sudo sdparm --command=start|stop /dev/sdX 

...
		# See if our running kernel supports the NFS kernel server
		if [ -f /proc/kallsyms ] && ! grep -qE 'init_nf(sd|	)' /proc/kallsyms; then
			log_warning_msg "Not starting $DESC: no support in current kernel."
			exit 0
		fi
...

...
		# See if our running kernel supports the NFS kernel server
		if [ ! -f /proc/fs/nfs/exports ]; then
		    log_warning_msg "Not starting $DESC: no support in current kernel."
		    exit 0
		fi
...

#!/bin/bash
#
#
set_suffix()
{
  echo ${1%.*}${2}
}
for F in "$@";do
	convert "$F" "$(basename "$(set_suffix "$F" ".jpg")")"
done

#!/bin/bash
#
#
set_suffix()
{
  echo ${1%.*}${2}
}
for F in "$@";do
        convert "$F" "$(basename "$(set_suffix "$F" ".png")")"
done

#!/bin/sh
#
# scale an image to 1x1 and back to old size
#   effectively reducing the colors to a single avg. color
#

for F in $@; do
SIZE=`convert -verbose -scale 1x1 "$F" temp.tga`
SIZE=${SIZE#* }
SIZE=${SIZE#* }
SIZE=${SIZE%% *}
  convert -scale $SIZE temp.tga "$F"
done

#!/bin/bash
#
# find dead symlinks
#

find . -type l | (while read F ; do test -e "$F" || ls -ld "$F"; done)

#!/bin/bash
#
# USAGE: dumper.sh FILE [START] [LEN]
#
# shows the byte-count in hex and dec
#

FILE=${1}
START=${2}
LEN=${3}


dump ()
{
  #  _a[dox]  Display the input offset, cumulative across input files, of the next byte to be displayed.
  #           The appended characters d, o, and x specify the display base as decimal, octal or
  #           hexadecimal respectively.
  hexdump -v -e '"%08_ad  %08_ax  "' -e '16/1 "%02x "' -e '"  "' -e '16/1 "%_p"' -e '"\n"' ${@}
}

if [[ ${START} == "" && ${LEN} == "" ]]; then
  dump ${FILE}
  exit
fi

if [[ ${LEN} == "" ]]; then
  dump -s ${START} ${FILE}
  exit
fi

dump -s ${START} -n ${LEN} ${FILE}


exit

#!/bin/sh
#
# rename filenames to lower-case
#
for F in "$@"; do
	echo "mv \"${F}\" \"$(echo "${F}" | tr [:upper:] [:lower:])\""
done

#!/bin/sh
#
# grayscale an image
#

for F in $@; do
  convert "$F" -colorspace Gray gray_"$F"
done

~$ qemu-img convert disk_image.img -O vmdk disk_image.vmdk

~$ qemu-img convert disk_image.img -O raw disk_image.raw
~$ vboxmanage convertdd disk_image.raw disk_image.vdi

~$ qemu-img convert -f vmdk disk_image.vmdk -O qcow/qcow2  disk_image.img

~$ qemu-img convert -f vmdk disk_image.vmdk -O raw disk_image.raw
~$ vboxmanage convertdd disk_image.raw disk_image.vdi

sh# dd if=/dev/zero of=temp-swap.img count=1000000

sh# mkswap ./temp-swap.img

sh# swapon ./temp-swap.img

sh# cat /proc/swaps