About Bash 5.0 Manual
This is Edition 5.0, last updated 12 May 2019, of The GNU Bash Reference Manual, for Bash, Version 5.0. Bash contains features that appear in other popular shells, and some features that only appear in Bash. Some of the...
This is Edition 5.0, last updated 12 May 2019, of The GNU Bash Reference Manual, for Bash, Version 5.0.
Bash contains features that appear in other popular shells, and some features that only appear in Bash. Some of the shells that Bash has borrowed concepts from are the Bourne Shell (sh), the Korn Shell (ksh), and the C-shell (csh and its successor, tcsh). The following menu breaks the features up into categories, noting which features were inspired by other shells and which are specific to Bash.
This manual is meant as a brief introduction to features found in Bash. The Bash manual page should be used as the definitive reference on shell behavior.
Table of content
Bash Features
1 Introduction
1.2 What is a shell?
1.1 What is Bash?
2 Definitions
3 Basic Shell Features
3.1 Shell Syntax
3.2 Shell Commands
3.3 Shell Functions
3.4 Shell Parameters
3.5 Shell Expansions
3.6 Redirections
3.7 Executing Commands
3.8 Shell Scripts
4 Shell Builtin Commands
4.1 Bourne Shell Builtins
4.2 Bash Builtin Commands
4.3 Modifying Shell Behavior
4.4 Special Builtins
5 Shell Variables
5.1 Bourne Shell Variables
5.2 Bash Variables
6 Bash Features
6.1 Invoking Bash
6.2 Bash Startup Files
6.3 Interactive Shells
6.4 Bash Conditional Expressions
6.5 Shell Arithmetic
6.6 Aliases
6.7 Arrays
6.8 The Directory Stack
6.9 Controlling the Prompt
6.10 The Restricted Shell
6.11 Bash POSIX Mode
7 Job Control
7.1 Job Control Basics
7.2 Job Control Builtins
7.3 Job Control Variables
8 Command Line Editing
8.1 Introduction to Line Editing
8.2 Readline Interaction
8.3 Readline Init File
8.4 Bindable Readline Commands
8.5 Readline vi Mode
8.6 Programmable Completion
8.7 Programmable Completion Builtins
8.8 A Programmable Completion Example
9 Using History Interactively
9.1 Bash History Facilities
9.2 Bash History Builtins
9.3 History Expansion
10 Installing Bash
10.1 Basic Installation
10.2 Compilers and Options
10.3 Compiling For Multiple Architectures
10.4 Installation Names
10.5 Specifying the System Type
10.6 Sharing Defaults
10.7 Operation Controls
10.8 Optional Features
Appendix A Reporting Bugs
Appendix B Major Differences From The Bourne Shell
B.1 Implementation Differences From The SVR4.2 Shell
Appendix C GNU Free Documentation License
ADDENDUM: How to use this License for your documents
Previous Versions
Here you can find the changelog of Bash 5.0 Manual since it was posted on our website on 2026-04-08 22:32:46.
The latest version is and it was updated on 2026-10-12 22:21:18. See below the changes in each version.
Bash 5.0 Manual version
Updated At: 2020-05-18
Changes: Bash Edition 5.0 Reference Manual
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