Is there a way to allow a Windows executable on a Linux file system provided to Windows clients via samba to be locked in such a way that only one instance of the program may be run at a time? If possible, I'd also like to prevent anyone from downloading their own copy and running it. Have execute permissions but not read permissions? Does that kind of permission map to Windows 2000 with NTFS? Thanks, Clint -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.9.5 - Release Date: 4/7/2005