[NBLUG/talk] OT: Bulk erasure

[Scott Doty]

On Wed, Apr 02, 2003 at 05:33:58PM -0800, Andru Luvisi wrote:
> # DEV=/dev/st0  # SCSI tape 0
> # DEV=/dev/hda  # First IDE disk
> i=0
> while [ $i -lt 5 ]
> do
>   dd if=/dev/zero of=$DEV
>   perl -e 'for(;;) { print "\xff"; }' |dd of=$DEV
>   dd if=/dev/urandom of=$DEV
>   i=`expr $i + 1`
> end

Just thought I'd mention that bash understands four-function math...

    i=`expr $i + 1`

could also read...

    i=$[$i+1]

:)

 -Scott