Sorry to resuscitate this 10 year old thread back to life, but I figured this would be the most relevant thread instead of starting a new one.
I am using ArcaOS and wanted to get the GNU diff utility working for a long time but was seemingly unable to locate a yum program called diff. Found this thread and saw Alex's comment about diff which suggested the program is indeed available. I just wanted to point out to anyone looking for diff, the program is only 384k and available under the name
diffutils.
You can install it with either the Arca Noae Package Manager or using this command line:
yum install diffutils
Finally, and works great.
