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Best 5 Free and Open-Source eBook Readers

This article covers eBook software applications which are free and open-source. EBook reader applications have seen a rise in recent times. Many people have acquired the means to feed their book-reading habits via kindle, mobiles, or desktops to take their minds off from their busy work schedules and daily routines. In the rapidly advancing world, taking time to go to book shops, buying books, and then taking further time out from the packed schedules to read the books is not an option for many. Therefore, eBooks have been widely adopted by many across the globe. 

You can easily open and read eBook in a variety of formats in these software. The most commonly supported eBook formats in these software include EPUB, Mobipocket, LIT, PDF, HTML, RTF, Plain Text, Comic books, etc. These software provide all essential tools which are required to enhance the overall eBook reading experience. These tools basically include search text, page navigations, go to, zoom in/ out, single page and dual page view modes, rotate, fullscreen view, scrolling options, night view mode, etc. Additionally, you can also view Table of Content and Bookmarks in these software to navigate to specific chapter or section in an eBook.

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Clear Apt Cache on Ubuntu 20.04 - Best Method ?

This article covers the best method of listing and cleaning the apt cache on your Ubuntu system. Ubuntu users can clean Apt archive cache using sudo apt-get clean and sudo apt-get autoclean commands. The apt-get is a APT package handling utility or the command-line tool for handling packages. These commands clears out the local repository. The autoclean command only removes packages and files that are no longer in use. Ubuntu users can also do the same task from Synaptic package manager. Open Synaptic, go to Settings > Preferences > File tab. Select to delete packages that are no longer in use.

To clean Apt archive cache folder on Ubuntu, run:

$ sudo apt-get update
$ sudo apt-get clean
$ sudo apt-get autoclean


  • clean – clean clears out the local repository of retrieved package files. It removes everything but the lock file from /var/cache/apt/archives/ and /var/cache/apt/archives/partial/.
  • autoclean – Like clean, autoclean clears out the local repository of retrieved package files. The difference is that it only removes package files that can no longer be downloaded, and are largely useless. This allows a cache to be maintained over a long period without it growing out of control. The configuration option APT::Clean-Installed will prevent installed packages from being erased if it is set to off.

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Install VNC Server on Ubuntu 20.04 - Best Method ?

This article covers how to install and configure VNC Server on Ubuntu 20.04. Virtual Network Computing, or VNC, is a connection system that allows you to use your keyboard and mouse to interact with a graphical desktop environment on a remote server. It makes managing files, software, and settings on a remote server easier for users who are not yet comfortable with the command line.

After connecting to your server with SSH, update your list of packages:

$ sudo apt update

Now install Xfce along with the xfce4-goodies package, which contains a few enhancements for the desktop environment:

$ sudo apt install xfce4 xfce4-goodies

Once that installation completes, install the TightVNC server:

$ sudo apt install tightvncserver

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Install Swift on Ubuntu 20.04 - Best Method ?

This article covers how to install Swift on Ubuntu 20.04 LTS. Swift is a programming language developed from C and objective-C which uses variables to store and refer to values. Constants are used throughout.

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Install qbittorrent on Ubuntu 20.04 - Best Method ?

This article covers the process of Installing qBittorrent on Ubuntu 20.04. For more information, visit their official site https://www.qbittorrent.org.


Main feautures of qBittorrent:

  • An interface similar to uTorrent
  • DHT, peer exchange, and complete encryption are all supported by this BitTorrent client.
  • It has a well-integrated search engine.
  • It also has UPnP port forwarding and NAT-PMP capabilities.
  • You can also use the qBittorrent Web interface to control it remotely.
  • A search engine that is well-integrated and expandable.
  • IPv6 compliant.

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Start, Stop or Restart Services in Linux Mint 20 - Best Method ?

This article covers the basics of service management in Linux Mint 20. Linux provides fine-grained control over system services through systemd, using the systemctl command. Services can be turned on, turned off, restarted, reloaded, or even enabled or disabled at boot.

The basic syntax for using the systemctl command is:

$ systemctl [<em>command</em>] [<em>service_name</em>]

Typically, you'll need to run this as a superuser with each command starting with sudo.


How to Restart a Service ?

To stop and restart the service in Linux, use the command:

$ sudo systemctl restart <em>SERVICE_NAME</em>

After this point, your service should be up and running again. You can verify the state with the status command.

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