How can I check which services are installed on CentOS?

To view the services installed on a CentOS system, you can use the following command:

1. Show a list of unit files with systemctl.

systemctl list-unit-files

1. list all units in the systemctl

systemctl list-units

1. Show dependencies with systemctl.

systemctl list-dependencies <service-name>

1. list all installed packages
2. web server

rpm -qa | grep httpd

With the above command, you can view all the installed services on a CentOS system along with their dependencies.