Shell Programming and Scripting

#!/bin/ksh

InpFile=$1
OutFile="$HOME/my_output.txt"
pattern=$(head -1 $1 | sed 's/Header\([0-9-]\{10\}\)[0-9-]*/\1/');
sed "/Header/d;s/^/$pattern|/g" $InpFile > $OutFile

#!/bin/ksh

InpFile=$1
OutFile="$HOME/my_output.txt"
pattern=$(head -1 $1 | sed 's/Header\([0-9]\{4\}-[0-9]\{2\}-[0-9]\{2\}\)[0-9-]*/\1/' );
sed "/Header/d;s/^/$pattern|/g" $InpFile > $OutFile

$ >ksh -x hd.ksh head.txt
+ InpFile=head.txt
+ OutFile=/home/my_output.txt
+ head -1 head.txt
+ sed 's/Header\([0-9-]\{10\}\)[0-9-]*/\1/'
+ pattern=2007-12-01
+ sed '/Header/d;s/^/2007-12-01|/g' head.txt
+ 1> /home/my_output.txt

awk '{ if ( NR == 1 ) { x = substr($0, length("Header") + 1, 10) } else { $0 = x"|"$0; print } }' filename