Basic Commands and Simple Shell Scripts
Once you have your first Red Hat Enterprise Linux (RHEL) system running, you want to start using it, practicing, and getting comfortable with it. In this chapter, we will review the basics of logging into the system, navigating through it, and getting to know the basics in terms of its administration.
The set of commands and practices described in this chapter will be used on many occasions when managing systems, so it is important to study them with care.
The following topics will be covered in this chapter:
- Logging in as a user and managing multi-user environments
- Changing users with the
sucommand - Understanding users, groups, and basic permissions
- Using the command line, environment variables, and navigating through the filesystem
- Understanding I/O redirection on the command line
- Filtering output with grep and sed
- Listing, creating, copying, and moving files, directories, links, and hard links
- Using...
