This book is a beginner’s guide for learning Linux commands which are frequently used by Linux administrators or beginners. The book includes all essential Linux commands as well as their operations, examples and explanations. It also includes Linux helping commands, symbols, shortcut keys, run levels and Vi commands. From this book, you can learn: Operate all essential Linux commands. Copy, move, and delete files and directories. Create, remove, and manage users. Create, remove, and manage groups. Familiar with the run levels and change the run levels Navigate at the command line Compare two files, find out a file, manipulate the file contents Start a job, stop a job and schedule a job. Change permissions and ownership of files and directories Connect across a network and communicate on network Transfer files over network, send network messages And many other skills…… There is a long chart containing complete essential Linux commands in this book, which can give you a great help in your job or study.