Maximum Users?

wcole · 09-07-2006, 10:27 AM

Anybody know what the maximum number of users that can be set up on a Red Hat server?

w3bd3vil · 09-07-2006, 10:35 AM

I guess infinite.

wcole · 09-07-2006, 02:13 PM

Somehow that doesn't sound quite right. Does anybody know for certain?

michaelk · 09-07-2006, 02:50 PM

Making some assumptions on your question....

Usernames are associated with user IDs (UIDs). UIDs are numbers from zero to 65534. Check out the /etc/passwd file. Every username is assigned a number. i.e
root UID 0 and nobody is 65534. AFAIK it depends on the distribution but normal users typically start at 500.

If your asking about how many concurent connections on a server then that would be determined by the application and server hardware.

wcole · 09-07-2006, 03:09 PM

Thanks for the replies..

for clarification, it's not so much concurrent connections. We are currently have a server that receives data from our clients for a data warehouse. Unfortunately our current setup requires us to have each client exist as a user on the server and we were just wondering if/when we would run into a wall with that.

w3bd3vil · 09-07-2006, 10:57 PM

have a look at what wikipedia has to say

Quote:

Version 2.6 - current (December 17, 2003 to the present)
.....
# Increased the maximum number of users and groups each from 65,536 to over 4 billion.
# Increased the maximum number of process ids from 32,768 to over 1 billion.

http://en.wikipedia.org/wiki/Linux_kernel