1.下载：
libevent-2.0.21-stable.tar.gz
memcached-1.4.15.tar.gz
2.解压缩
tar zxvf libevent-2.0.21-stable.tar.gz
3.编译
cd libevent-2.0.21-stable
./configure --prefix=/usr
make
make install
4.测试libevent是否安装成功：
[root@caocao-web libevent-2.0.21-stable]# ls -al /usr/lib | grep libevent
lrwxrwxrwx 1 root root 21 Aug 20 18:55 libevent-2.0.so.5 -> libevent-2.0.so.5.1.9
-rwxr-xr-x 1 root root 968861 Aug 20 18:55 libevent-2.0.so.5.1.9
-rw-r--r-- 1 root root 1574410 Aug 20 18:55 libevent.a
lrwxrwxrwx 1 root root 26 Aug 20 18:55 libevent_core-2.0.so.5 -> libevent_core-2.0.so.5.1.9
-rwxr-xr-x 1 root root 571966 Aug 20 18:55 libevent_core-2.0.so.5.1.9
-rw-r--r-- 1 root root 957882 Aug 20 18:55 libevent_core.a
-rwxr-xr-x 1 root root 970 Aug 20 18:55 libevent_core.la
lrwxrwxrwx 1 root root 26 Aug 20 18:55 libevent_core.so -> libevent_core-2.0.so.5.1.9
lrwxrwxrwx 1 root root 27 Aug 20 18:55 libevent_extra-2.0.so.5 -> libevent_extra-2.0.so.5.1.9
-rwxr-xr-x 1 root root 417375 Aug 20 18:55 libevent_extra-2.0.so.5.1.9
-rw-r--r-- 1 root root 616600 Aug 20 18:55 libevent_extra.a
-rwxr-xr-x 1 root root 977 Aug 20 18:55 libevent_extra.la
lrwxrwxrwx 1 root root 27 Aug 20 18:55 libevent_extra.so -> libevent_extra-2.0.so.5.1.9
-rwxr-xr-x 1 root root 935 Aug 20 18:55 libevent.la
lrwxrwxrwx 1 root root 29 Aug 20 18:55 libevent_openssl-2.0.so.5 -> libevent_openssl-2.0.so.5.1.9
-rwxr-xr-x 1 root root 87014 Aug 20 18:55 libevent_openssl-2.0.so.5.1.9
-rw-r--r-- 1 root root 122732 Aug 20 18:55 libevent_openssl.a
-rwxr-xr-x 1 root root 1006 Aug 20 18:55 libevent_openssl.la
lrwxrwxrwx 1 root root 29 Aug 20 18:55 libevent_openssl.so -> libevent_openssl-2.0.so.5.1.9
lrwxrwxrwx 1 root root 30 Aug 20 18:55 libevent_pthreads-2.0.so.5 -> libevent_pthreads-2.0.so.5.1.9
-rwxr-xr-x 1 root root 18102 Aug 20 18:55 libevent_pthreads-2.0.so.5.1.9
-rw-r--r-- 1 root root 18694 Aug 20 18:55 libevent_pthreads.a
-rwxr-xr-x 1 root root 998 Aug 20 18:55 libevent_pthreads.la
lrwxrwxrwx 1 root root 30 Aug 20 18:55 libevent_pthreads.so -> libevent_pthreads-2.0.so.5.1.9
lrwxrwxrwx 1 root root 21 Aug 20 18:55 libevent.so -> libevent-2.0.so.5.1.9
5.编译memecached
cd memcached-1.4.15
./configure --with-libevent=/usr
make
make install
6.测试是否安装成功
ls -al /usr/local/bin/mem*
-rwxr-xr-x 1 root root 200727 Dec 1 2011 /usr/local/bin/memaslap
-rwxr-xr-x 1 root root 298349 Aug 20 18:58 /usr/local/bin/memcached
-rwxr-xr-x 1 root root 116918 Dec 1 2011 /usr/local/bin/memcapable
-rwxr-xr-x 1 root root 43001 Dec 1 2011 /usr/local/bin/memcat
-rwxr-xr-x 1 root root 47935 Dec 1 2011 /usr/local/bin/memcp
-rwxr-xr-x 1 root root 41161 Dec 1 2011 /usr/local/bin/memdump
-rwxr-xr-x 1 root root 34224 Dec 1 2011 /usr/local/bin/memerror
-rwxr-xr-x 1 root root 40935 Dec 1 2011 /usr/local/bin/memflush
-rwxr-xr-x 1 root root 47012 Dec 1 2011 /usr/local/bin/memparse
-rwxr-xr-x 1 root root 41612 Dec 1 2011 /usr/local/bin/memrm
-rwxr-xr-x 1 root root 68257 Dec 1 2011 /usr/local/bin/memslap
-rwxr-xr-x 1 root root 51269 Dec 1 2011 /usr/local/bin/memstat
7.启动Memcached服务：
.启动Memcache的服务器端：
# /usr/local/bin/memcached -d -m 10 -u root -l 192.168.141.64 -p 12000 -c 256 -P /tmp/memcached.pid
-d选项是启动一个守护进程，
-m是分配给Memcache使用的内存数量，单位是MB，我这里是10MB，
-u是运行Memcache的用户，我这里是root，
-l是监听的服务器IP地址，如果有多个地址的话，我这里指定了服务器的IP地址192.168.0.200，
-p是设置Memcache监听的端口，我这里设置了12000，最好是1024以上的端口，
-c选项是最大运行的并发连接数，默认是1024，我这里设置了256，按照你服务器的负载量来设定，
-P是设置保存Memcache的pid文件，我这里是保存在 /tmp/memcached.pid，
/usr/local/bin/memcached -d -m 1024 -u root -l 221.122.114.80 -p 12000 -c 500 -P /usr/local/lol/memcached/memcached.pid （注意最后一个P是大写）
8.如果要结束Memcache进程，执行：
# kill `cat /tmp/memcached.pid`
ps -aux | grep memcache
也可以启动多个守护进程，不过端口不能重复。
常见问题:
1.如果启动Memcached服务的时候遇到了
/usr/local/bin/memcached: error while loading shared libraries: libevent-1.2.so.1: cannot open shared object file: No such file or directory;
解决方案:
复制代码
[root@localhost bin]# LD_DEBUG=libs memcached -v
[root@localhost bin]# ln -s /usr/lib/libevent-1.2.so.1 /usr/lib64/libevent-1.2.so.1
[root@localhost bin]# /usr/local/bin/memcached -d -m 100 -u root -p 12000 -c 1000 -P /tmp/memcached.pid
[root@localhost bin]# ps -aux
复制代码
可以看到启动的Memcached服务了.
2.把Memcached服务加载到Linux的启动项中.万一机器断电系统重启.那么Memcached就会自动启动了.
假如启动Memcache的服务器端的命令为：
# /usr/local/bin/memcached -d -m 10 -u root -l 192.168.141.64 -p 12000 -c 256 -P /tmp/memcached.pid容来自17jquery
想开机自动启动的话，只需在/etc/rc.d/rc.local中加入一行，下面命令
/usr/local/memcached/bin/memcached -d -m 10 -p 12000 -u apache -c 256
上面有些东西可以参考一下：即，ip不指定时，默认是本机，用户:最好选择是：apache 或 deamon
这样，也就是属于哪个用户的服务，由哪个用户启动。