#!/bin/bash wlan=`/sbin/ifconfig wlan0 | grep inet\ addr | wc -l` if [ $wlan -eq 0 ]; then /sbin/ifdown wlan0 && /sbin/ifup wlan0 else echo interface is up fi # Then chmod 555 /root/checkwanup and add it to your crontab: crontab -e */15 * * * * /bin/bash /root/checkwanup
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