For installation instructions see the Section called Installing Diffutils-2.8.1 in Chapter 6.
Diffutils (2.8.1):
ftp://ftp.gnu.org/gnu/diffutils/
(Last checked against version 2.8.1.)
The programs from this package show you the differences between two files or directories. It's most common use is to create software patches.
Installed programs: cmp, diff, diff3 and sdiff
cmp compares two files and reports whether or in which bytes they differ.
diff compares two files or directories and reports which lines in the files differ.
diff3 compares three files line by line.
sdiff merges two files and interactively outputs the results.
(Last checked against version 2.7.)
Bash: sh
Binutils: ld, as
Coreutils: cat, chmod, cp, date, hostname, install, mv, rm, tr
Diffutils: cmp
GCC: cc1, collect2, cpp, gcc
Grep: egrep, grep
Make: make
Sed: sed