linux DNS 设置
sudo vim /etc/resolv.conf
http://www.alidns.com/setup/#linux
wget http://www.alidns.com/static/soft/SetAliDNS.sh -O SetAliDNS.sh && chmod +x SetAliDNS.sh && sudo ./SetAliDNS.sh
卸载
sudo ./SetAliDNS.sh restore
键盘修改
xmodmap -e "keycode 105=Delete"