I have a small Debian-based Linux device which set's its hostname by calling
udhcpc -i $interface -S -x hostname:mydevice
$interface is defined earlier in the script calls
This works as intended, on my router I can see mydevice as active host name for this device.
My device - after obtaining the lease - mounts its new root file system from NFS and then
chroots into it.
udhcpc will be sending renew requests to my router:
# cat /var/log/messages | grep dhcp Jan 1 04:00:07 udhcpc: started, v1.28.1 Jan 1 04:00:07 udhcpc: sending discover Jan 1 04:00:09 udhcpc: performing DHCP renew Jan 1 04:00:09 udhcpc: sending discover Jan 1 04:00:09 udhcpc: sending select for a.b.c.d Jan 1 04:00:09 udhcpc: lease of a.b.c.d obtained, lease time 600 ***NOW THE CHROOT HAPPENS*** Jan 1 04:05:09 udhcpc: sending renew to r.o.u.t Jan 1 04:05:09 udhcpc: lease of a.b.c.d obtained, lease time 600 Jan 1 04:10:09 udhcpc: sending renew to r.o.u.t Jan 1 04:10:09 udhcpc: lease of a.b.c.d obtained, lease time 600
I want to update the hostname after the
What have I tried:
udhcpcand restarting it with the new desired hostname: FAIL (NFS drops, system stalls)
udhcpc's manual: FAIL (haven't found any mention of updating hostname on a running instance)
Any idea is appreciated: all I want is to update the hostname on the active
Important: it's enough (accepted as answer) if I can update the hostname on a "sending renew to r.o.u.t" event.