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2> pty£¨ÐéÄâÖÕ¶Ë):
µ«ÊÇÈç¹ûÎÒÃÇÔ¶³Ìtelnetµ½Ö÷»ú»òʹÓÃxtermʱ²»Ò²ÐèÒªÒ»¸öÖն˽»»¥Ã´£¿Êǵģ¬Õâ¾ÍÊÇÐéÄâÖÕ¶Ëpty(pseudo-tty)
3> pts/ptmx(pts/ptmx½áºÏʹÓ㬽ø¶øʵÏÖpty):
pts(pseudo-terminal slave)ÊÇptyµÄʵÏÖ·½·¨£¬Óëptmx(pseudo-terminal master)ÅäºÏʹÓÃʵÏÖpty¡£
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