UNIX for Dummies Questions & Answers

02.05.2014
10.05.2014
17.09.2014

12.03.2013 -ne 02.05.2014
12.03.2013 -ne 10.05.2014
12.03.2013 -ne 17.09.2014

#!/bin/ksh
echo "Please enter  start date:"
read startdate
#/usr/xpg4/bin/awk -F, '{print $1}' inputfile >> file
if[[${startdate} -ne $(awk -F, '{print $1}' file)]]
then
echo "date is not valid"
fi

if grep $startdate file

if grep -q "^$startdate$" file
then
   echo "date is not valid"
fi

#!/bin/ksh
echo "Please enter  start date:"
read startdate
correctdate=$(echo $startdate|sed 's/[^0-9][^0-9]*/\./g')
awk -vd="$correctdate" '$1==d{print "equal-Line Number " NR;x=1}
END{if(!x)print "date is not valid"}' your.txt

# ./code
Please enter  start date:
5/5/5
date is not valid

# ./code
Please enter  start date:
10.05.2014
equal-Line Number 2