ls-command: how to display the file size?
ls -lah
-l use a long listing format
-a, –all do not hide entries starting with.
-h –human-readable
When used with the -l option, use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the number of digits to three or less using base 2 for sizes.
