用centos自帶的yum源來安裝nginx，mysql和php，超級方便，省去編譯的麻煩，省去自己配置的麻煩，還能節省非常多的時間。
我們先把yum源換成國內的阿里雲鏡像源（當然不換也可以），先備份一下原來的源鏡像文件，以免出錯后可以恢復：
[root@192 ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
下載新的CentOS-Base.repo 到/etc/yum.repos.d/，版本根據自己的系統版本選擇下載：
CentOS 5 wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo
CentOS 6 wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
CentOS 7 wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
更改/etc/yum.repos.d/CentOS-Media.repo使其為不生效：
enabled=0
運行yum makecache生成緩存:
yum clean all
yum makecache
yum update
安裝Nginx
由於yum源中沒有我們想要的nginx，那么我們就需要創建一個“/etc/yum.repos.d/nginx.repo”的文件，其實就是新增一個yum源。
[root@192 yum.repos.d]# vi /etc/yum.repos.d/nginx.repo
把如下內容復制進去：
[nginx] name=nginx repo baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=0 enabled=1
然后保存退出，輸入 yum list nginx 查看，
[root@192 yum.repos.d]# yum list nginx 已加載插件：fastestmirror nginx | 2.9 kB 00:00:00 nginx/7/x86_64/primary_db | 18 kB 00:00:04 Loading mirror speeds from cached hostfile * base: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com 可安裝的軟件包 nginx.x86_64 1:1.10.2-1.el7.ngx nginx [root@192 yum.repos.d]# yum list |grep nginx nginx.x86_64 1:1.10.2-1.el7.ngx nginx nginx-debug.x86_64 1:1.8.0-1.el7.ngx nginx nginx-debuginfo.x86_64 1:1.10.2-1.el7.ngx nginx nginx-module-geoip.x86_64 1:1.10.2-1.el7.ngx nginx nginx-module-geoip-debuginfo.x86_64 1:1.10.2-1.el7.ngx nginx nginx-module-image-filter.x86_64 1:1.10.2-1.el7.ngx nginx nginx-module-image-filter-debuginfo.x86_64 1:1.10.2-1.el7.ngx nginx nginx-module-njs.x86_64 1:1.10.2.0.0.20160414.1c50334fbea6-2.el7.ngx nginx nginx-module-njs-debuginfo.x86_64 1:1.10.2.0.0.20160414.1c50334fbea6-2.el7.ngx nginx nginx-module-perl.x86_64 1:1.10.2-1.el7.ngx nginx nginx-module-perl-debuginfo.x86_64 1:1.10.2-1.el7.ngx nginx nginx-module-xslt.x86_64 1:1.10.2-1.el7.ngx nginx nginx-module-xslt-debuginfo.x86_64 1:1.10.2-1.el7.ngx nginx nginx-nr-agent.noarch 2.0.0-10.el7.ngx nginx pcp-pmda-nginx.x86_64 3.10.6-2.el7 base [root@192 yum.repos.d]#
如果執行命令是這樣的顯示效果，那么我們的nginx的yum源就配置成功啦！
然后要安裝我們的nginx就直接執行：
yum -y install nginx
這樣nginx的最新官網版本就安裝好了！
啟動nginx：
# nginx #啟動nginx # curl 127.0.0.1
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style> body { width: 35em; margin: 0 auto; font-family: Tahoma, Verdana, Arial, sans-serif; } </style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and working. Further configuration is required.</p>
<p>For online documentation and support please refer to <a href="http://nginx.org/">nginx.org</a>.<br/> Commercial support is available at <a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
安裝MySQL 5.7版本，官網http://dev.mysql.com/downloads/repo/yum/
rpm -Uvh http://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
可以看到已經有了，並且5.7版本已經啟用，可以直接安裝：
root@192 yum.repos.d]# yum repolist all | grep mysql mysql-connectors-community/x86_64 MySQL Connectors Community 啟用: 24 mysql-connectors-community-source MySQL Connectors Community - Sourc 禁用 mysql-tools-community/x86_64 MySQL Tools Community 啟用: 38 mysql-tools-community-source MySQL Tools Community - Source 禁用 mysql-tools-preview/x86_64 MySQL Tools Preview 禁用 mysql-tools-preview-source MySQL Tools Preview - Source 禁用 mysql55-community/x86_64 MySQL 5.5 Community Server 禁用 mysql55-community-source MySQL 5.5 Community Server - Sourc 禁用 mysql56-community/x86_64 MySQL 5.6 Community Server 禁用 mysql56-community-source MySQL 5.6 Community Server - Sourc 禁用 mysql57-community/x86_64 MySQL 5.7 Community Server 啟用: 146 mysql57-community-source MySQL 5.7 Community Server - Sourc 禁用 mysql80-community/x86_64 MySQL 8.0 Community Server 禁用 mysql80-community-source MySQL 8.0 Community Server - Sourc 禁用 [root@192 yum.repos.d]#
如果沒有開啟，或者你想要選擇需要的版本進行安裝，修改 /etc/yum.repos.d/mysql-community.repo，選擇需要的版本把enable改為1即可，其它的改為0：
修改好后查看可用的安裝版本：
[root@192 yum.repos.d]# yum repolist enabled | grep mysql mysql-connectors-community/x86_64 MySQL Connectors Community 24 mysql-tools-community/x86_64 MySQL Tools Community 38 mysql57-community/x86_64 MySQL 5.7 Community Server 146
不用猶豫，開始安裝吧！
yum -y install mysql-community-server
……經過漫長的等待后，看到下圖所示：
開始啟動mysql：
service mysqld start Redirecting to /bin/systemctl start mysqld.service
看下mysql的啟動狀態：
[root@192 yum.repos.d]# service mysqld status Redirecting to /bin/systemctl status mysqld.service ● mysqld.service - MySQL Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled) Active: active (running) since 日 2016-10-23 22:51:48 CST; 3min 14s ago Process: 36884 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS) Process: 36810 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS) Main PID: 36887 (mysqld) CGroup: /system.slice/mysqld.service └─36887 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid 10月 23 22:51:45 192.168.0.14 systemd[1]: Starting MySQL Server... 10月 23 22:51:48 192.168.0.14 systemd[1]: Started MySQL Server. 10月 23 22:52:24 192.168.0.14 systemd[1]: Started MySQL Server.
開機啟動設置：
systemctl enable mysqld systemctl daemon-reload
mysql安裝完成之后，在/var/log/mysqld.log文件中給root生成了一個默認密碼。通過下面的方式找到root默認密碼，然后登錄mysql進行修改：
[root@192 yum.repos.d]# grep 'temporary password' /var/log/mysqld.log 2016-10-23T14:51:45.705458Z 1 [Note] A temporary password is generated for root@localhost: a&sqr7dou7N_
mysql -uroot -p
修改root密碼：
ALTER USER 'root'@'localhost' IDENTIFIED BY 'NewPassWord!';
注意：mysql5.7默認安裝了密碼安全檢查插件，默認密碼檢查策略要求密碼必須包含：大小寫字母、數字和特殊符號，並且長度不能少於8位。否則會提示ERROR 1819 (HY000): Your password does not satisfy the current policy requirements錯誤，如下圖所示：
通過msyql環境變量可以查看密碼策略的相關信息：
mysql> show variables like '%password%'; +---------------------------------------+--------+
| Variable_name | Value |
+---------------------------------------+--------+
| default_password_lifetime | 0 |
| disconnect_on_expired_password | ON |
| log_builtin_as_identified_by_password | OFF |
| mysql_native_password_proxy_users | OFF |
| old_passwords | 0 |
| report_password | |
| sha256_password_proxy_users | OFF |
| validate_password_check_user_name | OFF |
| validate_password_dictionary_file | |
| validate_password_length | 8 |
| validate_password_mixed_case_count | 1 |
| validate_password_number_count | 1 |
| validate_password_policy | MEDIUM |
| validate_password_special_char_count | 1 |
+---------------------------------------+--------+
14 rows in set (0.00 sec)
validate_password_policy：密碼策略，默認為MEDIUM策略
validate_password_dictionary_file：密碼策略文件，策略為STRONG才需要
validate_password_length：密碼最少長度
validate_password_mixed_case_count：大小寫字符長度，至少1個
validate_password_number_count ：數字至少1個
validate_password_special_char_count：特殊字符至少1個
上述參數是默認策略MEDIUM的密碼檢查規則。
修改密碼策略
如果想修改密碼策略，在/etc/my.cnf文件添加validate_password_policy配置：
# 選擇0（LOW），1（MEDIUM），2（STRONG）其中一種，選擇2需要提供密碼字典文件 validate_password_policy=0
配置默認編碼為utf8
修改/etc/my.cnf配置文件，在[mysqld]下添加編碼配置，如下所示：
[mysqld] character_set_server=utf8 init_connect='SET NAMES utf8'
重新啟動mysql服務使配置生效：
systemctl restart mysqld
添加遠程登錄用戶
默認只允許root帳戶在本地登錄，如果要在其它機器上連接mysql，必須修改root允許遠程連接，或者添加一個允許遠程連接的帳戶，為了安全起見，我們添加一個新的帳戶：
mysql> GRANT ALL PRIVILEGES ON *.* TO 'evai'@'%' IDENTIFIED BY '@evai2016' WITH GRANT OPTION;
mysql> FLUSH PRIVILEGES;
這樣遠程就可以用賬戶名為evai，密碼為@evai2016來登錄數據庫了，運行 select host, user from mysql.user 查看下：
mysql> select host,user from mysql.user; +-----------+-----------+
| host | user |
+-----------+-----------+
| % | evai |
| localhost | mysql.sys |
| localhost | root |
+-----------+-----------+
3 rows in set (0.00 sec)
安裝PHP7
rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
執行命令安裝php7：
yum install php70w.x86_64 php70w-cli.x86_64 php70w-common.x86_64 php70w-gd.x86_64 php70w-ldap.x86_64 php70w-mbstring.x86_64 php70w-mcrypt.x86_64 php70w-mysql.x86_64 php70w-pdo.x86_64
安裝php-fpm：
yum install php70w-fpm php70w-opcache
啟動php-fpm：
systemctl start php-fpm
修改 /etc/nginx/conf.d/default.conf 文件，找到下面這段並改為如下所示：
location ~ \.php$ { root /usr/share/nginx/html; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; }
接着到 /usr/share/nginx/html 目錄下創建一個test.php文件，內容為phpinfo():
vi /usr/share/nginx/html/test.php #內容 <?php phpinfo();
保存退出。接着重啟nginx：
nginx -s reload
打開瀏覽器，看到如下圖說明運行成功：
至此環境搭建完成。