Hello

yes it is funny and you can delete the file with 0 suffix if you want
to
save space..
See the diff I have in the same dir..
521884 Apr 25 17:26 lsnrctl
530304 Dec 11 1999 lsnrctl0

But I have a single copy of dbsnmp
1432580 Apr 25 17:26 dbsnmp
and 2 copies of oracle
31975964 Apr 25 17:27 oracle
31975964 Apr 25 17:26 oracleO

Yet I have not deleted them as I have got enough space, so notto bother
about that.