libevent
yum erase libevent* wget https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz tar xzvf libevent-2.0.21-stable.tar.gz cd libevent-2.0.21-stable make clean ./configure --prefix=/usr make make install ln -s /usr/lib/libevent* /usr/lib64/