XSANE is a front-end for the SANE (Scanner Access Now Easy). You can install the program from the Synaptic Package Manager or from the command line via apt-get install xsane. When the installation is complete, you will find the program under Applications -> Graphics -> XSane Image Scanner.

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To avoid problems during set up, I suggest you plug in your scanner first and make sure that it is properly recognized and working before you fire up XSANE.
XSANE is a very simple yet a powerful program. As you see in the screenshot, you just set the basic configuration options and hit the “Scan” button to scan your image. Before you start scanning, I suggest you change the directory where scanned images will be saved. In the screenshot, it shows /home/oli/out.pnm, but it is better if you change it to something like /home/your_user_name/Scanned_Images (I learned this from experience. I used the default “Photos” folder and it quickly became a mess).
XSANE can also be called from inside GIMP. If you have GIMP installed then installing the xsane package installs the GIMP plug-in. You can go to File -> Acquire -> Xsane and transfer your photos from your scanner directly to GIMP.