Write a Bash script that removes all zero length ordinary files in the directory (including those in the sub-directories at all levels) passed as an optional argument. If you do not specify the directory argument, the script uses the current working directory as the default argument. This problem is for practicing bash programming skills. Though there is an easier way to achieve the goal with the find command, the find command is not allowed to appear in your bash script.

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Linux

An operating system (OS) is the software which manages hardware and resources, like CPU, storage and memory. The OS bridges the applications and hardware and makes the connections between all of your software and the hardware resources.