Shell Programming and Scripting

awk '$0 >= "Nov 14, 2013 9:40:01" && $0 <= "Nov 14, 2013 9:55:01"' file

sed -n '/Nov 14, 2013 7:58:00 PM UTC/,/Nov 14, 2013 8:10:00 PM UTC/p' file

awk -F'[ ,:]+' 'BEGIN {
        # Build tables so MON["Jan"] becomes 1, etc.
        split("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec", M);
        for(X in M) MON[M[X]]=X
        for(X=1; X<=11; X++) { T[X"AM"]=X ; T[X"PM"]=X+12 }
        T["12PM"]=12;        T["12AM"]=24; }

{ YYMMDD=sprintf("%04d %02d %02d %02d %02d %02d", $3, MON[$1], $2, T[$4 $7], $5, $6)); }

# YYMMDD is a timestamp directly comparable with <= >= against other YYMMDD dates.

...'

#!/bin/bash
#set -xv
# The script to verify the error from application logs
# Please don't edit this file

#removing the old scripting logs
rm /home/mydir/script/file.txt
rm /home/mydir/script/output

#date based on the log format
date=`date "+%b %-d, %Y"`

#Log Details
log1=application log file1*
log2=application log file2*
log3=application log file3*

#checking logs
more $log1 | grep -i "$date" | egrep -i 'error1 | error2 | error3 | error4 | error5' >> /home/mydir/script/file.txt
more $log2 | grep -i "$date" | egrep -i 'error1 | error2 | error3 | error4 | error5' >> /home/mydir/script/file.txt
more $log3 | grep -i "$date" | egrep -i 'error1 | error2 | error3 | error4 | error5' >> /home/mydir/script/file.txt

# Time stamp (based on the log format)

tot=`date "+%r %Z" | sed 's/^0//'`
to=`date "+%b %d, %Y"`

frmt=`date -d "-20 minutes" "+%r %Z" | sed 's/^0//'`
from=`date "+%b %-d, %Y"`

#collecting log output between two time stamp

awk '$0>=from && $0<=to' from="$from $frmt" to="$to $tot" /home/mydir/script/file.txt > /home/mydir/script/output

#email

email script

# END

###<Nov 6, 2013 8:30:23 PM UTC> <Notice> <stoutdf> <host name> < <[ACTIVE] ExecuteThread: