systems. With this, quality and security are guaranteed because we can manage everything ourselves.

So let’s go for it.

Install OpenMeetings on Ubuntu 20.04 / 18.04

One of the advantages of OpenMeetings is that it’s made in Java with all that that implies. That is, robustness, stability, and that Java is cross-platform so it works on almost any system. So the first step is to install Java.

1.- Install some required packages and Java on Ubuntu 20.04 / 18.04

Before installing Java, it is convenient to install some dependencies first. So open a terminal session or connect to your server and run the following command:

:~$ sudo apt install imagemagick ghostscript libxt6 libxrender1 ffmpeg sox

These packages increase the capabilities of OpenMeetings.

Then we can install Java. The easiest and safest option is to use OpenJDK which is in the Ubuntu repositories. This Open-source implementation of Java is the same but with a more permissive license.

To install it execute the following command:

:~$ sudo apt install openjdk-11-jre
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  at-spi2-core ca-certificates-java fontconfig-config fonts-dejavu-core fonts-dejavu-extra java-common libasound2 libasound2-data libatk-bridge2.0-0
  libatk-wrapper-java libatk-wrapper-java-jni libatk1.0-0 libatk1.0-data libatspi2.0-0 libavahi-client3 libavahi-common-data libavahi-common3 libcups2 libdrm-amdgpu1
  libdrm-common libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libdrm2 libfontconfig1 libfontenc1 libgif7 libgl1 libgl1-mesa-dri libglapi-mesa libglvnd0 libglx-mesa0
  libglx0 libice6 libjpeg-turbo8 libjpeg8 liblcms2-2 libllvm9 libnspr4 libnss3 libpciaccess0 libpcsclite1 libsensors4 libsm6 libx11-xcb1 libxaw7 libxcb-dri2-0
  libxcb-dri3-0 libxcb-glx0 libxcb-present0 libxcb-shape0 libxcb-sync1 libxcomposite1 libxdamage1 libxfixes3 libxft2 libxi6 libxinerama1 libxmu6 libxpm4 libxrandr2
  libxrender1 libxshmfence1 libxt6 libxtst6 libxv1 libxxf86dga1 libxxf86vm1 openjdk-11-jre-headless x11-common x11-utils
Suggested packages:
  default-jre libasound2-plugins alsa-utils cups-common liblcms2-utils pcscd lm-sensors libnss-mdns fonts-ipafont-gothic fonts-ipafont-mincho fonts-wqy-microhei
  | fonts-wqy-zenhei fonts-indic mesa-utils
The following NEW packages will be installed:
  at-spi2-core ca-certificates-java fontconfig-config fonts-dejavu-core fonts-dejavu-extra java-common libasound2 libasound2-data libatk-bridge2.0-0
  libatk-wrapper-java libatk-wrapper-java-jni libatk1.0-0 libatk1.0-data libatspi2.0-0 libavahi-client3 libavahi-common-data libavahi-common3 libcups2 libdrm-amdgpu1
  libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libfontconfig1 libfontenc1 libgif7 libgl1 libgl1-mesa-dri libglapi-mesa libglvnd0 libglx-mesa0 libglx0 libice6
  libjpeg-turbo8 libjpeg8 liblcms2-2 libllvm9 libnspr4 libnss3 libpciaccess0 libpcsclite1 libsensors4 libsm6 libx11-xcb1 libxaw7 libxcb-dri2-0 libxcb-dri3-0
  libxcb-glx0 libxcb-present0 libxcb-shape0 libxcb-sync1 libxcomposite1 libxdamage1 libxfixes3 libxft2 libxi6 libxinerama1 libxmu6 libxpm4 libxrandr2 libxrender1
  libxshmfence1 libxt6 libxtst6 libxv1 libxxf86dga1 libxxf86vm1 openjdk-11-jre openjdk-11-jre-headless x11-common x11-utils
The following packages will be upgraded:
  libdrm-common libdrm2
2 upgraded, 70 newly installed, 0 to remove and 57 not upgraded.
Need to get 68.3 MB of archives.
After this operation, 505 MB of additional disk space will be used.
Do you want to continue? [Y/n]

Finally, you can check the installed version:

:~$ java --version
openjdk 11.0.6 2020-01-14
OpenJDK Runtime Environment (build 11.0.6+10-post-Ubuntu-1ubuntu118.04.1)
OpenJDK 64-Bit Server VM (build 11.0.6+10-post-Ubuntu-1ubuntu118.04.1, mixed mode, sharing)

So, you can continue.

2.- Install and configure MariaDB (optional)

This step is optional because Apache OpenMeetings has an integrated database manager. However, it’s a good idea to rely on MariaDB or MySQL.

To install it, use the following command:

:~$ sudo apt install mariadb-server
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  galera-3 libaio1 libcgi-fast-perl libcgi-pm-perl libconfig-inifiles-perl libdbd-mysql-perl libdbi-perl libencode-locale-perl libfcgi-perl libhtml-parser-perl
  libhtml-tagset-perl libhtml-template-perl libhttp-date-perl libhttp-message-perl libio-html-perl libjemalloc1 liblwp-mediatypes-perl libmysqlclient20
  libterm-readkey-perl libtimedate-perl liburi-perl mariadb-client-10.1 mariadb-client-core-10.1 mariadb-common mariadb-server-10.1 mariadb-server-core-10.1
  mysql-common socat
Suggested packages:
  libclone-perl libmldbm-perl libnet-daemon-perl libsql-statement-perl libdata-dump-perl libipc-sharedcache-perl libwww-perl mailx mariadb-test tinyca
The following NEW packages will be installed:
  galera-3 libaio1 libcgi-fast-perl libcgi-pm-perl libconfig-inifiles-perl libdbd-mysql-perl libdbi-perl libencode-locale-perl libfcgi-perl libhtml-parser-perl
  libhtml-tagset-perl libhtml-template-perl libhttp-date-perl libhttp-message-perl libio-html-perl libjemalloc1 liblwp-mediatypes-perl libmysqlclient20
  libterm-readkey-perl libtimedate-perl liburi-perl mariadb-client-10.1 mariadb-client-core-10.1 mariadb-common mariadb-server mariadb-server-10.1
  mariadb-server-core-10.1 mysql-common socat
0 upgraded, 29 newly installed, 0 to remove and 54 not upgraded.
Need to get 24.1 MB of archives.
After this operation, 184 MB of additional disk space will be used.
Do you want to continue? [Y/n]

Then use the mysql_secure_installation script to assign a root password.

And finally, it creates the database and the new user dedicated to OpenMeetings.

:~$ sudo mysql -u root -p
>CREATE DATABASE openmeetingsdb;
> GRANT ALL PRIVILEGES ON openmeetingsdb.* TO 'openmeetings'@'localhost' IDENTIFIED BY 'userpss';
> FLUSH PRIVILEGES;
> exit;

3.- Download OpenMeetings on Ubuntu 20.04 / 18.04

Now we can start downloading OpenMeetings. To do this I’ll go to the /tmp/ folder and from there with the help of the wget command start the download.

:~$ cd /tmp/
:~$ wget http://www-eu.apache.org/dist/openmeetings/4.0.10/bin/apache-openmeetings-4.0.10.tar.gz

At the time of writing this post, the latest stable version is 4.0.10 so, first, check and modify the command.

Then, after downloading it, we have to create a folder where we will decompress the file. In my case, I’ve named it openmeetings.

:~$ mkdir openmeetings

Now, decompress the file and move the folder to /opt/

:~$ sudo tar xvf apache-openmeetings-4.0.10.tar.gz -C openmeetings/
:~$ sudo mv openmeetings /opt/

Now access the folder where it is installed and start the server. It will take a while depending on the computer:

:~$ cd /opt/openmeetings
:~$ sudo sh red5.sh openmeetings

Then we can complete the installation from the program’s web interface.

4.- Install OpenMeeting on Ubuntu 20.04 / 18.04

Now you have to complete the installation from the web interface. To do this, open your favorite web browser and go to the following address:

http://your-server-ip:5080/openmeetings

Of course, it replaces the corresponding value. Or the DNS.

You’ll see the following:

Next, press the “>” button.

Now, you will see the database configuration screen. Select MariaDB /MySQL and type the credentials.

Now, create the admin user and Group. Then press the “>” button.

Then, set up some settings for OpenMeetings.

Now it’s the converters’ turn. To do this, write down the routes for each of them. And then click on the > button.

Keep configuring the software. This time with red5SIP configuration.

The next step is to complete the installation.

If everything went well, you will see the following screen.

So, log in and start to use the application.

So, enjoy it.

Conclusion

Within an organization or educational environment, communication plays an important role. And thanks to OpenMeetings you can deploy a server that allows you to have meetings and chat, manage it and share files. Today you have learned how to install this tool on a Ubuntu 20.04 / 18.04 server.

Please share this post and join our Telegram channel.

The post How to install OpenMeetings on Ubuntu 20.04 / 18.04? appeared first on Linux Windows and android Tutorials.

According to its website, WPScan is a free, for non-commercial use, black box WordPress vulnerability scanner. It is written for security professionals and blog maintainers to test the security of their sites. Normally, WPScan comes pre-installed on operating systems specifically geared towards security audits.

Of course, this tool is Open Source so we can examine its source code to learn more. In addition, it is possible to access more information about it on its Github site. The requirements are Ruby, Git, Curl, and RubyGems.

So let’s install WPScan on Ubuntu 20.04/ 18.04.

Update the System

The first step is to update the system. So open a terminal and run the following command.

:~$ sudo apt update && sudo apt upgrade -y

Once the system has finished installing the security patches, you will have a more stable and robust system.

Install some required packages

The next step to install WPScan on Ubuntu 20.04 / 18.04, is to get some packages that are necessary for the installation. Some of them are libraries and others are applications as such.

:~$ sudo apt install curl git libcurl4-openssl-dev make zlib1g-dev gawk g++ gcc libreadline6-dev libssl-dev libyaml-dev libsqlite3-dev sqlite3 autoconf libgdbm-dev libncurses5-dev automake libtool bison pkg-config ruby ruby-bundler ruby-dev

So, you can now install WPScan.

Install WPScan on Ubuntu 20.04 / 18.04

Now you start the installation process. For this, you will use RubyGems.

:~$ sudo gem install wpscan

So, that’s it.

Basic usage of WPScan

Using WPScan is quite simple. To make a scan on a website, the following command is enough:

:~$ wpscan --url [url]

It is also possible to add some extra options through text files. These are the files:

• ~/.wpscan/cli_options.json
• ~/.wpscan/cli_options.yml

And to know in depth the use of the command, it is advisable to read its help from the terminal:

:~$ wpscan --help

So, enjoy it.

Conclusion

WPScan is an important tool in the security of websites built with WordPress. Its basic use is within everyone’s reach, but the information it shows is very complete. So it’s something you should always keep in mind.

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

The post How to install WPScan on Ubuntu 20.04/ 18.04? appeared first on Linux Windows and android Tutorials.

Firebird is a relational database management system written in C++, open–source and based on Interbase version 6. It uses SQL language which makes its learning curve quite low. It is less known than the highly popular MySQL / MariaDB but also used in large projects for its efficiency.

On the other hand, some of the features of the application are the following:

• It is scalable
• Support the Client/Server architecture by TCP protocol.
• Many drivers are available for various programming languages such as PHP, Java or C++.
• Quite secure in user management.
• Cross-platform. With installable binaries for Windows, Linux, BSD, Solaris, and others.

So I will teach you how to install it and we will take the opportunity to do some small tests with the application.

Install Firebird on Ubuntu 20.04 / 18.04

The version that is available in the official Ubuntu 18.04 repositories includes Firebird. But the included version is quite old and does not take advantage of the new features of the recent versions as the correction of quite critical bugs.

In the case of Ubuntu 20.04 already Firebird 3 is in the official repositories. That is, nothing needs to be added.

Only for Ubuntu 18.04:

Fortunately, we have a dedicated repository for Ubuntu 18.04, so let us get to work.

Open a terminal session or connect to your server using SSH and add the repository.

:~$ sudo add-apt-repository ppa:mapopa/firebird3.0

After it is added. Refresh the APT cache and install the necessary packages:

:~$ sudo apt update

For Ubuntu 20.04 / 18.04:

:~$ sudo apt firebird3.0-server

During installation, you will be informed that the default user is “SYSDBA”. Define a password for this main user. It has to be quite secure.

Once you have defined the password. All you have to do is reconfigure the package so that all the changes are properly applied.

:~$ sudo dpkg-reconfigure firebird3.0-server

And it is ready to use.

Working with Firebird on Ubuntu 20.04 / 18.04

To enter the Firebird administration console and start using commands, just execute:

:~$ sudo isql-fb

With this we will be able to execute commands. And to get out just use this other one:

> quit;

Before starting to create databases and tables, it is necessary to talk about one thing. Firebird can store and access your databases from anywhere SQLite style, but can also restrict the location of them.

To make it accessible from anywhere or from a specific directory, just edit its configuration file:

:~$ sudo nano /etc/firebird/3.0/firebird.conf

Leave it as it is in the image to allow access to the database from any directory. There you can set a restriction to a particular directory.

Save the changes and close the file. Then, to apply the changes, just restart the service.

:~$ sudo systemctl restart firebird3.0

Creating databases and tables

Now we can start creating new databases and tables.

First we connect again to the Firebird shell.

:~$ sudo isql-fb

And then, we proceed to create the new database with the following syntax:

:> create database ["database_path.fdb"] user ['user']password '[password]';

For example:

:> create database "/var/lib/firebird/3.0/data/first_database.fdb" user 'SYSDBA' password 'angelo123';

Then, to use it or rather to connect to it we use this other command:

:> connect "/var/lib/firebird/3.0/data/first_database.fdb" user 'SYSDBA' password 'angelo123';

Now we’re ready to start creating tables.

For this example I will create a table with only two fields.

:> CREATE TABLE STUDENT (ID INT NOT NULL PRIMARY KEY, NAME VARCHAR(25));

So, you can show all the tables by using this command:

:> show tables;

Now, I am going to insert some data. Just use the following command:

:> INSERT INTO STUDENT VALUES (1, 'Angelo');

And get the data:

:> select * from STUDENT;

As you can see being SQL language, the commands and operations are similar to MySQL / MariaDB and PostgreSQL.

Finally, you can show the installed version:

:> show version;

And that is it.

Conclusion

Firebird may not be popular but is considered by many projects for its efficiency. Being of the SQL family its commands are not so different from those of other better known programs such as MySQL or MariaDB. So we only have to work with it.

Share this post and join our Telegram Channel.

The post How to install Firebird on Ubuntu 20.04/ 18.04? appeared first on Linux Windows and android Tutorials.

R Language and RStudio

RStudio is an IDE created especially for the R programming language. Its mission is to provide a statistical computing environment for R allowing analysis and development for anyone to analyze data with the language. As expected, it has all the common characteristics of an IDE.

Some of the features of RStudio are as follows:

• Syntax highlighting.
• Code debugging.
• Integrated documentation and support.
• Management of various folders and workspaces.

However, other possibilities can be done with RStudio. For example, with RStudio you can do many data analyses relatively quickly.

RStudio is available for Windows, Mac, and Linux which makes it cross-platform and open source with the AGPL license.

Install RStudio on Ubuntu 20.04 / 18.04

RStudio is just an application to take advantage of all the potential of R. Everything from a comfortable graphic interface made in QT.

This leads to the conclusion that we must first install the R language in this system before continuing.

To do this follow our instructions in this post

How to install R programming language on Ubuntu?

Once R is correctly installed, we can start the installation.

RStudio is not available from the official Ubuntu or Linux Mint repositories, but this does not mean that we cannot install it.

To do it first, you have to download the package for Ubuntu 18.04 from the RStudio website.

If you want to do it from a terminal (faster and more efficient) you can type the following command:

:~$ wget https://download1.rstudio.org/desktop/bionic/amd64/rstudio-1.2.5042-amd64.deb

Once you download it, you have to install it. Since this package has some extra dependencies that you probably don’t have installed, you can use gdebi to install it.

If you do not have gdebi installed, you can use the following command:

:~$ sudo apt install gdebi

Once installed, now you do install RStudio on Ubuntu 18.04 / Linux Mint 19.x with the following command:

:~$ sudo gdebi rstudio-1.2.5042-amd64.deb

After some time installing the program, it will be available to run.

So, enjoy it.

Conclusion

RStudio is a vital application for working with R. It is used by many scientific and data analysis institutes that do very important mathematical tasks for society. So we are talking about a very important program for the world.

RStudio has paid versions that further increase the potential of it, but in the end it all comes down to potential.

Please share this post and join our Telegram Channel.

The post How to install RStudio on Ubuntu 20.04 / 18.04 appeared first on Linux Windows and android Tutorials.