These standards codify what is usually needed for the compatibility of applications when they move from one Unix system to another.įSH is intentionally not completely POSIX compliant, aiming instead to address the philosophical inconsistencies that the creators of this shell perceived in the standards. Normally, shells and utility interfaces, along with system and user-level APIs (Application Programming Interfaces) would adhere to a set of standards called the POSIX (Portable Operating System Interface for Unix) specified by the IEEE (Institute of Electrical and Electronics Engineers). More than the pretty colors and the expansive command packages, FSH deals away with clunky architecture the authors of FSH even advertise on their main page: “you’ll never write esac again” (the command in this friendly shell is simply case). In addition, a user is able to run operators directly in the shell, utilizing AND or OR instead of the symbolic versions of & or || found in other shells. Most of these deal with customizing and tailoring the FSH experience for a developer’s unique work style for example, the commands related to history (more on this later). On top of the helpful aesthetic characteristics, there is an entire suite of unique commands packaged with Fish shell. Chief among these features is its extensive UI design which includes autosuggestions, syntax highlighting, tab completion, and selection lists that can be filtered and navigated. Read: An Introduction to Bash Scripting What is FSH?įSH, or Fish as it is affectionately known, is a fully interactive and robust shell aimed to be more feature rich than the two mainstream shell applications, bash or zsh. FSH, the Friendly Interactive Shell, is a Unix-based shell that was created with interactivity and usability as the primary concept of its design. The main ones usually seen are bash and zsh. There are many shells a programmer could take advantage of. This would allow the coder to better manage their software development environment, aiding in a more productive and efficient process.Ī shell is an application that assists a user in operating their computer to launch other applications from within the command line, which is an interpreter. For this reason, a developer should want to pick the right shell to accommodate their style of development. A skilled creator would want to differentiate between picking the right hammer, tool bench, computer, or programming language for the right job and include all the ones that prove necessary for the task at hand. Learn More.įor developers, choosing the right tool could mean the difference between seconds or days of work (the scale naturally varies from job to job). We may make money when you click on links to our partners. content and product recommendations are editorially independent.
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