memcached 安装使用

使用redhat6.0 系统在线安装时提示This system is not registered with RHN.如下：

# yum install gcc
Loaded plugins: rhnplugin, security
This system is not registered with RHN.
RHN support will be disabled.
Setting up Install Process
No package httpd available.
Nothing to do
解决方案：

检查是否安装yum

预备：rpm -qa|grep yum

1.卸载redhat自带的yum组件

# rpm -qa|grep yum|xargs rpm -e --nodeps

2.安装centos的yum包（要求python 是2.6以上版本）

# wget http://mirror.centos.org/centos/6/os/i386/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm

# wget http://mirror.centos.org/centos/6/os/i386/Packages/yum-metadata-parser-1.1.2-16.el6.i686.rpm

# wget http://mirror.centos.org/centos/6/os/i386/Packages/yum-3.2.29-40.el6.centos.noarch.rpm

# wget http://mirror.centos.org/centos/6/os/i386/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm



#rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
#rpm -ivh yum-metadata-parser-1.1.2-16.el6.i686.rpm
#rpm -ivh yum-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm
注意最后两个包必需同时安装，否则会相互依赖



3. 下载更新源，并存放在系统目录中
# wget http://docs.linuxtone.org/soft/lemp/CentOS-Base.repo

#mv CentOS_Base.repo /etc/yum.repos.d/CentOS-Base.repo


4.生成缓存并进行安装

# yum makecache
至此可以使用yum了。



补充更改yum源方法：

#我们使用网易的CentOS镜像源

# cd /etc/yum.repos.d/

# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

# vi CentOS6-Base-163.repo

　　编辑文件，把文件里面的$releasever全部替换为版本号，即6 最后保存！或者直接把下面的内存拷贝到CentOS6-Base-163.repo文件中即可（已经修改好）

#########################################################################

# CentOS-Base.repo

#

# The mirror system uses the connecting IP address of the client and the

# update status of each mirror to pick mirrors that are updated to and

# geographically close to the client. You should use this for CentOS updates

# unless you are manually picking other mirrors.

#

# If the mirrorlist= does not work for you, as a fall back you can try the

# remarked out baseurl= line instead.

#

#



[base]

name=CentOS-6 - Base - 163.com

baseurl=http://mirrors.163.com/centos/6/os/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=os

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6



#released updates

[updates]

name=CentOS-6 - Updates - 163.com

baseurl=http://mirrors.163.com/centos/6/updates/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updates

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6



#additional packages that may be useful

[extras]

name=CentOS-6 - Extras - 163.com

baseurl=http://mirrors.163.com/centos/6/extras/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extras

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6



#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-6 - Plus - 163.com

baseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=centosplus

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6



#contrib - packages by Centos Users

[contrib]

name=CentOS-6 - Contrib - 163.com

baseurl=http://mirrors.163.com/centos/6/contrib/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=contrib

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6



#########################################################################

清理yum缓存

# yum clean all

# yum makecache #将服务器上的软件包信息缓存到本地,以提高搜索安装软件的速度

# yum install vim* #测试域名是否可用


5.安装telnet

安装telenet方法

5-1、yum install telnet-server 服务端

5-2、yum install telnet 客户端

5-3、vi /etc/xinetd.d/telnet

service telnet

{

flags = REUSE

socket_type = stream

wait = no

user = root

server = /usr/sbin/in.telnetd

log_on_failure += USERID

disable = yes

}

将disable项由yes改成no。

5-4、/etc/init.d/xinetd restart


命令：

启动：/usr/bin/memcached -d -m 3000 -u root -p 11211 -c 256 -P /var/run/memcached1.pid

关闭：kill `cat /var/run/memcached1.pid`


默认情况下memcached安装到/usr/bin下。



进入安装目录，启动memcached:/usr/memcached/bin/memcached -d -c 10240 -m 1024 -u root


获取运行状态：echo stats | nc localhost 11211(可以查看出pid) 或使用ps -ef|grep memcached


停止memcached：kill -9 pid (-9表示强制杀死,pid 为进程的进程标识符)