轻诺必寡信，多易必多难。是以圣人犹难之，故终无难矣。He who lightly promises is sure to keep but little faith; he who is continually thinking things easy is sure to find them difficult. Therefore the sage sees difficulty even in what seems easy, and so never has any difficulties.
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On files starting with dot and dash
Those are hidden files, but is really annoying when you type ls -a, use the following command to remove all of them.