UNIX Command Question- How do I just extract line 'X'

[pdale]

HEAD(1) BSD General Commands Manual HEAD(1)

NAME
head -- display first lines of a file

SYNOPSIS
head [-n count] [file ...]

DESCRIPTION
This filter displays the first count lines of each of the specified
files, or of the standard input if no files are specified. If count is
omitted it defaults to 10.

If more than a single file is specified, each file is preceded by a
header consisting of the string ``==> XXX <=='' where ``XXX'' is the name
of the file.