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Overwrites a file with zeroes.
Put in in your .bashrc or .bash_profile in Mac OS X.

zero() {

case "$1" in
"") echo "Usage: zero <file>"
return -1;
filesize=`wc -c "$1" | awk '{print $1}'`
`dd if=/dev/zero of=$1 count=$filesize bs=1`

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The last line should not be enclosed in backticks.

The variables in the last line should be quoted.

Use this method to get filesize to avoid calling awk:
filesize=$( wc -c < "$1" )
Posted 2008-11-13 17:07:34
also, the case needs to end with ;;
Posted 2008-11-13 17:09:53

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