51、Linux Shells: A Comprehensive Comparison

Linux Shells: A Comprehensive Comparison

1. Introduction

In the Linux environment, there is a wide variety of shells available. Choosing the most suitable shell for your needs can be challenging. Sometimes, you may be restricted to using a specific shell and need to determine which features of your default shell’s scripts are available in the new one. This article provides a quick comparison of the features of different commonly used Linux shells.

2. Variables

2.1 Environment Variables

• Uppercase Convention : The bash, dash, ksh93, and zsh shells use all uppercase letters for environment variables. The zsh shell provides both upper - and lower - case environment variables for common variables, so upperca