Copying kernel and OS

Jack Raats jack at
Wed Dec 7 22:03:15 PST 2005

Is it also possible to scp both directories to the slow machine?


----- Original Message ----- 
From: "Stephen Montgomery-Smith" <stephen at>
To: "Jack Raats" <jack at>
Cc: <freebsd-questions at>; "FreeBSD Stable" 
<freebsd-stable at>
Sent: Wednesday, December 07, 2005 10:29 PM
Subject: Re: Copying kernel and OS

> Jack Raats wrote:
>> I've two machines running FreeBSD 6.0-STABLE.
>> One very fast machine and one very very slow machine. On the fast machine 
>> I can compile a new kernel and OS very quickly and easily.
>> Is it possible to transfer the compile world and kernel to the slow 
>> machine. If yes whart directories etc... do i have to transfer.
>> Jack
> I do something like this.  I build on the fast machine, and then use NFS 
> to allow the slow machine to access /usr/src and /usr/obj.  I have found 
> that it is important to preserve the names of the directories, so that 
> they are also called /usr/src and /usr/obj on the slow machine.  Then I 
> just do mergemaster, make installworld, make installkernel (in the 
> appropriate order) on the slow machine, and it works like a charm.
> The entries in fstab are like this:
> hub2:/usr/obj    /usr/obj        nfs     rw,bg,noauto    0       0
> hub2:/usr/src    /usr/src        nfs     rw,bg,noauto    0       0
> where hub2 is the name of the fast machine.
> In /etc/exports on hub2 I have something like this
> /usr -maproot=root -alldirs -network -mask
> (here is the IP addresses of my LAN)
> and in /etc/rc.conf on hub2 I have some lines like
> nfs_server_enable="YES"
> rpcbind_enable="YES"
> Then on the slow machine I simply type
> mount /usr/src
> mount /usr/obj
> -- 
> Stephen Montgomery-Smith
> stephen at

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