解决办法：
1. 查看哪个安装包包含该库：yum provides libstdc++.so.6
libstdc++-4.4.7-4.el6.i686
2. 安装 libstdc++-4.4.7-4.el6.i686
yum install libstdc++-4.4.7-4.el6.i686
报错：
--> Finished Dependency Resolution
Error: Protected multilib versions: libstdc++-4.4.7-4.el6.i686 != libstdc++-4.4.7-3.el6.x86_64
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
2.1 解决办法：
yum update libstdc++-4.4.7-3.el6.x86_64
然后再执行步骤2的命令
