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#!/bin/bash

val=0
while read line
do
cur=$( date -d "${line%%,*}" '+%s' )
test "$cur" -gt "$val" && val=$cur
done < infile

date -d @$val '+%d %b %Y %T'
--ahamed

s/.*/read='&' or/g
Replace everything with the format you want. '&' will have the entire search string.

$ {s/or//g}
You dont want the "or" at the end of the last line right? So, when the last...

Try this...

sed "s/.*/read='&' or/g;$ {s/or//g}" infile


--ahamed

while read x; do echo "reader='$x' or"; done < inputfile

sed -e "s/^/reader='/g" -e "s/$/' or/g" inputfile

$# --> Refers to the number of parameters provided at command line alongside scriptname.
[ $# -ne 2 ] --> Number of parameters ($#) is not equal (-ne) to two (2)
&& --> Logical 'and' operator....

In the first parameter why did you give milliseconds? -- 26 Dec 2011 11:39:43,070
That was not your original requirement right? Anyway, that shouldn't matter.

Post the output of the following...