IRAF – Image Reduction and Analysis Facility, is a product of NOAO. It has been widely used in the astronomical community to reduce data in the form of images and spectra.
IRAF works best in UNIX distribution.
Before setting out to install IRAF in your device, find out if your OS is 64 bit or 34 bit.
You can do this by entering the following commands :
$ sudo -s #( specify your user password)
$ uname -m # this will tell you if its 64 bit or 32 bit