What function does the 'ls' command serve in a Linux environment?

The 'ls' command in a Linux environment is an essential and widely used command for displaying the contents of a directory. When executed, it provides a list of files and subdirectories contained within the specified directory, which can be the current directory or another specified path. This command is fundamental for navigating through the filesystem, allowing users to see at a glance what is available in a directory.

The 'ls' command can also be modified with various options to enhance its output, such as displaying hidden files, providing detailed information about each file (like permissions, size, and modification time), or sorting the results in various ways. This versatility makes 'ls' a critical tool for anyone working in a Linux environment, as it assists in understanding the structure of the file system and managing files effectively.