Järjestelmäkäskyt

Järjestelmäkäskyt, often translated as system commands or shell commands, are instructions given to a computer's operating system to perform specific tasks. These commands are typically entered into a command-line interface (CLI), also known as a terminal or shell. The operating system interprets these commands and executes them, allowing users to interact with the system at a lower level than graphical user interfaces (GUIs) typically permit.

Common examples of system commands include those for navigating directories (e.g., `cd` for change directory), listing files (`ls` or `dir`), creating new files or directories (`mkdir`, `touch`), copying (`cp`), moving (`mv`), and deleting (`rm`, `del`). More advanced commands can be used for managing processes, configuring network settings, editing text files, and performing system administration tasks.

The specific syntax and available commands can vary significantly between different operating systems, such as Linux, macOS, and Windows. Linux and macOS, based on Unix-like systems, share a common set of commands, while Windows has its own distinct set of commands, though PowerShell has introduced more Unix-like functionalities. System commands are fundamental for system administrators, developers, and power users who need precise control over their computing environment. Scripting these commands into larger sequences allows for automation of repetitive tasks.