Detailed steps to install and uninstall Apache (httpd) service on centos 7

uninstall

First, confirm whether it has been installed or the system comes with the httpd service, using the following command:

# rpm -qa | grep httpd

or:

# yum list | grep httpd

I have already installed it once, so it will be displayed as follows:

Then I will uninstall my httpd first. First, I need to stop the httpd service. The command is as follows:

# systemctl stop httpd.service

Then you can use the rpm -e or yum -erase command, but the rpm -e command requires you to uninstall the dependent packages first, so I use the yum -erase command to uninstall, the command is as follows:

# yum erase httpd.x86_64

In the middle, you will be asked to confirm, just press y, until Complete! appears, indicating that the uninstallation is complete.

Install

If you want to confirm whether the uninstallation is complete, you can use the list command to list the installed files (the first step of uninstallation). We will not do this here. We will directly list the httpd items in the yum repository with the following command:

# yum list | grep httpd

Then, after seeing the available items, we enter the following command to install it:

# yum install httpd

Enter 'y' in the middle and the installation is complete.

Then we check the running status of httpd through the following command:

# systemctl status httpd.service

If httpd is not started, we can start the service with the following command:

# systemctl start httpd.service

The default www directory is under /var/www/html/, so we write an html file to see what happens. Enter the following command to create a file containing the hello world string:

# echo 'hello world' > /var/www/html/index.html

Then, we use curl to access the local:

# curl 127.0.0.1

Already in normal service!