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1，²éÃ÷µÇ½¶Ë¿Ú；
# w
root pts/1 Apr 8 00:06 (172.29.0.29)
root pts/2 Apr 8 04:15 (172.29.0.21)

2，֪ͨ¸ÃÓû§½«Òª¹Ø±ÕËû：
# echo "I will close your connection" > /dev/pts/2
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3，¹Ø±ÕÓû§Á¬½Ó

# fuser -k /dev/pts/2