Check if Apache HTTP Server Package is Installed

Which command would you use to check to see if the httpd package, the Apache HTTP Server package, is installed?

a) yum list installed httpd
b) yum search httpd
c) yum info httpd
d) yum list installed

Answer:

The command 'yum list installed httpd' is used in Linux with RPM package management to check if the Apache HTTP Server package (httpd) is installed.

In the Linux environment that utilizes RPM for package management, it is essential to check if the Apache HTTP Server package (httpd) is installed. The specific command to achieve this is 'yum list installed httpd'.

This command focuses on listing all installed packages, and by adding 'httpd' at the end, it narrows down the search to specifically check for the Apache HTTP Server package within the list of installed packages. If the Apache HTTP Server package is present, it will be displayed in the list generated by the command.

While there are other commands like 'yum search httpd' for locating packages, 'yum info httpd' for detailed package information, and 'yum list installed' without specifying a package for listing all installed packages, the 'yum list installed httpd' command is the most direct way to determine the presence of the Apache HTTP Server package.

It is important to use the correct command to efficiently manage packages in a Linux system and ensure that the necessary software, such as the Apache HTTP Server package, is installed and functioning properly.