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cron=while [ "$cron" != "yes" ] && [ "$cron" != "no" ]; doecho "Cron-oikeudet? yes/no"echo "default on yes"read cron[ "z$cron" = "z" ] && cron="yes"if [ "$cron" != "yes" ] && [ "$cron" != "no" ] then echo "Not understood."    done