ahmad riza h nst writes: > hello, > > i need to setup a mail server with postfix + dovecot + webmin + > virtualmin + virtual user with linux system user. the virtual user may > reach to thousands user from several hundreds virtual domains. > > what i concern is large numbers of linux system user which used in > these setup, is it good or bad? The large number of system users should not be a problem. Might have been an issue with Linux 2.4 (2^16=65536 max users), but Linux 2.6 can handle a LOT (2^32=4294967296)[1]. I'd be more worried of the stress this number of users can inflict on a machine (CPU, memory, I/O etc). [1] - http://en.wikipedia.org/wiki/Linux_kernel -- Nux! www.nux.ro