Grep (2.4.2):
ftp://ftp.gnu.org/gnu/grep/
egrep, fgrep and grep
egrep prints lines from files matching an extended regular expression pattern.
fgrep prints lines from files matching a list of fixed strings, separated by newlines, any of which is to be matched.
grep prints lines from files matching a basic regular expression pattern.
Grep-2.4.2 needs the following to be installed:
bash: sh
binutils: ar, as, ld
diffutils: cmp
fileutils: chmod, cp, ln, ls, mkdir, rm
gcc: cc
grep: egrep, grep
make: make
sed: sed
sh-utils: basename, expr, sleep, uname
textutils: cat, tr