Sorry for disturbing, but nobody could answer me. I use samba-2.2.5 from sources and Linux RedHat 7.2. I use dosemu-1.1.3 from sources to allow users to telnet to server and run foxpro 2.6 in dosemu. Network users via samba and local via dosemu should access the same database simultaneosly; but samba does not lock files! Dosemu users see each other locks, and samba users see each other locks, but dosemu user does not see samba locks. I run foxpro in Microsoft Dos 7.0 and do: set exclusive on use my.dbf Lsof (list open files) program shows that file is open read-write (u) and is not locked! But when I do it in dosemu, lsof tells file is locked! (uw). smb.conf is default from 2.2.5 distribution, Posix locking that should locks the file is on, but o use. Tell me please if this is normal and what then "Posix locking" mean????