How to input text on every 2nd line?

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LEARN ABOUT MOJAVE

cmp

CMP(1)								   User Commands							    CMP(1)

NAME

       cmp - compare two files byte by byte

SYNOPSIS

       cmp [OPTION]... FILE1 [FILE2 [SKIP1 [SKIP2]]]

DESCRIPTION

       Compare two files byte by byte.

       -b  --print-bytes
	      Print differing bytes.

       -i SKIP	--ignore-initial=SKIP
	      Skip the first SKIP bytes of input.

       -i SKIP1:SKIP2  --ignore-initial=SKIP1:SKIP2

	      Skip the first SKIP1 bytes of FILE1 and the first SKIP2 bytes of FILE2.

       -l  --verbose
	      Output byte numbers and values of all differing bytes.

       -n LIMIT  --bytes=LIMIT
	      Compare at most LIMIT bytes.

       -s  --quiet  --silent
	      Output nothing; yield exit status only.

       -v  --version
	      Output version info.

       --help Output this help.

       SKIP1  and  SKIP2  are  the number of bytes to skip in each file.  SKIP values may be followed by the following multiplicative suffixes: kB
       1000, K 1024, MB 1,000,000, M 1,048,576, GB 1,000,000,000, G 1,073,741,824, and so on for T, P, E, Z, Y.

       If a FILE is `-' or missing, read standard input.

AUTHOR

       Written by Torbjorn Granlund and David MacKenzie.

REPORTING BUGS

       Report bugs to <bug-gnu-utils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.

       This program comes with NO WARRANTY, to the extent permitted by law.  You may redistribute copies of this program under the  terms  of  the
       GNU General Public License.  For more information about these matters, see the file named COPYING.

SEE ALSO

       The  full  documentation  for cmp is maintained as a Texinfo manual.  If the info and cmp programs are properly installed at your site, the
       command

	      info diff

       should give you access to the complete manual.

diffutils 2.8.1 						    April 2002								    CMP(1)

Shell Programming and Scripting