/usr/local/bin/memcached: error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory
解决办法：
ln -s /usr/local/lib/libevent-1.4.so.2 /usr/lib/libevent-1.4.so.2
或者安装libevent时指定目录 –prefix=/usr/lib
/usr/local/bin/memcached: error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory