1.cd2.pwd3.ls4.passwd5.who6.cat7.mkdir8.rmdir9.chmod10.chown11.chgrp12.touch13.cp14.mv15.rm16.find17.grep18.more19.less20.head21.tail22.cut23.at24.crontab25.sleep26.kill27.pspstree28.top29.expr30.locate31.split33.man，info34.alias35.unalias36.clear