Shell Programming and Scripting

Iam a learner of UNIX. Fortunately I got this site.
I want to check the file for its existance.

if [ ! -f filename_$Odate.dat ]
echo " Not present"
else
echo "Present"
fi

The above code is working fine. But I also want to check for the files which are compressed.
I tried the following code and it is not working:

if [ ! -f filename_$Odate.dat -o filename_$Odate.dat.Z ]
echo " Not present"
else
echo "Present"
fi

Please correct the syntax.

if [ ! -f filename_$Odate.dat || filename_$Odate.dat ]

try this one....

Add another '-f' test.

Code:

if [ ! -f filename_$Odate.dat -o -f filename_$Odate.dat ] ; then
echo " Not present"
else
echo "Present"
fi

I found one more logic, which will find both compressed and uncompressed file. Could any one check and advise me please?

File_Name=`ls -lrt filename_$Odate.dat.* | tail -1`
if [ ! -f $File_Name ]
echo " Not present"
else
echo "Present"
fi

Many Thanks and Regards,
Ganapati

This will list output in long format.

You just want the filename.

Instead, use ' ls -1rt '.

Thanks to all.