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How to install XSANE in Ubuntu

sudo apt install xsane
You must install the mono package to complete the scanner installation
Ubuntu 20.04
Ubuntu 18.04
Ubunt 16.04
sudo apt install gnupg ca-certificates
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo "deb https://download.mono-project.com/repo/ubuntu stable-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
sudo apt update
sudo apt install gnupg ca-certificates
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo "deb https://download.mono-project.com/repo/ubuntu stable-bionic main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
sudo apt update
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
sudo apt install apt-transport-https ca-certificates
echo "deb https://download.mono-project.com/repo/ubuntu stable-xenial main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
sudo apt update
Once the apt repository is enabled , update the packages list and install Mono with:
sudo apt update
sudo apt install mono-complete
Verify the installation by typing the following command which will print the Mono version:
mono --version

Identify which scanner is used

scanimage -L

TO detect all USB's

lsusb

What to do in a situation where a simple scan does not open

Go to Home---->.Cache(view hidden files)------>Simple-scan
Delete the simple scan folder.This will clear the cache in that software and This will help to open the simple scan properly .

Installation of CANON PIXMA GM4070

Step1: Download and install IJ Printer Driver
Step 2: Download and install ScanGear
Step 3: Run the following command to add the PPA.
sudo add-apt-repository ppa:thierry-f/fork-michael-gruz
Step 4: Run the following command to install ScanGear MP in Ubuntu
sudo apt install scangearmp2

KODAK i2620 Scanner

Expand the file (e.g., tar -xf *.gz) and then run the setup script (i.e. sudo ./setup)
the following command must be entered in a terminal window:
sudo ln -sfr /usr/lib/sane/libsane-kds* /usr/lib/x86_64-linux-gnu/sane