The ls command is a Linux shell command that lists directory contents of files and directories. It is one of the most commonly used commands in daily Linux/UNIX operations. By default, ls lists files and directories in alphabetical order. The syntax of the ls command in Linux is `ls .

Some commonly used options in the ls command in Linux include:

• -l: known as a long format that displays detailed information about files and directories.
• -a: represents all files and includes hidden files and directories in the listing.
• -t: sort files and directories by their last modification time, displaying the most recently modified ones first.
• -r: known as reverse order, which is used to reverse the default order of listing.
• -S: sort files and directories by size, displaying the largest ones first.

To view more options and what you can do with ls, you can run ls --help or view the manpages by running man ls .

In summary, the ls command is a powerful tool for listing files and directories in Linux, and it provides valuable information about files, directories, and their attributes.