主系统是CentOS，直接用YUM来安装
配置BASE源(CentOS-Base.repo)：
[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
enabled=1
#released updates
[update]
name=CentOS-$releasever - Updates
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
enabled=1
#packages used/produced in the build but not released
[addons]
name=CentOS-$releasever - Addons
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
#baseurl=http://mirror.centos.org/centos/$releasever/addons/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
enabled=1
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
enabled=1
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
#baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
配置三方的YUM源（CentOS-Extend.repo）：[dries]
name=Extra Fedora rpms dries - $releasever - $basearch
baseurl=http://ftp.belnet.be/packages/dries.ulyssis.org/redhat/el4/en/i386/dries/RPMS
gpgcheck=1
enabled=1
[dag]
name=Dag RPM Repository for Red Hat Enterprise Linux
baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag
gpgcheck=1
enabled=1
[kbs-CentOS-Extras]
name=CentOS.Karan.Org-EL$releasever - Stable
gpgcheck=1
gpgkey=http://centos.karan.org/RPM-GPG-KEY-karan.org.txt
enabled=1
baseurl=http://centos.karan.org/el$releasever/extras/stable/$basearch/RPMS/
[kbs-CentOS-Misc]
name=CentOS.Karan.Org-EL$releasever - Stable
gpgkey=http://centos.karan.org/RPM-GPG-KEY-karan.org.txt
gpgcheck=1
enabled=1
baseurl=http://centos.karan.org/el$releasever/misc/stable/$basearch/RPMS/
[kbs-CentOS-Misc-Testing]
name=CentOS.Karan.Org-EL$releasever - Testing
gpgkey=http://centos.karan.org/RPM-GPG-KEY-karan.org.txt
gpgcheck=1
enabled=1
baseurl=http://centos.karan.org/el$releasever/misc/testing/i386/RPMS/
[atrpms]
name=Fedora Core $releasever - $basearch - ATrpms
baseurl=http://dl.atrpms.net/fc$releasever-$basearch/atrpms/stable
gpgkey=http://ATrpms.net/RPM-GPG-KEY.atrpms
gpgcheck=1enabled=1
导入相关的GPG key# rpm --import http://centos.karan.org/RPM-GPG-KEY-karan.org.txt
# rpm --import http://dries.ulyssis.org/rpm/RPM-GPG-KEY.dries.txt
# rpm --import http://dag.wieers.com/packages/RPM-GPG-KEY.dag.txt
# rpm --import http://ATrpms.net/RPM-GPG-KEY.atrpms
如果导入失败可以直接wget到本地导入# rpm --import http://dag.wieers.com/packages/RPM-GPG-KEY.dag.txt
error: http://dag.wieers.com/packages/RPM-GPG-KEY.dag.txt: import read failed.
# wget http://dag.wieers.com/packages/RPM-GPG-KEY.dag.txt
# rpm --import RPM-GPG-KEY.dag.txt
然后直接YUM安装就可以了# yum clean all
# yum update
# yum install openvpn -y
# chkconfig openvpn on
然后把client的相关配置复制到/etc/openvpn/目录下后启动openvpn服务就可以连接到服务器了。
注：
1、管理员发送的OPENVPN Client中的配置经常的后缀是ovpn（xxxx.ovpn）,需要在/etc/openvpn/目录下把它修改为conf后缀（****.conf）
因为openvpn只认conf的配置文件。
2、service openvpn start 启动的是openvpn的服务，但是不一定是openvpn的server，是server还是client是根据/etc/openvpn/下的配置文件决定的，之前就因为想当然的以为是启动server被自己绕了半天。形而上学还是原罪哪。。
Over 记录一下，以备后查。
参考：
http://www.osresources.com/11_6_en.html
http://forums.fedoraforum.org/showthread.php?t=76363
