ABSTRACT
The Linux operating system is most famous for its text-based command execution, but in the 21st century it has a competitively developed graphical user interface (GUI) environment as well. This chapter serves the basic structure of a character user interface (CUI) Linux command. It describes how to connect and log on to a computer running the Linux operating system. The chapter explains how to manage and maintain files and directories and shows where to get online help for Linux commands. It demonstrates the use of a beginner's set of utility commands and also describes what a Linux shell is. The chapter covers the following basic commands and operators:alias, biff, cal, cat, cd, chsh, cp, csh, echo, exit, hostname, login, logout, lp, lpr, ls, man, mesg, mkdir, more, mv, passwd, PATH, pg, pwd, rm, rmdir, set, ssh, su, sudo, talk, telnet, unalias, uname, whatis, whereis, who, whoami, write.
