How to install Okular Pdf Viewer on Ubuntu and any Debian-based distro

How to install Okular Pdf Viewer on Ubuntu and any Debian-based distro


How to install Okular Pdf Viewer on Ubuntu and any Debian-based distro

Pre steps

  • Check your operating system;

  • Check if your operating system is Debian-based.

Check your OS


The command "lsb_release -a" is used to display information about the Linux Standard Base (LSB) and distribution-specific information of your Linux system.

The "lsb_release" command is useful for identifying the distribution and its version in a standardized manner, particularly if you are writing scripts or need to retrieve distribution information programmatically.

In the terminal

lsb_release -a

The output should be something like this

No LSB modules are available.
Distributor ID: Deepin
Description:    Deepin 20.7.1
Release:        20.7.1
Codename:       apricot


The command "cat /etc/os-release" is used to display the contents of the "/etc/os-release" file, which contains information about the operating system distribution.

The "/etc/os-release" file is commonly used by various system utilities and scripts to determine the distribution and retrieve specific information about the operating system.

In the terminal

cat /etc/os-release

Your output should be something like this

PRETTY_NAME="Deepin 20.7.1"

Debian-based distro

In the terminal

cat /etc/debian_version



  • Install via apt;

  • Confirm installation;

  • Run it.

Install via apt

In Linux, apt (short for Advanced Package Tool) is a command-line package management system commonly used in Debian-based distributions, such as Ubuntu.

It provides a convenient and simplified way to install, upgrade, and remove software packages from the command line, making it an essential tool for system administration and software management.

In the terminal

sudo apt install okular

Initial output

Confirm installation via which

The "which" command in Linux is used to locate the executable file associated with a given command or program. It helps you determine the path to the binary file that will be executed when you run a particular command.

When you run the "which" command followed by the name of a command, it searches the directories listed in the "PATH" environment variable to find the corresponding executable file.

In the terminal

which okular



Confirm installation via dpkg

The "dpkg -s" command is useful for checking the status of a specific package, verifying its installation, and retrieving detailed information about it, including its version and description.

dpkg -s okular

Initial output

Package: okular
Status: install ok installed
Priority: optional
Section: graphics
Installed-Size: 13132
Maintainer: Debian Qt/KDE Maintainers <>
Architecture: amd64
Version: 4:17.12.2-2.2+rb1


okular & disown


"okular" is the command to launch the Okular document viewer application.

The "&" symbol at the end of the command tells the shell to run Okular in the background, allowing you to continue using the terminal.

"disown" is used to detach the Okular process from the terminal session. This prevents the process from being terminated when you close the terminal.

After running this command, Okular should launch in the background, and you can continue using the terminal for other commands without Okular's output or messages interfering.

Be happy

You got here. Way to go!

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Final thoughts

I hope this article helped you. Let me know if you have any questions. Your thoughts, suggestions and corrections are more than welcome. By the way, feel free to drop your suggestions on new blog articles.

Hope to see you next time.