Installing Apache using Source code

Webserver:                Nowadays we all are using websites for many cases. The common man does not know about the backend of the...

               Nowadays we all are using websites for many cases. The common man does not know about the backend of the websites.
              The primary function of a web server is to store, process, and deliver web pages to clients. Using the HTTP (HyperText Transport Protocol) client and server will communicate.
              Web server is the first level of the website. When the user searches something like "photo" it will go to the webserver and take the content from the database and shows to the user. which may include images, style sheets, and scripts in addition to the text content.

There were some webservers widely used all over the world. There are Apache, Nginx, Apache Tomcat...etc

Apache webserver:
            Apache webserver is mostly used all over the world. Apache webserver using the protocol(HTTP, HTTPS) communicate client to server.
            Apache HTTP using port 80,443 to communicate the server. 80 was the default port for Http, 443 was the default port for Https.
           We Can Install the Apache using source code or Yum package manager(For RedHat, Centos).
Using Source code Installation There were Six steps have to follow.

1. Download 
            Download the required packages and source code from repositories
2. Extract
           Extract the source code using tar and zip command
3. Configure
           Configure the apache using ./configure --prefix=PREFIX
           PREFIX must be replaced with the filesystem path under which the server should be installed. If PREFIX is not specified, it defaults to /usr/local/apache2
4. Compile and install:
            Make and make install cmd use to compile and install apache
5. Customize:
             vim /etc/systemd/system/httpd.service
6. Test:
            To check httpd running or not using commands if working then check in browser.

Installation process:

1. Run the below command which is used to install all the required packages for the  source code compilation of apache
      [root@linuxhelp1 ~]# yum groupinstall " Development Tools"  -y

Where "y" is the option for yes to install packages continue in installation. Using y option it cannot ask yes or no

2: install pcre and pcre-devel packages it is also required for the apache installation

PCRE-Perl Compatible Regular Expressions

[root@linuxhelp1 ~]# yum install expat-devel pcre pcre-devel openssl-devel -y

3: Download the apache source code along with apr and apr-util from apache website or git repository

Apache httpd -

Apr -

Apr-util -

To get an apache source code from the repository using "Wget" command to get the source code 

[root@linuxhelp1 ~]# wget -O httpd-2.4.28.tar.gz

[root@linuxhelp1 ~]# wget -O apr-1.6.2.tar.gz

[root@linuxhelp1 ~]# wget -O apr-util-1.6.0.tar.gz

4: Extract the downloaded source code

[root@linuxhelp1 ~]# tar -xzf httpd-2.4.28.tar.gz
[root@linuxhelp1 ~]# tar -xzf apr-1.6.2.tar.gz
[root@linuxhelp1 ~]# tar -xzf apr-util-1.6.0.tar.gz

5: We need to place apr,apr-util directory to inside the srclib directory  it is located under HTTPD directory

[root@linuxhelp1 ~]# mv apr-1.6.2 httpd-2.4.28/srclib/apr
[root@linuxhelp1 ~]# mv apr-util-1.6.0 httpd-2.4.28/srclib/apr-util

6: change directory to httpd-2.4.28( which version u installed u can go to that directory)

[root@linuxhelp1 ~]# cd httpd-2.4.28

Compilation of Apache source:

step7: To build a configure script, execute the following buildconf script file as follows.

[root@linuxhelp1 httpd-2.4.28]# ./buildconf 

Step8: Run the configuration command 
           We  Can change the default Apache installation directory path

Here path will be /usr/local/apache2 directory path. 

[root@linuxhelp1 httpd-2.4.28]# ./configure --enable-ssl --enable-so --with-mpm=event --with-included-apr --prefix=/usr/local/apache2

Step9: Execute the make command to prepare the files for the installation of Apache.

[root@linuxhelp1 httpd-2.4.28]# make

step10: Execute the make install command to install Apache in it' s appropriate directory.

[root@linuxhelp1 httpd-2.4.28]# make install

Step 11:Now the Apache is successfully installed on the server from it' s source code. Next, run the httpd -v command to check Apache' s version. An error may appear as shown below.

[root@linuxhelp1 httpd-2.4.28]# httpd -v
bash: httpd: command not found…

step12: To remove that error, create an HTTPD command manually. Create a script file for httpd command under /etc/profile.d/ directory. Enter the following line in the file and save it.

[root@linuxhelp1 httpd-2.4.28]# vim /etc/profile.d/
pathmunge /usr/local/apache2/bin

Step13: The file has been created, now logout from the current session and re-login to reload the profile. Check the Apache version by running the following command

[root@linuxhelp1 ~]# httpd -v
Server version: Apache/2.4.28 (Unix)
Server built:   Oct 13 2017 23:23:07

Step14: Create an init script for managing httpd service. So create a httpd file under /etc/init.d/ directory using vim editor and make the following changes in the file. Save and exit the file.

[root@linuxhelp1 ~]# vim /etc/systemd/system/httpd.service

Description=The Apache HTTP Server

ExecStart=/usr/local/apache2/bin/apachectl -k start
ExecReload=/usr/local/apache2/bin/apachectl -k graceful
ExecStop=/usr/local/apache2/bin/apachectl -k graceful-stop


Step15: reload the system deamon

[root@linuxhelp1 ~]# systemctl daemon-reload

Step16: start and enable and checking the status of the apache httpd service 

[root@linuxhelp1 ~]# systemctl start httpd
[root@linuxhelp1 ~]# systemctl enable httpd
Created symlink from /etc/systemd/system/ to /etc/systemd/system/httpd.service.
[root@linuxhelp1 ~]# systemctl status httpd

Step17: switch to browser type the localhost IP now loading the webpage using apache webserver.

It will show the apache welcome page.

Thus we conclude the installation and configuration of Apache from its Source Code on CentOS 7.







Techie View: Installing Apache using Source code
Installing Apache using Source code
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