Diffing with the current version

Let's say you did something to the program, and now it is not working anymore. It is often helpful to know exactly what you have done since you last checked in the file. To do this, type the following command:

rcsdiff project1.c

The RCS system spills out a bunch of text that may seem difficult to understand. To make it a little easier, use the following command instead (so that you can at least page up/down the output):

rcsdiff project1.c | less

Now, let's see how we can read the jibberish output.