1. Check whether it has been installed
[root@d ~]# rpm -qa | grep httpd
system-config-httpd-1.3.3.1-1.el5
httpd-manual-2.2.3-6.el5

2. Stop and uninstall the httpd service that comes with the Linux system
[root@d ~]# service httpd stop
[root@d ~]# ps -ef | grep httpd
[root @ d ~] # kill -9 pid number (delete one by one)
[root@d ~]# rpm -e system-config-httpd-1.3.3.1-1.el5
[root@d ~]# rpm -e httpd-manual-2.2.3-6.el5
Find out if the apache configuration file exists, delete it if it exists
[root@d ~]# find / -name httpd.conf


3. Download the Apache installation package (httpd-2.4.3.tar.gz or httpd-2.2.23.tar.gz), download address: http://httpd.apache.org /
When I installed Apache, I installed it for different versions, which were different at compile time, and the parameters followed by configure were different.
httpd-2.2.23 version compilation command:
[root @ d ~] # ./configure --prefix = / usr / local / apache2 (the installation directory parameters can be directly installed without any parameters)
[root@d ~]# make
[root@d ~]# make install
httpd-2.4.3 version compilation command:
[root@d ~]# ./configure --prefix=/usr/local/apache2 --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util --with-pcre=/usr/local/pcre 
(In addition to specifying the Apache installation directory, also install apr, apr-util, pcre, and specify the parameters)
[root@d ~]# make
[root@d ~]# make install
The problems of apr not found, APR-util not found, pcre-config for libpcre not found occurred when compiling Apache ,
The following is a practical operation to solve these problems of httpd-2.4.3.
http://apr.apache.org/download.cgi download apr-1.4.5.tar.gz, apr-util-1.3.12.tar.gz
http://sourceforge.net/projects/pcre/files/latest/download download pcre-8.31.zip
A. Solve the apr not found problem
  [root@localhost bin]# tar -zxf apr-1.4.5.tar.gz
  [root@localhost apr-1.4.5]# ./configure --prefix=/usr/local/apr
  [root@localhost apr-1.4.5]# make
  [root@localhost apr-1.4.5]# make install
B. Solve the problem of APR-util not found
  [root@localhost bin]# tar -zxf apr-util-1.3.12.tar.gz
  [root@localhost apr-util-1.3.12]# ./configure --prefix=/usr/local/apr-util -with-apr=/usr/local/apr/bin/apr-1-config
  [root@localhost apr-util-1.3.12]# make
  [root@localhost apr-util-1.3.12]# make install
C. Solve the problem of pcre-config for libpcre not found
  [root@localhost ~]# unzip pcre-8.31.zip
  [root@localhost ~]# cd pcre-8.31
  [root@localhost pcre-8.31]# ./configure --prefix=/usr/local/pcre
  [root@localhost pcre-8.31]# make
  [root@localhost pcre-8.31]# make install


If /etc/httpd/httpd.conf already exists, please uninstall or close the web service that comes with the linux system first, execute the command: chkconfig httpd off,
Or you can change the port 80 of the httpd service that comes with Linux to another port, as long as it does not conflict with the port of the Apache service we installed.
Start Apache: / usr / local / apache2 / bin / apachectl start
Stop Apache: / usr / local / apache2 / bin / apachectl stop
Restart Apache: / usr / local / apache2 / bin / apachectl restart


The website is placed in the / usr / local / apache2 / htdocs directory
Pass http: // localhost: 80 in the browser. If you see "It works!" displayed on the page, it means that Apache has passed the verification. If the index suffix of the website is in jsp format,
Then modify the httpd.conf configuration file (/ usr / local / apache2 / conf) and add index.jsp to DirectoryIndex.
# DirectoryIndex: sets the file that Apache will serve if a directory
# is requested.
<IfModule dir_module>
    DirectoryIndex index.html index.php

</IfModule>