摘要：
apt = Advanced Packaging Toolar = archiveras = assemblerawk = "Aho Weiberger and Kernighan" 三个作者的姓的第一个字母bash = Bourne Again SHellbc = Basic (Better) Calculatorbg = BackGroundbin = BINaries（binary)cal = CALendar calendarcat = CATenatecd = Change Directorychgrp = CHange GRouPchmod = CHange M 阅读全文
