Canon MG6440 / MG6450 Printer Quick Start for Ubuntu
You are Welcome! The Tutorial shows you Step-by-Step How to Install the Canon MG6440 / MG6450 PIXMA Printer Drivers on Ubuntu 16.04 Xenial Xerus LTS Desktop.
Included in the Canon Printer Installation Tutorial for Ubuntu you find also detailed instructions on How to Get Started with Canon Scanning on Ubuntu.

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Open a Shell Terminal emulator window
Ctrl+Alt+t on Desktop
(Press “Enter” to Execute Commands) -
Download Canon MG6440 / MG6450 Ubuntu Driver
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Double-Click/Right-Click & Open with Archive Manager
And Extract into the /tmp directory: -
Checking/Installing GDebi Package Installer:
which gdebi
If Not there then:
sudo apt-get install gdebi gdebi-core
If Got “User is Not in Sudoers file” then see: How to Enable sudo
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Install the Canon Packages with:
cd /tmp/cnijfilter*deb/packages
For 32-bit Systems:
sudo gdebi ./*i386.deb
For 64-bit Systems:
sudo gdebi ./*amd64.deb
In case of Installation Issues see this Troubleshooting!
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Installing Canon MG6440 / MG6450 Printer Driver:
cd /tmp/cnijfilter*
Connect & Power On your Printer.
sudo ./install.sh
In case of Installation Issues see this Troubleshooting!
Now in case of Issue then try first to execute:cd packages
sudo apt-get install gdebi gdebi-core
For 32-bit Systems:
sudo gdebi ./*i386.deb
For 64-bit Systems:
sudo gdebi ./*amd64.deb
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Finally, Go on System Settings to Add Printer
And the Printer will be Recognized and Installed -
Getting-Started with Canon MG6440 / MG6450 Scanner on Ubuntu
Ubuntu Canon MG6440 / MG6450 Scanner Quick Start