1，英文版；2，带目录 You'veexperiencedtheshiny,point-and-clicksurfaceofyourLinuxcomputer-nowdivebelowandexploreitsdepthswiththepowerofthecommandline.TheLinuxCommandLinetakesyoufromyourveryfirstterminalkeystrokestowritingfullprogramsinBash,themostpopularLinuxshell