ksh

Ksh, short for KornShell, is a command-line shell and scripting language for Unix-like operating systems. Developed by David Korn at AT&T Bell Laboratories in the early 1980s, it is an enhancement and alternative to the Bourne shell. Ksh combines the features of the C shell (csh) and the Bourne shell (sh), providing a rich collection of features and capabilities for command-line users and system administrators. It offers a syntax similar to the C programming language, with additional enhancements, making it a powerful scripting language for automating tasks and writing complex shell scripts. Ksh supports both interactive and non-interactive modes, allowing it to be used for both typical interactive usage and as a scripting language for automating tasks. It includes features like history logging, command completion, command aliasing, and command editing capabilities, allowing users to work efficiently on the command line. Ksh also supports job control, allowing users to manage multiple processes and jobs simultaneously. It has built-in arithmetic evaluation capabilities, allowing for mathematical calculations within shell scripts. Ksh supports the use of variables and arrays, providing flexible options for storing and manipulating data within scripts. It offers a comprehensive set of built-in commands and functions, making it suitable for a wide range of tasks and purposes. Overall, Ksh is a powerful and versatile command-line tool that combines the best features of different shells, providing an efficient and flexible environment for Unix-like systems.