ubuntu 使用第一天

1. 在 apt-get install xxx 时候 未选择合适的源 -> 改 sources.list
2. 接1 未配好 DNS -> http://dudns.baidu.com/useDoc.html#linux-terminal

ps：/etc/resolv.conf

nameserver 180.76.76.76
nameserver 114.114.114.114

3.JDK 的安装 -> http://www.cnblogs.com/savagemorgan/p/3650926.html

ps:
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
sudo tar zxvf
sudo mv
~/.bashrc

export JAVA_HOME=xxx
export CLASSPATH=${JAVA_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

source ~/.bashrc