Show space used by deb packages installed sorted by size (ubuntu, debian and like)

dpkg-query -W -f='${Installed-Size;10}t${Package}n' | sort -k1,1n

Show size of the files and directories sorted by size

du -sk * | sort -rn

du shows the ‘disk usage’ - the space taken up by the files and folders in the current directory.

du -bh | more

A Python function to return readable size using the given size(KB)

# Returns a more readable format of the given data. For example, getReadableSize(1024) returns "1 MB"
	def getReadableSize(size):
		unit = "KB"
		size = float(size)
		final = size

		if(size >= 1024):
			unit = "MB"
			final= "%.02f" % (size / 1024)
			size = (size / 1024)

			if(size >= 1024):
				unit = "GB"
				final= "%.02f" % (size / 1024)
				size = (size / 1024)

		return str(final) + " " + unit

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