Upgrading a live server with rdist

Chuck Swiger cswiger at mac.com
Tue Jun 3 07:36:34 PDT 2003

Konrad Heuer wrote:
[ ... ]
> As far as I see there is little chance to do this without carefully
> restarting all processes, e.g. by shutting down into single user mode and
> returning to multi user mode.

It is advisable to switch into single-user mode when updating the system files, 

> If you replace program files and shared libraries used by currently
> running processes, this will cause the corresponding processes to be
> aborted abnormally in case of page fault requiring a page-in from the
> program files or shared libraries.

Generally not; the system doesn't delete files that are in use even if you 
overwrite those files: it hangs on to the inode and won't free the space until 
nobody needs that file.


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