1. Bash Shell

Bash, or the Bourne Again Shell, is the default shell on most Linux and Unix-like operating systems. It is a widely-used, powerful, and flexible shell that is suitable for a wide range of tasks.

The main features and characteristics of the bash shell are:

• Command history: Bash allows users to easily access and execute previous commands using the up and down arrow keys.
• Job control: Bash supports job control, which allows users to run processes in the background, interrupt them, and resume them.
• Shell scripts: Bash supports shell scripting, which allows users to automate tasks by writing scripts that execute a series of commands.
• Aliases: Bash allows users to create aliases for frequently used commands, which can save time and improve efficiency.

2. Zsh Shell

Zsh, or the Z shell, is a feature-rich and highly customizable shell that is popular among power users. It has a large number of built-in features and supports a wide range of plugins and themes.

• Command completion: Zsh supports programmable command completion, which allows users to customize the way command completions are displayed and triggered.
• Plugins: Zsh supports a wide range of plugins that can add additional features and functionality to the shell.
• Themes: Zsh supports customizable themes that allow users to change the appearance of the shell prompt and other elements.
• Advanced command history: Zsh includes advanced command history features, such as the ability to search and execute previous commands.

3. Fish Shell

Fish, or the Friendly Interactive Shell, is a modern and user-friendly shell that is designed to be easy to use and learn. It has a syntax highlighting the feature and supports auto-suggestions, making it popular among new users.

• Syntax highlighting: Fish includes syntax highlighting, which makes it easier to read and understand scripts by displaying different parts of the code in different colors.
• Auto-suggestions: Fish supports auto-suggestions, which offer suggestions for completing commands as the user types them.
• User-friendly syntax: Fish has a user-friendly syntax that is designed to be easy to learn and use.
• Tab completions: Fish supports tab completions for commands, options, and arguments.

4. Ksh Shell

Ksh, or the Korn Shell, is a shell developed by David Korn at Bell Labs. It is known for its command history feature, which allows users to easily access and execute previous commands.

• Command history: Ksh includes a command history feature that allows users to easily access and execute previous commands.
• Aliases: Ksh allows users to create aliases for frequently used commands, which can save time and improve efficiency.
• Functions: Ksh supports the creation of functions, which are reusable blocks of code that can be called from multiple places in a script.
• Array variables: Ksh supports array variables, which allow users to store and manipulate multiple values in a single variable.

5. Csh Shell

Csh, or the C shell, is a shell that was developed at the University of California, Berkeley. It is similar to the C programming language and is known for its syntax and control structures.

• Syntax and control structures: Csh is based on the C programming language, and its syntax and control structures are similar to those of C.
• Aliases: Csh allows users to create aliases for frequently used commands, which can save time and improve efficiency.
• Command history: Csh includes a command history feature that allows users to easily access and execute previous commands.
• Job control: Csh supports job control, which allows users to run processes in the background, interrupt them, and resume them.

6. Dash Shell

Dash, or the Debian Almquist Shell, is a lightweight and fast shell that is designed to be used as the default shell on Debian-based systems. It is known for its minimalism and speed, and is often used in scripts and other automated tasks.

• Lightweight and fast: Dash is a lightweight and fast shell that is designed to be used as the default shell on Debian-based systems.
• Portable: Dash is portable and can be easily compiled on a wide range of systems.
• Suitable for scripts: Dash is often used in scripts and other automated tasks due to its speed and minimalism.

7. Tcsh Shell

Tcsh, or the TENEX C shell, is a shell that is based on the C shell and includes additional features such as command line editing and programmable completion.

• Command line editing: Tcsh includes command line editing features, such as the ability to use the left and right arrow keys to move the cursor, and the CTRL-R key to search the command history.
• Programmable completion: Tcsh supports programmable completion, which allows users to customize the way command completions are displayed and triggered.
• Aliases: Tcsh allows users to create aliases for frequently used commands, which can save time and improve efficiency.

8. Ash Shell

Ash, or the Almquist Shell, is a lightweight and portable shell that is often used in embedded systems and other resource-constrained environments.

• Lightweight and portable: Ash is a lightweight and portable shell that is often used in embedded systems and other resource-constrained environments.
• Suitable for scripts: Ash is often used in scripts and other automated tasks due to its small size and minimalism.
• POSIX compliance: Ash is compliant with the POSIX shell specification, which makes it suitable for use in scripts that need to be portable across different systems.

9. Psh Shell

Psh, or the Public Domain Korn Shell, is a fork of the Korn shell that includes additional features and improvements. It is known for its portability and compatibility with other shells.

• Command history: Psh includes a command history feature that allows users to easily access and execute previous commands.
• Aliases: Psh allows users to create aliases for frequently used commands, which can save time and improve efficiency.
• Functions: Psh supports the creation of functions, which are reusable blocks of code that can be called from multiple places in a script.
• Portability: Psh is designed to be portable and can be easily compiled on a wide range of systems.

10. Xonsh Shell

Xonsh is a Python-based shell that combines the features of multiple shells and adds additional features such as syntax highlighting and tab completion. It is known for its flexibility and integration with other Python tools.

• Python-based: Xonsh is a Python-based shell that allows users to use Python syntax and libraries in the shell.
• Syntax highlighting: Xonsh includes syntax highlighting, which makes it easier to read and understand scripts by displaying different parts of the code in different colors.
• Tab completions: Xonsh supports tab completions for commands, options, and arguments.
• Integration with other tools: Xonsh can be integrated with other Python tools and libraries, allowing users to leverage their capabilities in the shell.

Wrap Up

These are some of the most popular open-source Linux shells available today. Each shell has its own set of features and characteristics, and the right shell for a specific task will depend on the needs and preferences of the user.

The post 10 Most Popular Open Source Linux Shells appeared first on TecAdmin.

Installing ZSH on Ubuntu

Zsh packages are available under the default apt repositories. So first, update the Apt cache on your system with latest available packages.

sudo apt update 

Then type below command to install zsh shell packages with required dependencies.

sudo apt install zsh

Once the installation completed, let’s check the installed Zsh shell version by running command:

zsh --version

Installing Oh-My-Zsh Plugin

On-My-Zsh plugin provides a large number of customization for the Z shell. So without this plugion Zsh plugin is incomplete. So we also recommend to install this plugin on with Zsh shell.

sudo apt install git-core curl fonts-powerline 

Oh-My-Zsh provides a shell script for the installation on Linux systems. Execute the following command to install this plugion on your system.

sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh)" 

This will ask you to setup Zsh as default set. You can access or reject this as your choice. After that installation will complete within few seconds.

You may like to change Zsh theme by editiog ~/.zshrc file on your system. You can select a theme from here.

sudo vi ~/.zshrc 

Set theme name to ZSH_THEME environment variable.

# Set name of the theme to load --- if set to "random", it will
# load a random theme each time oh-my-zsh is loaded, in which case,
# to know which specific one was loaded, run: echo $RANDOM_THEME
# See https://github.com/ohmyzsh/ohmyzsh/wiki/Themes

ZSH_THEME="agnoster"

Save file and close it. Then launch a new shell to apply changes.

Launch Zsh Shell Terminal

To launch a Zsh shell terminal just type “zsh” from your current shell.

zsh 

Conclusion

In this tutorial, you have learned about installation off Zsh shell on Ubuntu system. Also installed Oh-My-Zsh plugin on your system.

The post How to Install ZSH (Z Shell) on Ubuntu 20.04 appeared first on TecAdmin.