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Shell Programming and Scripting
conversion of loop in perl
Post 302693001 by learnbash on Tuesday 28th of August 2012 10:22:53 AM
08-28-2012
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LEARN ABOUT SUSE
blockdev
BLOCKDEV(8) System Manager's Manual BLOCKDEV(8) NAME
blockdev - call block device ioctls from the command line SYNOPSIS
blockdev [options] commands devices blockdev --report [devices] DESCRIPTION
The utility blockdev allows one to call block device ioctls from the command line. OPTIONS
-V Print version and exit. -q Be quiet. -v Be verbose. --report Print a report for devices. Note that the partition StartSec is in 512-byte sectors. COMMANDS
--setro Set read-only. --setrw Set read-write. --getro Get read-only. Print 1 if the device is read-only, 0 otherwise. --getss Print sectorsize in bytes - usually 512. --getbsz Print blocksize in bytes. --setbsz N Set blocksize to N bytes. --getsize Print device size in sectors (BLKGETSIZE). Deprecated in favor of the --getsz option. --getsize64 Print device size in bytes (BLKGETSIZE64) --getsz Get size in 512-byte sectors (BLKGETSIZE64 / 512). --setra N Set readahead to N 512-byte sectors. --getra Print readahead (in 512-byte sectors). --setfra N Set filesystem readahead (same like --setra on 2.6 kernels). --getfra Get filesystem readahead. --flushbufs Flush buffers. --rereadpt Reread partition table. AUTHOR
blockdev was written by Andries E. Brouwer. AVAILABILITY
The blockdev command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. Jun 2007 BLOCKDEV(8)