準備篇

1.配置防火墻，開啟80端口、3306端口

1 vim /etc/sysconfig/iptables

service iptables restart    #重啟防火墻，使配置生效

2.關閉SELINUX（這個和服務器安全相關，先關閉。相關介紹：https://wiki.centos.org/zh/HowTos/SELinux）

vim /etc/selinux/config#SELINUX=enforcing   #注釋掉#SELINUXTYPE=targeted  #注釋掉SELINUX=disabled    #增加:wq           #保存退出  shutdown -r now     #重啟系統

3.安裝第三方源

1)安裝EPEL倉庫

yum install -y epel-release

如果以上命令不起作用：

CentOS/RHEL 7

rpm -Uvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm

CentOS/RHEL 6

rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

2)安裝IUS倉庫

CentOS 6

rpm -Uvh https://centos6.iuscommunity.org/ius-release.rpm

CentOS 7

rpm -Uvh https://centos7.iuscommunity.org/ius-release.rpm

錯誤處理:

1.安裝IUS倉庫出錯：curl: (35) SSL connect error。這個問題在RHEL 6.1 -> RHEL 6.4應該都會出現，原因是curl使用了REST API。解決：

yum update nss

2.結果問題1沒解決，出另一個問題：Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again。解決：

vim /etc/yum.repos.d/CentOS-Base.repo

把有mirrorlist的都注釋掉，有baseurl的都去掉注釋，然后再進行步驟1，再安裝IUS倉庫。修改如下：

[epel]name=Extra Packages for Enterprise Linux 6 - $basearchbaseurl=http://download.fedoraproject.org/pub/epel/6/$basearch#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearchfailovermethod=priorityenabled=1gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6[epel-debuginfo]name=Extra Packages for Enterprise Linux 6 - $basearch - Debugbaseurl=http://download.fedoraproject.org/pub/epel/6/$basearch/debug#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-6&arch=$basearchfailovermethod=priorityenabled=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6gpgcheck=1[epel-source]name=Extra Packages for Enterprise Linux 6 - $basearch - Sourcebaseurl=http://download.fedoraproject.org/pub/epel/6/SRPMS#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-source-6&arch=$basearchfailovermethod=priorityenabled=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6gpgcheck=1

 查看倉庫列表，看看是否安裝成功了：

yum repolist

ius                                                                             | 2.3 kB   00:00   ius/primary_db                                                                       | 183 kB   00:00   repo id                             repo name                                                  statusbase                              CentOS-6 - Base                                               5,062epel                              Extra Packages for Enterprise Linux 6 - i386                                 9,992extras                             CentOS-6 - Extras                                                39ius                               IUS Community Packages for Enterprise Linux 6 - i386                              329updates                             CentOS-6 - Updates                                               382repolist: 15,804