Best to have as many as possible. However usually 3
Answer:
When there's a comparison between binary files with diff, there's a message from the utility that says there's a difference when the files differ or there's no message when the two are same. ASCII files comparison is made by the diff utility line-by-line. there's no provision to make comparisons on a byte by byte basis. in that case use cmp.
Explanation:
Especially if it's important if you click out of the document by accident without saving it you will lose it and never be able to retrieve it again. So it is necessary to save it so that you'll always be able to have it and find it.
Answer:
just follow it's own formula
