一: 定义
1.以下是来自RPM官方网站的定义
The RPM Package Manager (RPM) is a powerful package management system capable of
building computer software from source into easily distribute packages
installing, updating and uninstalling packaged software
querying detailed information about the packaged software, whether installed or not
verifying integrity of packaged software and resulting software installation.
2.以下是来自wiki
RPM Package Manager (RPM) (originally Red Hat Package Manager, now a recursive acronym) is a free and open-source package management system.[5] The name RPM refers to .rpm file format and the package manager program itself. RPM was intended primarily for Linux distributions; the file format is the baseline package format of the Linux Standard Base
我们RPM的全写就是（RED HAT PACKAGE MANAGER）.
二. 应用
1.升级（我以下是redhat 企业版本.然后可以不用改端口）
rpm -U info2soft-i2node-7.1.68.20122900-el6.x86_64.rpm
把66升级成68
2. 以下是安装的方法
rpm -U info2soft-i2node-7.1.68.20122900-el6.x86_64.rpm
三 总结
1 .升级后会自动覆盖.
2 .查询RPM相关的安装位置的方法
3. 没事就要man一下
4. rpm -i (重新安装) rpm -e是删除程序
rpm -ql xx.file