picuntu usb wifi

for i in /sys/class/net/*; do e=`basename $i`; echo "# $e"; sudo ethtool $e | grep -E "Link|Speed" ; done

Picuntu mk808b usbnet設定

/etc/network/interface
auto lo
iface lo inet loopback
auto usbnet0
iface usbnet0 inet dhcp
auto usb0
iface usb0 inet static
address 192.168.1.200
auto eth0
iface eth0 inet dhcp
wpa-ssid #####
wpa-psk #####

Java字串中換行符號的ascii

    String aa[] = {"\n\r"} ;
    System.out.println( (int)(aa[0].charAt(0)));
    System.out.println( (int)(aa[0].charAt(1)));