Date: Fri, 02 May 2003 18:49:09 -0700 From: Ed Hall <edhall@weirdnoise.com> To: Andy Farkas <andyf@speednet.com.au> Cc: freebsd-questions@freebsd.org Subject: Re: Zeros and ones Message-ID: <200305030149.h431n92e039390@screech.weirdnoise.com> In-Reply-To: Message from Andy Farkas <andyf@speednet.com.au> <20030503095717.G67119-100000@hewey.af.speednet.com.au>
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On Sat, 3 May 2003 09:58:11 +1000Andy Farkas <andyf@speednet.com.au> wrote: > On Fri, 2 May 2003, Jerry McAllister wrote: > > > It is easy and convenient to use /dev/zero to write out a number of > > zero bytes to somewhere - as in: > > > > dd if=/dev/zero of=zerofile bs=512 count=1770000 > > or > > dd if=/dev/zero of=/dev/da1 bs=512 count=1770000 > > > > But, I would like to write all ones - as in 0xff or maybe some > > other pattern - as if there was a /dev/one also. > > > > Is there a nice way to do this using UNIXistic stringing existing > > stuff together? Or do I have to write a little piece of code? > > > > Thanks for any [positive] suggestions. > > > > ////jerry > > Play around with jot(1). > Specifically, jot -c -s '' -n {size} {byte} - 0 >file will output {size} bytes of value {byte} (both values specified in decimal) into "file". -Ed
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