#!/bin/bash
#---------- CONFIG ----------------------
log="test.log"
startdate="Mar 23 15:42:00"
enddate="Mar 23 15:44:01"
#----------------------------------------
d=$startdate
d=${d//[- :]/|}
IFS="|"
set -- $d
# $1 = Mar, $2 = 23, stb
startd=$2$3$4
d=$enddate
d=${d//[- :]/|}
IFS="|"
set -- $d
endd=$2$3$4
while read line
do
d=$line
d=${d//[- :]/|}
IFS="|"
set -- $d
curdate=$2$3$4
if [[ "$curdate" -ge "$startd" && "$curdate" -le "$endd" ]] ; then
echo $line
fi
done < $log