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There are two BOOTP servers available for GNU/Linux. The first is CMU bootpd. The other is actu- ally a DHCP server: ISC dhcpd. In Ubuntu these are contained in the bootp and isc-dhcp-server packages respectively.
To use CMU bootpd, you must first uncomment (or add) the relevant line in /etc/inetd.conf. On Debian or Ubuntu, you can run update-inetd --enable bootps, then /etc/init.d/inetd reload to do so. Just in case your BOOTP server does not run Debian or Ubuntu, the line in question should look like:
bootps dgram udp wait root /usr/sbin/bootpd bootpd -i -t 120
Now, you must create an /etc/bootptab file. This has the same sort of familiar and cryptic format as the good old BSD printcap, termcap, and disktab files. See the bootptab manual page for more information. For CMU bootpd, you will need to know the hardware (MAC) address of the client. Here is an example /etc/bootptab:
client:\ hd=/tftpboot:\ bf=tftpboot.img:\ ip=192.168.1.90:\ sm=255.255.255.0:\ sa=192.168.1.1:\ ha=0123456789AB:
You will need to change at least the “ha” option, which specifies the hardware address of the client. The “bf” option specifies the file a client should retrieve via TFTP; see Section 4.3.5 for more details.
By contrast, setting up BOOTP with ISC dhcpd is really easy, because it treats BOOTP clients as a moderately special case of DHCP clients. Some architectures require a complex configuration for booting clients via BOOTP. If yours is one of those, read the section Section 4.3.2. Otherwise you will probably be able to get away with simply adding the allow bootp directive to the configura- tion block for the subnet containing the client in /etc/dhcp/dhcpd.conf, and restart dhcpd with
/etc/init.d/isc-dhcp-server restart.