Overview of Square Brackets in Bash
In Bash, square brackets are used for test constructs. There are two main forms:
- Single square brackets
[] - Double square brackets
[[]]
While single square brackets are POSIX compliant and widely used, double square brackets are more powerful and provide additional features specific to Bash.
Using Square Brackets in Bash
Square brackets ([ and ]) are essential components in Bash scripting. They are used for a variety of purposes, including conditional expressions, string and numerical comparisons, and file tests. This article provides a comprehensive overview of square brackets in Bash, exploring their uses and functionalities.