Install Optic Slim 2400+ on Ubuntu or any other linux

Easy to use scan app for linux  simple-scan can be used for scanning on linux

Here is how to make it run with Optic Slim 2400+ scanner

Install sane 

sudo apt-get install sane

Create scanner dir in sane shareed location:

sudo mkdir -p /usr/share/sane/gt68xx

Copy cis3R5B1.fw file to /usr/share/sane/gt68xx/

sudo cp cis3R5B1.fw usr/share/sane/gt68xx

Now open simple scan app - that's it !