Shell Programming and Scripting

awk '
NR<=6{print > "file1"; next}
NR<=16{print > "file2"; next}
{print > "file3"}
' file

#!/usr/bin/env bash

# @(#) s1	Demonstrate splitting a file based on line numbers.

pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C sed

FILE=${1-data1}

rm -f file file1 file2

sed -n \
-e "1,6w file" \
-e "7,16w file1" \
-e "17,20w file2" \
$FILE

pl " Sample results, file2:"
cat file2

exit 0

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39
sed GNU sed version 4.1.5

-----
 Sample results, file2:
117
118
119
120