>Date: Tue, 21 May 1996 05:45:07 -0400 (EDT)
>From: "Brad Salai" <bsalai@servtech.com>

>law:~>tcpdump -i ppp0 icmp
>tcpdump: /dev/bpf0: No such file or directory
>
>What do I need to do?

Make sure that your kernel config contains a line that looks something
like:

pseudo-device	bpf	4

If not, then add it and rebuild your kernel.  Then do this:

# (cd /dev; sh MAKEDEV bpf0 bpf1 bpf2 bpf3)

Then tcpdump should work.
-- 
Mike Long <mike.long@analog.com>     <URL:http://www.shore.net/~mikel>
VLSI Design Engineer         finger mikel@shore.net for PGP public key
Analog Devices, CPD Division          CCBF225E7D3F7ECB2C8F7ABB15D9BE7B
Norwood, MA 02062 USA       (eq (opinion 'ADI) (opinion 'mike)) -> nil