From owner-freebsd-questions@FreeBSD.ORG Tue Mar 1 16:39:29 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D0756106564A for ; Tue, 1 Mar 2011 16:39:29 +0000 (UTC) (envelope-from mubeeshalivm@gmail.com) Received: from mail-bw0-f54.google.com (mail-bw0-f54.google.com [209.85.214.54]) by mx1.freebsd.org (Postfix) with ESMTP id 615838FC14 for ; Tue, 1 Mar 2011 16:39:28 +0000 (UTC) Received: by bwz12 with SMTP id 12so5255323bwz.13 for ; Tue, 01 Mar 2011 08:39:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=Krcx/Sy8Qh/K0a6LKlpCmUA4H4ANaylZ/JZT6j+CZ8A=; b=JNm+qlTwXr1QUUx4K/IVy6pTc0OW61xLJDiaL9yJfcOnWsRFUxFD1A8inM1ED32sMg KLNsvGsMJITtLb7WnwDfhyRJxgi1SM3r4Rf2HD1QICH+euvYeUGQHBNKoj/bWNNNGRYm wMouB6yTgSKb1pw5ZNpZlxN+qetRUG968kJws= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; b=hXYKf3edfOLou/du4TYODGsqi0kqdHAknZ2x9eC0X13iiDYqd8Bz1ss5mo4xGO6wh7 0m6/N8DFslnzzQelFeSSKQLZpJsPuid3j2idkxbPoAVZZtuB7Yg7Cl8xlVoM60q4cBQt 3QkzcisxxvDHWz+QolZTJoq9arWqS4Tl78ZBY= MIME-Version: 1.0 Received: by 10.204.80.161 with SMTP id t33mr6332144bkk.121.1298995669329; Tue, 01 Mar 2011 08:07:49 -0800 (PST) Received: by 10.204.62.83 with HTTP; Tue, 1 Mar 2011 08:07:49 -0800 (PST) Date: Tue, 1 Mar 2011 21:37:49 +0530 Message-ID: From: Mubeesh ali To: FreeBSD Questions Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Subject: how to read a live changing capture file with a tcpdump or wireshark like with tail for a file. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Mar 2011 16:39:29 -0000 Hi , We do wifi troubleshooting and are planning to use kismet for wireless captures. It produces a file that will be written into every 300 secs(configurable value ,we use 30 secs). While comparing with a expensive windows sniffer like Omnipeek the only disadvantage of this free tool is we have to continoulsly do tcpdump -r as the file changes. same with wireshark we need to hit the refresh button. Is there something equivalent to 'tail' for changing files for reading pcap files ? Appreciate any suggestions. --=20 Best=A0 Regards, Mubeesh Ali.V.M