[Unix] du (abbreviated from ``disk usage``) is a standard Unix program used to estimate file space usage—space used under a particular directory or files on a file system. == History == The du utility first appeared in version 1 of AT&T UNIX. == Specification == By default, the Single Unix Specification (SUS) specifies that du is to displ... Found on http://en.wikipedia.org/wiki/Du_(Unix)
x(Latin) general, leader; this term is linked to the Latin verb duco, to lead; in the Aeneid, Aeneas grows to be comfortable in his position as dux, developing from a man who bemoans his fate and survival at his first appearance in the text to a more confident leader. Found on https://www.encyclo.co.uk/local/10135