Centos 下Apache(httpd) 安装过程
其实，网上这块的部署文章非常多 。随便搜索，都有 。
这篇文章，老徐帮大家挑选几个比较重点的过程 & 命令 。
1. 有些 linux 版本中已经预置了有Apache，并且已经是服务了，所有首先检查系统中是否已经存在httpd的服务
1）先检查 服务器 上是否已经启动了此服务 。
命令如下
ps -ef|grep httpd
2）查看linux系统服务中有没有httpd
chkconfig --list | grep httpd
3）如果有服务存在，那么需要先关闭httpd服务自启动
命令 chkconfig httpd off
4）停止httpd服务
命令 service httpd stop
5）再次查看，是否有进程存在
命令 ps -ef|grep httpd
6）如果有进程存在，关闭进程
命令 kill -9 pid
1）先检查 安装包 的名字
命令 rpm -qa|grep httpd
<pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; font-size: 12px; white-space: pre-wrap; display: block; padding: 9.5px; margin: 0px 0px 10px; line-height: 1.38462; color: rgb(51, 51, 51); word-break: break-all; overflow-wrap: break-word; background-color: rgb(245, 245, 245); border: 1px solid rgb(204, 204, 204); border-radius: 4px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">[root@istester]~# rpm -qa|grep httpd
httpd-2.2.15-69.el6.centos.x86_64
httpd-tools-2.2.15-69.el6.centos.x86_64</pre>
2）根据安装包名字删除包
rpm -e httpd-tools-2.2.15-69.el6.centos.x86_64
rpm -e httpd-2.2.15-69.el6.centos.x86_64
3）删除httpd.conf文件
<pre class="prettyprint" style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; font-size: 12px; white-space: pre-wrap; display: block; padding: 9.5px; margin: 0px 0px 10px; line-height: 1.38462; color: rgb(51, 51, 51); word-break: break-all; overflow-wrap: break-word; background-color: rgb(245, 245, 245); border: 1px solid rgb(204, 204, 204); border-radius: 4px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">#先检查文件在哪
find / -name httpd.conf
rm /xxx/xxx/httpd.conf</pre>
3. 准备事项已完成，剩下的就是常规安装了 。
注：我们通过yum的方式，在线安装，非常简单 。
1）检查是否存在httpd包
<pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; font-size: 12px; white-space: pre-wrap; display: block; padding: 9.5px; margin: 0px 0px 10px; line-height: 1.38462; color: rgb(51, 51, 51); word-break: break-all; overflow-wrap: break-word; background-color: rgb(245, 245, 245); border: 1px solid rgb(204, 204, 204); border-radius: 4px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">[www@istester ~]$ yum list httpd
Loaded plugins: security
base | 3.7 kB 00:00
epel | 4.7 kB 00:00
epel/primary_db | 6.0 MB 00:00
extras | 3.4 kB 00:00
extras/primary_db | 28 kB 00:00
updates | 3.4 kB 00:00
updates/primary_db | 3.2 MB 00:00
Available Packages
httpd.x86_64 2.2.15-69.el6.centos base</pre>
2、安装Apache
yum install httpd
<pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; font-size: 12px; white-space: pre-wrap; display: block; padding: 9.5px; margin: 0px 0px 10px; line-height: 1.38462; color: rgb(51, 51, 51); word-break: break-all; overflow-wrap: break-word; background-color: rgb(245, 245, 245); border: 1px solid rgb(204, 204, 204); border-radius: 4px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Total 20 MB/s | 932 kB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : apr-util-ldap-1.3.9-3.el6_0.1.x86_64 1/4
Updating : httpd-tools-2.2.15-69.el6.centos.x86_64 2/4
Installing : httpd-2.2.15-69.el6.centos.x86_64 3/4
Cleanup : httpd-tools-2.2.15-53.el6.centos.x86_64 4/4
Verifying : httpd-tools-2.2.15-69.el6.centos.x86_64 1/4
Verifying : httpd-2.2.15-69.el6.centos.x86_64 2/4
Verifying : apr-util-ldap-1.3.9-3.el6_0.1.x86_64 3/4
Verifying : httpd-tools-2.2.15-53.el6.centos.x86_64 4/4
Installed:
httpd.x86_64 0:2.2.15-69.el6.centos
Dependency Installed:
apr-util-ldap.x86_64 0:1.3.9-3.el6_0.1
Dependency Updated:
httpd-tools.x86_64 0:2.2.15-69.el6.centos
Complete!</pre>
安装过程，不用理会，如果看到如上提示，说明安装成功了。
3、设置Apache服务的启动级别
chkconfig --levels 235 httpd on
Apache是一个服务，所以，可以通过设置服务的启动级别来让它启动。
4、启动服务
两种方式，
1）如下 /etc/init.d/httpd start
2）如下
service httpd start
5、查看服务是否正常启动
两种方式，
1）查看服务状态
<pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; font-size: 12px; white-space: pre-wrap; display: block; padding: 9.5px; margin: 0px 0px 10px; line-height: 1.38462; color: rgb(51, 51, 51); word-break: break-all; overflow-wrap: break-word; background-color: rgb(245, 245, 245); border: 1px solid rgb(204, 204, 204); border-radius: 4px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">[root@istester www]# service httpd status
httpd (pid 10339) is running...</pre>
2）查看进程
<pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; font-size: 12px; white-space: pre-wrap; display: block; padding: 9.5px; margin: 0px 0px 10px; line-height: 1.38462; color: rgb(51, 51, 51); word-break: break-all; overflow-wrap: break-word; background-color: rgb(245, 245, 245); border: 1px solid rgb(204, 204, 204); border-radius: 4px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">[root@istester www]# ps -ef|grep httpd | grep -v grep
root 10339 1 0 23:15 ? 00:00:00 /usr/sbin/httpd
apache 10341 10339 0 23:15 ? 00:00:00 /usr/sbin/httpd
apache 10342 10339 0 23:15 ? 00:00:00 /usr/sbin/httpd
apache 10343 10339 0 23:15 ? 00:00:00 /usr/sbin/httpd
apache 10344 10339 0 23:15 ? 00:00:00 /usr/sbin/httpd
apache 10345 10339 0 23:15 ? 00:00:00 /usr/sbin/httpd
apache 10346 10339 0 23:15 ? 00:00:00 /usr/sbin/httpd
apache 10347 10339 0 23:15 ? 00:00:00 /usr/sbin/httpd
apache 10348 10339 0 23:15 ? 00:00:00 /usr/sbin/httpd</pre>
补充，
1）停止服务
service httpd stop
2）重启服务
service httpd restart
6、安装之后的说明：
1）验证是否安装成功
现在打开 http://ip 地址，看看有没有Apache的默认页面出来了？如果有就对了。
2）安装目录说明
Apache默认将网站的根目录指向 /var/www/html
默认的主配置文件是 /etc/httpd/conf/httpd.conf
配置存储在的/etc/httpd/conf.d/目录
End
文 / IDO老徐
