rpm is a common package manager for red hat, fedora, centos distro, to find out the command is from which package, you can using rpm -qf, let say you wanna find out “host” is from which package.
rpm -qf `which host`
Take care of the symbol (`) , it is not single quote. For normal keyboard, it is at on top of the tab button. It use to pass a result from one command to another as parameter.
The command line is equivalent to
rpm -qf /usr/bin/host