Description: Bash subshells are secondary processes created by the Bash shell to execute commands in a separate environment. This allows commands to run in isolation, meaning that any changes to environment variables, the working directory, or the state of the parent shell will not affect the parent shell. Subshells are useful for executing scripts or commands that require a clean environment or for performing operations that should not interfere with the current state of the shell. When a subshell is invoked, a new process is created that inherits the environment of the parent shell, but any modifications made within the subshell do not reflect in the original shell. This provides a way to encapsulate command and script execution, allowing for greater flexibility and control over the execution environment. Subshells can be created using parentheses, such as in `(command)`, or through the use of pipes, where the output of one command is passed as input to another. This feature is fundamental for scripting in shell environments, as it allows developers to effectively manage data flow and the state of the environment during the execution of complex tasks.
