Shell Programming and Scripting

#!/bin/ksh
echo "enter a file name"
read a
cd /home/linux1/sam
if [ -e $a ]
then
echo "file exists"
cp $a $a_bkp
else
echo "file doesn't exist"
fi

enter a file name
contact
file exists
cp: missing destination file
Try `cp --help' for more information.

#!/bin/ksh

dir=/home/linux1/sam

echo "enter a file name"
read a
cd $dir
if [ -e $a ]
then
echo "file exists"
cp -p $a $dir/"$a"_bkp
else
echo "file doesn't exist"
fi

cp $a $a_bkp

$ read a; [ -e "$a" ] && echo "File exists" && cp $a ${a}_bkp || echo "File not exists"