centos7 下安装apache mysql php phpmyadmin。
1 安装mysqlyum -y install mariadb-server
systemctl start mariadb.service
systemctl enable mariadb.service
mysql_secure_installation
默认安装的是5.5.40-MariaDB ，个人喜欢的版本，不再是5.1的那个了。
2 安装apache
yum install -y httpd
systemctl start httpd.service
systemctl enable httpd.service
apache 版本为 2.4.6
3 .安装php
yum -y install php
systemctl restart httpd.service
php5.4
4.安装phpmyadmin
这里直接用 yum install phpmyadmin，前提是epel 源已经被配置好了。
/etc/httpd/conf.d 下多了一个phpMyAdmin.conf 的配置文件。
这里多了一个访问控制
AddDefaultCharset UTF-8
# Apache 2.4
Require ip 114.88.5.47
Require ip 127.0.0.1
Require ip ::1
# Apache 2.2
Order Deny,Allow
Deny from All
Allow from 127.0.0.1
Allow from ::1
也可以看出来，httpd 2.2和2.4是不同的。
5. 其他
其实安装和centos6的版本没啥区别。做了一些软件的升级，但是在启动上面，废弃了原先的/etc/init.d 下面的bash 脚本。而是用了systemctl 这个命令。
相关文件都在 /usr/lib/systemd/system 下面了。看了一下，比之前的bash 脚本简单好多。比如httpd的systemctl文件
cat /usr/lib/systemd/system/httpd.service
Description=The Apache HTTP Server
After=network.target remote-fs.target nss-lookup.target
Type=notify
EnvironmentFile=/etc/sysconfig/httpd
ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND
ExecReload=/usr/sbin/httpd $OPTIONS -k graceful
ExecStop=/bin/kill -WINCH ${MAINPID}
# We want systemd to give httpd some time to finish gracefully, but still want
# it to kill httpd after TimeoutStopSec if something went wrong during the
# graceful stop. Normally, Systemd sends SIGTERM signal right after the
# ExecStop, which would kill httpd. We are sending useless SIGCONT here to give
# httpd time to finish.
KillSignal=SIGCONT
PrivateTmp=true
WantedBy=multi-user.target
还是之前的chkconfig，也集成在systemctl中了。 很简洁 systemctl enablehttpd
systemctl enablehttpd
ln -s '/usr/lib/systemd/system/httpd.service' '/etc/systemd/system/multi-user.target.wants/httpd.service'
做的操作其实是一个软连接。很直观。操作什么直接反馈回来了。
# systemctl statushttpd
httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled)
Active: inactive (dead)
Dec 14 04:19:54 iZ23f0gpuenZ systemd: Reloaded The Apache HTTP Server.
Dec 14 14:49:32 iZ23f0gpuenZ systemd: Stopping The Apache HTTP Server...
Dec 14 14:49:34 iZ23f0gpuenZ systemd: Starting The Apache HTTP Server...
Dec 14 14:49:34 iZ23f0gpuenZ httpd: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 10.168.19...s message
Dec 14 14:49:34 iZ23f0gpuenZ systemd: Started The Apache HTTP Server.
Dec 14 14:50:23 iZ23f0gpuenZ systemd: Stopping The Apache HTTP Server...
Dec 14 14:50:24 iZ23f0gpuenZ systemd: Starting The Apache HTTP Server...
Dec 14 14:50:24 iZ23f0gpuenZ httpd: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 10.168.19...s message
Dec 14 14:50:24 iZ23f0gpuenZ systemd: Started The Apache HTTP Server.
Dec 14 15:37:49 iZ23f0gpuenZ systemd: Stopping The Apache HTTP Server...
Dec 14 15:37:50 iZ23f0gpuenZ systemd: Stopped The Apache HTTP Server.
Hint: Some lines were ellipsized, use -l to show in full.
status 也做的很hi ，什么时候操作过httpd 的服务也一目了然。
centos 7 还做了进一步的升级，比如说加入了firewall ，内置了git 等，做了很实用的升级。更多功能正在摸索中。
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