How To Install qpdf on Ubuntu 20.04
Introduction
In this tutorial we learn how to install qpdf on Ubuntu 20.04.
What is qpdf
qpdf is:
QPDF is a program that can be used to linearize (web-optimize), encrypt (password-protect), decrypt, and inspect PDF files from the command-line. It does these and other structural, content-preserving transformations on PDF files, reading a PDF file as input and creating a new one as output. It also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work.
QPDF understands PDF files that use compressed object streams (supported by newer PDF applications) and can convert such files into those that can be read with older viewers. It can also be used for checking PDF files for structural errors, inspecting stream contents, or extracting objects from PDF files. QPDF is not PDF content creation or viewing software – it does not have the capability to create PDF files from scratch or to display PDF files.
This package includes the command-line qpdf tools. It also contains the documentation.
Package: qpdf Architecture: amd64 Version: 9.1.1-1build1 Priority: optional Section: universe/text Origin: Ubuntu Maintainer: Ubuntu Developers [email protected] Original-Maintainer: Jay Berkenbilt [email protected] Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 1206 Depends: libc6 (>= 2.14), libgcc-s1 (>= 3.0), libqpdf26 (» 9.1~), libstdc++6 (>= 9) Filename: pool/universe/q/qpdf/qpdf_9.1.1-1build1_amd64.deb Size: 475608 MD5sum: 4a541e8b172388e001eb70cdbfc8a2aa SHA1: 46ee68be915023cfd6f2c5fd58c82c508a5ffdc7 SHA256: d29b385ecbaba025f72c8b999e473b8ad6c44792473da3a795fcc2d1f014695a Homepage: http://qpdf.sourceforge.net Description-en: tools for transforming and inspecting PDF files QPDF is a program that can be used to linearize (web-optimize), encrypt (password-protect), decrypt, and inspect PDF files from the command-line. It does these and other structural, content-preserving transformations on PDF files, reading a PDF file as input and creating a new one as output. It also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work.
QPDF understands PDF files that use compressed object streams (supported by newer PDF applications) and can convert such files into those that can be read with older viewers. It can also be used for checking PDF files for structural errors, inspecting stream contents, or extracting objects from PDF files. QPDF is not PDF content creation or viewing software – it does not have the capability to create PDF files from scratch or to display PDF files.
This package includes the command-line qpdf tools. It also contains the documentation.
There are three methods to install qpdf on Ubuntu 20.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install qpdf Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install qpdf using apt-get by running the following command:
sudo apt-get -y install qpdf
Install qpdf Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install qpdf using apt by running the following command:
sudo apt -y install qpdf
Install qpdf Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install qpdf using aptitude by running the following command:
sudo aptitude -y install qpdf
How To Uninstall qpdf on Ubuntu 20.04
To uninstall only the qpdf package we can use the following command:
sudo apt-get remove qpdf
Uninstall qpdf And Its Dependencies
To uninstall qpdf and its dependencies that are no longer needed by Ubuntu 20.04, we can use the command below:
sudo apt-get -y autoremove qpdf
Remove qpdf Configurations and Data
To remove qpdf configuration and data from Ubuntu 20.04 we can use the following command:
sudo apt-get -y purge qpdf
Remove qpdf configuration, data, and all of its dependencies
We can use the following command to remove qpdf configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge qpdf
References
Summary
In this tutorial we learn how to install qpdf package on Ubuntu 20.04 using different package management tools: apt, apt-get and aptitude.