Documentation for dhclient.

[Peter Rathlev]

On Tue, 2011-05-10 at 17:41 -0700, Stephan Tiriac wrote:
> Maybe you could tell me what's the difference between the  -r and -x 

What version of dhcp do you use? Are you sure it's not some old release?

The stock dhclient in Fedora 13 (dhclient-4.1.2-4.ESV.R2.fc13.x86_64)
has a very well documented dhclient. The current plain vanilla version
(dhcp-4.2.1-P1) has the same information in the "client/dhclient.8" man
page.

  -r   Release the current lease and stop the running DHCP client as
       previously recorded in the PID file.  When shutdown  via this
       method dhclient-script(8) will be executed with the specific
       reason for calling the script set.  The client normally doesn’t
       release the current lease as this is not required by the DHCP
       protocol but some cable ISPs require their clients to notify
       the server if they wish to release an assigned IP address.

  -x   Stop  the  running  DHCP  client  without  releasing the
       current lease.  Kills existing dhclient process as previously
       recorded in the PID file.  When shutdown via this method
       dhclient-script(8) will be executed with the specific  reason
       for calling the script set.

I wouldn't call that "poorly documented".

-- 
Peter