Description: Process substitution is a feature in Unix-like operating systems, including Fish Shell, that allows redirecting the output of one command to serve as the input for another. This is achieved using parentheses, where the result of a command is encapsulated and directly used in another context. This functionality is particularly useful for simplifying complex tasks, as it eliminates the need to create temporary files to store intermediate results. For example, instead of running a command that generates a list and then passing that list to another command, everything can be done in a single line. Process substitution not only enhances workflow efficiency but also makes scripts more readable and easier to maintain. This feature integrates smoothly with other shell functionalities, such as autocompletion and variable management, allowing users to perform more advanced operations with less effort. In summary, process substitution is a powerful tool that optimizes command-line interaction, facilitating data manipulation and task execution in programming and system administration environments.
