查看linux上安装的软件来自哪个套件，查看linux来自套件

查看linux上安装的软件来自哪个套件，查看linux来自套件

一个关于软链接值得注意的问题就是查看linux上安装的软件来自哪个套件 
比如查看java来自哪个套件:

[root@liyong: shell]# rpm -qf `which java`
file /usr/bin/java is not owned by any package

这样查不到java的包来源,查看Java命令

ll `which java`
lrwxrwxrwx. 1 root root 22 Mar 22 03:16 /usr/bin/java -> /etc/alternatives/java

发现java命令是/etc/alternatives/java的软链接,继续查看/etc/alternatives/java,发现这个文件又是一个软链接

[root@liyong: shell]# ll /etc/alternatives/java
lrwxrwxrwx. 1 root root 73 Mar 22 03:16 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.121-0.b13.el7_3.x86_64/jre/bin/java

最后通过rpm -qf java命令的真实路径才查到java的包来源:

[root@liyong: shell]# rpm -qf /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.121-0.b13.el7_3.x86_64/jre/bin/java

java-1.8.0-openjdk-headless-1.8.0.121-0.b13.el7_3.x86_64

至此跳坑完毕…