Redirection of output and input in unix/linux
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This document discusses different types of shells, their features, and configuration files. It also covers redirection of input/output in shells. There are several common shells like Bourne, C, TC, Korn, and Bash that vary in their features such as command history, aliases, scripting abilities. Configuration files configure shells and are read during login or interactively. Redirectors like >, >>, <, 2>, 2>&1 are used to control input/output streams and send them to files. Examples show how redirection is used for various purposes like logging output and errors separately.
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The document discusses the three main layers of the Unix operating system: programs/applications/tools which use a language humans can understand, the kernel which interacts with hardware using machine language, and the shell which acts as an intermediary interpreting commands for the kernel. It then focuses on describing the different types of shells, including their origins and key features. The main shells discussed are the Bourne shell, C shell, and Korn shell.
3.1 gnu and unix commands v4
This document provides an overview of core Linux commands and system administration. It covers basic Unix commands for working on the command line, command syntax, command completion, pathname wildcards, shells, and editing commands using the Readline Library. The document is distributed under the GNU Free Documentation License and allows verbatim copying and distribution with or without changes.
Unixshellscript 100406085942-phpapp02
This document provides an overview of Unix shell scripting with ksh/bash. It discusses the goals of the class, which are to learn what problems are suited to shell scripts, review commonly used Unix commands for scripts, and write simple shell scripts. It also lists some assumptions, such as having a basic understanding of commands, navigation, redirection and pipes. The document then provides details on the history of different shells like sh, csh, ksh and bash, and compares their features. It also discusses other scripting languages before focusing on ksh/bash versus sh scripts.
Unix
After completing this section, students should be able to log into the Linux system, understand and manipulate the UNIX file system, describe the role of the shell, use basic file commands like cd, ls, cp, and rm, use standard input/output and piping, and understand the UNIX philosophy. The document provides an introduction to UNIX operating systems, shells, file systems, basic commands, and input/output redirection.
21bUc8YeDzZpE
This document provides an introduction and overview of Linux shell scripting. It begins by explaining key concepts like the kernel, shell, processes, redirection and pipes. It then covers variables, writing and running scripts, quotes, arithmetic, arguments, exit status, wildcards, and basic programming commands like echo, if/test, loops, case. The document concludes with more advanced commands like functions, I/O redirection, traps and examples.
21bUc8YeDzZpE
This document is a tutorial that introduces Linux shell scripting. It covers topics such as the Linux kernel, shells, processes, redirection, variables, conditional statements, loops, functions, and examples of shell scripts. The tutorial is designed for beginners and explains shell programming concepts through examples to make the ideas clear. It also lists common Linux commands for beginners to become familiar with using the shell.
(Ebook) linux shell scripting tutorial
This document provides an introduction and overview of Linux shell scripting. It begins by explaining key concepts like the kernel, shell, processes, redirection and pipes. It then covers variables, writing and running scripts, quotes, arithmetic, arguments, exit status, wildcards, and basic programming commands like echo, if/test, loops, case. The document concludes with more advanced commands like functions, I/O redirection, traps and examples.
21bUc8YeDzZpE
This document provides an introduction and overview of Linux shell scripting. It begins by explaining key concepts like the kernel, shell, processes, redirection and pipes. It then covers variables, writing and running scripts, quotes, arithmetic, arguments, exit status, wildcards, and basic programming commands like echo, if/test, loops, case. The document concludes with more advanced commands like functions, I/O redirection, traps and examples.
Shell & Shell Script
This document provides an overview of Linux, shells, and shell scripts. It begins with a short history of Linux and how it originated from efforts to create an affordable UNIX-like operating system that could run on personal computers. It then defines what a shell is and describes common shell commands. The remainder of the document explains what shell scripts are, how to write them, and includes examples of common scripting elements like variables, conditionals, loops, arithmetic, and file operations.
Linux introduction-commands2338
The document summarizes the contents of a training presentation on the Unix and GNU/Linux command line. It covers shells and command line interpreters, the filesystem structure including common directories, file handling commands like ls, cd, cp, and an introduction to pipes and I/O redirection. Special files and directories like symlinks, devices, and ~ (home directory) are explained. File permissions and ownership are also mentioned.
Linux introduction-commands2338
The document summarizes the contents of a training on the Unix and GNU/Linux command line. It covers shells and command line interpreters, the filesystem structure, file handling commands like ls, cd, cp, and file permissions. It also discusses standard input/output redirection, pipes, process control and environment variables. The training contents are organized into 5 sections covering these topics at an introductory level.
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Redirection of output and input in unix/linux
- 1. Created by
- 3. Summary of shell features
- 7. Summary of shell features
- 11. Summary of shell features
- 15. Summary of shell features
- 19. Summary of shell features
- 22. Thank you for watching my presentation Created by panuausavasereelert blog: http://panu.in.th email: panu@panu.in.th twitter: @panuinth