In this chapter, we have really established a baseline of knowledge that we need to begin to understand networking on the RHEL 7 family. To begin with, you learned how to gain and manage privileges on RHEL using su and sudo. Further, we looked at how to restrict the use of su to members of the wheel group with PAM. We have also begun our administration in the way that we mean to continue, using sudo to manage administrative tasks rather than logging in as root or using su.

With the ground knowledge of rights set, we moved on to understand the new naming conventions of network devices on the Red Hat release. We learned why it's preferred, compared to traditional names before moving on to the network configuration.

To configure network interfaces, we can use traditional ifcfg- scripts and these are used by default. We can extend this to additional network profiles that are probably most useful with mobile devices—such as laptops—that connect to different network locations. We saw how...