查看CentOS上Apache位置，版本，停止，啟動
查看Apache是否被安裝：

[root@asg11 ~]# find / -name 'httpd'
/etc/sysconfig/httpd
/etc/httpd
/etc/logrotate.d/httpd
/etc/rc.d/init.d/httpd
/var/run/httpd
/var/log/httpd
/var/lock/subsys/httpd
/usr/sbin/httpd
/usr/lib64/httpd

由此確定Apache被安裝的地方是/etc/httpd

查看Apache版本

首先進入httpd所在目錄
[root@asg11 ~]# cd /etc/httpd

進而查看版本
[root@asg11 httpd]# httpd -v
Server version: Apache/2.2.15 (Unix)
Server built: Aug 13 2013 17:29:28

停止httpd
[root@asg11 httpd]# service httpd stop
Stopping httpd: [ OK ]

啟動httpd
[root@asg11 httpd]# service httpd start
Starting httpd: [ OK ]

用瀏覽器訪問試試：

[root@asg11 httpd]#

Apache的重要配置文件httpd.conf的位置在/etc/httpd/conf/httpd.conf

[root@asg11 conf]# pwd
/etc/httpd/conf
[root@asg11 conf]# ls
httpd.conf magic
[root@asg11 conf]#