缺少动态链接库错误修复
安装memcached时候遇到缺少动态链接库错误：
[root@test02 bin]# ./memcached -h
./memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory
总结下来主要有3种方法：
1. 用ln将需要的so文件链接到/usr/lib或者/lib这两个默认的目录下边
ln -s /where/you/install/lib/*.so /usr/lib sudo ldconfig
2.修改LD_LIBRARY_PATH
export LD_LIBRARY_PATH=/where/you/install/lib:$LD_LIBRARY_PATH sudo ldconfig
3.修改/etc/ld.so.conf，然后刷新
vim /etc/ld.so.conf add /where/you/install/lib sudo ldconfig
