Linux下安装JDK

Linux下安装JDK-rpm

RPM：
Linux rpm 命令参数使用详解［介绍和应用］

wget:
http://www.cnblogs.com/peida/archive/2013/03/18/2965369.html
http://blog.csdn.net/xifeijian/article/details/9399121
http://www.jb51.net/LINUXjishu/86326.html

chmod:
http://www.cnblogs.com/peida/archive/2012/11/29/2794010.html
http://www.cnblogs.com/younes/archive/2009/11/20/1607174.html

/etc
/etc/profile

source:
http://blog.csdn.net/simon_dong618/article/details/1581132
http://www.51testing.com/html/38/225738-206878.html
https://bash.cyberciti.biz/guide/Source_command