[adimulamvenkat19851609@cxln4 ~]$ cat>hello.sh
#!/bin/bash
# Test File existence
echo "enter a filename"
read fileName
if [[ -f $fileName ]]
then
echo "File exists"
else
echo "File does not exist"
fi
[adimulamvenkat19851609@cxln4 ~]$ sh hello.sh
enter a filename
filegrep.txt
File exists
[adimulamvenkat19851609@cxln4 ~]$ sh hello.sh
enter a filename
hello.sh
File exists
[adimulamvenkat19851609@cxln4 ~]$ sh hello.sh
enter a filename
prabhu.txt
File does not exist