Knowing how to check the file size in Unix is a fundamental task for anyone working with files in this operating system. The file size, typically measured in bytes, kilobytes, or megabytes, indicates the amount of storage space occupied by the file on the disk. Determining the file size is essential for various reasons, such as managing storage space, estimating transmission time, and ensuring that files meet specific size requirements.
Unix provides several commands that allow you to check the file size. The most commonly used command is “ls,” which lists files and directories along with their sizes. By default, “ls” displays the file size in bytes. You can use the “-h” option to display the file size in a more human-readable format, such as kilobytes or megabytes. For example, the following command will list the file sizes of all files in the current directory in a human-readable format:
