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#!/bin/bash
if [ x`pwd` = "x/etc" ]
then
echo Cannot operate directly on \"/etc\". >&2
exit 1
fi
#make prototype for /etc/shadow
sed -e "s/:.*/:*:`expr $(date +%s) / 86400`:0:99999:7:::/" passwd >shadow
#make prototype for /etc/gshadow
sed -e 's/:[0-9]\+:/::/g' group >gshadow
#mark passwd and group files entries shadowed
sed -i -e 's/^\([^:]\+\):[^:]*:/\1:x:/' passwd group
echo Converted successfully.
exit 0
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