DescriptionandThis book presents a detailed discussion on basics of Operating system, Linux commands, utilities and Shell programming in easytounderstand language.andConcepts of process management and Investigation, Linux file system, System configuration tools, Shell features, Standard input /output, piping and wildcards, vimadvance text editor, XWindow system and text processing tools are discussed in such a manner that students of all streams namely arts, commerce and science can easily understand such complex subjects without any difficulty.andBash shell and its configuration, file processing and advance topics in user groups and permission are portrayed in a very comprehensive manner to build a strong foundation.andShell programming is explained with maximum number of examples.andFeaturesandandandandandandandAmple number of diagrams are used to illustrate the subject matter for easy understanding.andandandandandandandSolved Test Paper containing objective as well as descriptive questions is added at the end of each chapter so that the readers can evaluate their progress by comparing their answers with the answers given in the book.andandandandandandandandSet of sample papers on the pattern of the past DOEACC ‘A’ Level examination are included at the end of the book.andandandandandandandComprehensive glossary of technical terms and Index are added for easy access to numerous terms needed for understanding the subject matter and finding answers to objective type of questions.andContentsandandandandandOperating System ConceptsandandandandandLinux Ideas and HistoryandandandandandLinux Usage BasicsandandandandandRunning Commands and Getting HelpandandandandandBrowsing the File SystemandandandandandThe XWindow SystemandandandandandUsers, Groups and PermissionsandandandandandAdvanced Topics in Users, Groups and PermissionsandandandandandThe Linux File System in DepthandandandandandVim: An Advanced Text EditorandandandandandStandard I/O and PipesandandandandandUsing the Bash ShellandandandandandText Processing ToolsandandandandandShell ProgrammingandandandandandInvestigating and Managing ProcessandandandandandFinding and Processing FilesandandandandandBasic System Configuration Toolsandandand.