```
test `find /mnt/backups/mysql/information_schema-20120521-*.sql -type f -mmin -1500`

```

I am trying to check the age of a file but I am getting "unary operator expected" and "unexpected operator" errors depending on bash / sh used in script. 

How can I avoid it?

If I do not use wildcard "\*" then all works fine but have to use it.