分享一个linux有趣的功能

大家很多时候也和同事一起使用一台服务器吧，做后台开发的很多时候都用shell吧。现在分享一个整蛊同事的方法：
首先看一下连接服务器的都由谁？

//GD bgl-pub2:/home/d5000/kedong/bin % whod5000    pts/0        2015-06-30 08:21 (192.168.200.5)d5000    pts/1        2015-06-30 08:21 (192.168.200.5)d5000    pts/3        2015-06-30 12:00 (192.168.200.105)d5000    pts/4        2015-06-30 10:31 (192.168.200.38)d5000    pts/6        2015-06-30 10:04 (192.168.200.6)d5000    pts/8        2015-06-30 08:51 (192.168.200.43)d5000    pts/9        2015-06-30 08:53 (192.168.200.43)d5000    pts/10       2015-06-30 09:15 (192.168.200.42)d5000    pts/12       2015-06-30 09:19 (192.168.200.42)d5000    pts/13       2015-06-30 13:25 (192.168.200.38)root     pts/14       2015-06-30 10:04 (127.0.0.1)d5000    pts/15       2015-06-30 10:43 (192.168.200.6)d5000    pts/16       2015-06-30 10:33 (192.168.200.31)d5000    pts/17       2015-06-30 10:34 (192.168.200.6)d5000    pts/18       2015-06-30 10:52 (192.168.200.139)d5000    pts/19       2015-06-30 11:44 (192.168.200.5)d5000    pts/20       2015-06-30 10:44 (192.168.200.139)root     pts/21       2015-06-30 11:40 (127.0.0.1)d5000    pts/22       2015-06-30 12:02 (192.168.200.5)d5000    pts/23       2015-06-30 12:39 (192.168.200.41)d5000    pts/24       2015-06-30 12:50 (192.168.200.42)d5000    pts/25       2015-06-30 13:02 (192.168.200.139)d5000    pts/26       2015-06-30 13:33 (192.168.200.41)d5000    pts/27       2015-06-30 13:35 (192.168.200.139)root     pts/28       2015-06-30 13:36 (127.0.0.1)

很多人，挑个同事整蛊一下，

//GD bgl-pub2:/home/d5000/kedong/bin % write d5000 pts/9handsome boy, about this evening?//GD bgl-pub2:/home/d5000/kedong/bin % write d5000 pts/9          __         /SS\    /$$$$$$$$$$$$\  /$$$$$$$$$$$$$$$$\/$$$$$$$$$$$$$$$$$$$$$\|$$$$$$$$$$$$$$$$$$$$$$\|$$$$$            $$$$| |$$$$ ~M~      ~M~ $$$$||$$$       oo       $$||$$_   '        ' _ $||$$  \   |~~~~|  /  $  |$$    \_______ /  |$$      {----}|$  $ 

同事接到后电脑是这样滴：