1: 安装memcached
问题：error: libevent is required. If it's already installed, specify its path using –with-libevent=/dir/
安装memcached的configure过程遇到这个问题，但是查看是否已经安装了libevent，你会发现系统已经安装了；但还是报错，这是由于libevent是系统默认安装的，并没有安装相应的开发所用的头文件，因此还要用yum -y install libevent-devel；
参考链接：http://www.wp31.com/1022.html
---------------------------------------- 转载自 http://www.wp31.com/1022.html ----------------------------------------
查看系统是否已经安装libevent
# rpm -qa|grep libevent
如果有，不要高兴，先升级
#yum -y install libevent
测试libevent是不是已经安装成功
#ls -al /usr/lib | grep libevent
可以先查看编译参数
# wget http://memcached.googlecode.com/files/memcached-1.4.8.tar.gz
# tar zxvf memcached-1.4.8.tar.gz
# cd memcached-1.4.8
# ./configure –help
# ./configure –prefix=/usr/local/memcached
# make
# make install
checking for libevent directory… configure: error: libevent is required. You can get it from http://www.monkey.org/~provos/libevent/
If it’s already installed, specify its path using –with-libevent=/dir/
所以，还要使用如下命令来安装：
yum install libevent-devel
/usr/local/memcached/bin/memcached -d -m 128 -l 192.168.1.1 -p 11211 -u root
memcached 启动报error while loading shared libraries: libevent-1.4.s解决办法:
原因是找不到libevent-1.4.so.2类库，解决办法如下：
使用LD_DEBUG=help ./memcached -v来确定 加载的类库路径,方法如下:
ln -s /usr/local/lib/libevent-1.4.so.2 /lib/libevent-1.4.so.2
貌似用ldconfig也能解决问题
---------------------------------------- 转载自 http://www.wp31.com/1022.html ----------------------------------------
2：redis安装
redis make error: You need tcl 8.5 or newer in order to run the Redis test
参考链接：
http://blog.csdn.net/luyee2010/article/details/18766911
-------------------------------引用自：http://blog.csdn.net/luyee2010/article/details/18766911------------------------
wget http://downloads.sourceforge.net/tcl/tcl8.6.1-src.tar.gz
sudo tar xzvf tcl8.6.1-src.tar.gz -C /usr/local/
cd /usr/local/tcl8.6.1/unix/
sudo ./configure
sudo make
sudo make install
-------------------------------引用自：http://blog.csdn.net/luyee2010/article/details/18766911------------------------