There are Debian & RPM packages of pqChecker, to download from the download section.
The source code is available to anonymous download on Github website.
This is available for Debian/Ubuntu & Redhat/CentOS and compliants systems.
The installation procedure is done through the dpkg or rpm utility. The downloaded archive contains the .deb or .rpm package, required for installation. It contains also a README text file that contains the instructions to complete this procedure. Especially:
sudo rpm -iv pqcheckerxxxxxxx.rpm # Install pqChecker
sudo dpkg -r pqchecker
sudo rpm -ev pqchecker # Uninstall it
Available for POSIX system, but only for native binary pqchecker.so.
The tools of software's build must be installed first: gcc, make .. Obtain the source archive of the target version, or get them from the git source repository.
git checkout v1.1.0 # provides the sources of this stable version
The INSTALL file contains all the instructions to complete this operation. Especially:
make install # allows pqChecker installation
make uninstall # allows its uninstallation