The Fonera OS doesn’t bring the hostname command, but you can change it’s default “OpenWrt” hostname to any hostname you like:
# sysctl -w kernel.hostname=fon01
kernel.hostname = fon01
# uname -a
Linux fon01 2.4.32 #9 jue nov 23 12:11:45 UTC 2006 mips unknown
(note: the date is wrong!)
You can make it persistent accross reboot:
echo "kernel.hostname=fon01" >> /etc/sysctl.conf