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backup files (See related posts)

// create backup copy

#!/bin/bash

filename=$1
date=`date +%Y%m%d`

usage () {
        echo "Usage: `basename $0` filename"
}

if [ -z "$filename" -a ! -f "$filename" ]; then
        usage
        exit 1
fi

rev=0
backup="$filename.$date.$rev"

while [ -f $backup ]; do
        let rev+=1
        backup="$filename.$date.$rev"
done

cp $filename $backup
exit $?
to date shell bash backup script code by hostmaster on Wed Dec 19 08:21:22 +0000 2007

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