man which

Forum: The Linux Kernel Hackers' Guide
Re: Where can I find the tcpdump or snoop in linux?
Keywords: tcpdump snoop
Date: Mon, 25 May 1998 00:36:31 GMT
From: <trajek@j00nix.org>

[root@localhost /root]# which tcpdump /usr/sbin/tcpdump [root@localhost /root]#