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System Administration

Tools for the toolbox
 Thursday, July 25, 2002

One of these initiatives will include discontinuing the snacks and refreshments historically provided by [company]. I know you all understand that drastic times calls for drastic measures and will support this initiative.

That had better not include coffee.

5:16:01 PM #
categories: Coffee, System Administration

Big Enough for China

How many uids are available? Or, to put it another way, just how big is a 32-bit integer?

4,294,967,296

So we can have uid 0 (reserved) to uid 4294967295. There's plenty of room there so that, as we carve it up, most namespaces won't overlap. We shouldn't need to use a 64-bit system until we need to assign user IDs to everyone in China and India. :-)

This is, BTW, the same problem that IPv4 has that IPv6 attempts to solve: the shortness of the namespace.

12:38:06 PM # Google It!
categories: System Administration