From owner-freebsd-questions@FreeBSD.ORG Mon Oct 13 05:52:58 2008 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 A59871065694 for ; Mon, 13 Oct 2008 05:52:58 +0000 (UTC) (envelope-from kline@thought.org) Received: from aristotle.thought.org (ns1.thought.org [209.180.213.210]) by mx1.freebsd.org (Postfix) with ESMTP id 550B28FC15 for ; Mon, 13 Oct 2008 05:52:58 +0000 (UTC) (envelope-from kline@thought.org) Received: from thought.org (tao.thought.org [10.47.0.250]) (authenticated bits=0) by aristotle.thought.org (8.14.2/8.14.2) with ESMTP id m9D5rCeu028543; Sun, 12 Oct 2008 22:53:12 -0700 (PDT) (envelope-from kline@thought.org) Received: by thought.org (nbSMTP-1.00) for uid 1002 kline@thought.org; Sun, 12 Oct 2008 22:52:53 -0700 (PDT) Date: Sun, 12 Oct 2008 22:52:53 -0700 From: Gary Kline To: Jeremy Chadwick Message-ID: <20081013055253.GC6708@thought.org> References: <7708.70177.qm@web56801.mail.re3.yahoo.com> <48F1B87E.6010803@infracaninophile.co.uk> <20081012084931.GA84974@icarus.home.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20081012084931.GA84974@icarus.home.lan> User-Agent: Mutt/1.4.2.3i X-Organization: Thought Unlimited. Public service Unix since 1986. X-Of_Interest: With 22 years of service to the Unix community. X-Spam-Status: No, score=-4.4 required=3.6 tests=ALL_TRUSTED,AWL,BAYES_00, DNS_FROM_SECURITYSAGE autolearn=no version=3.2.3 X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on aristotle.thought.org Cc: mdh_lists@yahoo.com, FreeBSD Mailing List Subject: Re: rsync or even scp questions.... 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: Mon, 13 Oct 2008 05:52:58 -0000 On Sun, Oct 12, 2008 at 01:49:31AM -0700, Jeremy Chadwick wrote: > On Sun, Oct 12, 2008 at 09:42:38AM +0100, Matthew Seaman wrote: > > mdh wrote: > >> --- On Sat, 10/11/08, Gary Kline wrote: > >>> On the Ubuntu computer I am /home/kline; on my main > >>> computer, > >>> my home is /usr/home/kline. The following sh script > >>> worked > >>> perfected when my home on "tao" [FBSD] was > >>> /home/kline: > >>> > >>> P > >>> #!/bin/sh > >>> > >>> PWD=`pwd`; > >>> echo "This directory is [${PWD}]"; > >>> > >>> scp -qrp ${PWD}/* ethos:/${PWD} > >>> ###/usr/bin/scp -rqp -i /home/kline/.ssh/zeropasswd-id > >>> ${PWD}/* \ klin > >>> e@ethos:/${PWD} > >>> > >>> Question #1: is there any /bin/sh method of getting rid of > >>> the > >>> "/usr"? I switch off between my two computers > >>> especially when > >>> get mucked up, as with my upgrade to kde4. (Otherwise, I > >>> do > >>> backups of ~kline as well as other critical directories.) > >>> > >>> Is there a way of automatically using rsync rather that my > >>> kwik-and-dirty /bin/shell script? > >>> > >>> thanks, people, > >>> > >>> gary > >> > >> If what you wish to do is simply get rid of /usr in a string, you can use sed like so: > >> varWithoutUsr=`echo ${varWithUsr} |sed -e 's/\/usr//'` > >> After running this, where $varWithUsr is the variable containing a > >> string like "/usr/home/blah", the variable $varWithoutUsr will be equal > >> to "/home/blah". I create simple scripts like this all the time to > >> rename batches of files, for example. > >> > >> The easier way is probably just to not specify a dir to scp's remote > >> path though, since it defaults to the user's home directory. > > > > Or, in anything resembling Bourne shell: > > > > varWithoutUsr=${varWithUsr#/usr} > > And I'll take a moment to recommend Matthew's method, since it does not > involve fork()ing an additional process. > > When writing shell scripts in general, it's best if you can avoid > spawning external processes for things which can be done easily > (keyword: easily!) within Bourne natively. There's no harm in doing it > for more complex things, but fork() is somewhat expensive, and try to > imagine what will happen to those scripts if the system lacks process > table space, etc... :-) Best to try and make everything > "self-contained" if possible. right; esp'ly since i'll be running at least two scripts daily-- at a min. besides, the simpler /bin/sh script is something i use to save code or prose just in case the sky falls! ah, no wonder this is the best list in the {known} universe > > -- > | Jeremy Chadwick jdc at parodius.com | > | Parodius Networking http://www.parodius.com/ | > | UNIX Systems Administrator Mountain View, CA, USA | > | Making life hard for others since 1977. PGP: 4BD6C0CB | > -- Gary Kline kline@thought.org http://www.thought.org Public Service Unix http://jottings.thought.org http://transfinite.thought.org