dd wrt

1. 0 1 * * * root /sbin/ifconfig ath0 down
    
   30 7 * * 1-5 root /sbin/ifconfig ath0 up
    
   30 8 * * 1-5 root /sbin/ifconfig ath0 down
    
   0 21 * * 1-5 root /sbin/ifconfig ath0 up
    
   0 10 * * 0,6 root /sbin/ifconfig ath0 up
2. ifconfig ath0 down
    
   iwconfig ath0 txpower off
3. http://www.dd-wrt.com/wiki/index.php/CRON/zh_cn
4. http://unixhelp.ed.ac.uk/CGI/man-cgi?crontab+5