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  • Linux终端下对话

    1.首先查看当前账户

    [hadoop@weekend01 ~]$ who
    hadoop   tty1         2016-11-14 09:31 (:0)
    hadoop   pts/0        2016-11-14 09:32 (:0.0)
    hadoop   pts/1        2016-11-14 09:35 (:0.0)
    hadoop   pts/2        2016-11-14 09:35 (:0.0)
    hadoop   pts/3        2016-11-14 09:35 (:0.0)
    hadoop   pts/4        2016-11-14 09:35 (:0.0)
    hadoop   pts/5        2016-11-14 09:35 (:0.0)
    hadoop   pts/6        2016-11-14 09:35 (:0.0)

    查询每个用户最近登陆时间lastlog

    Username         Port     From             Latest
    root             pts/7    192.168.1.119    Wed Nov  9 12:57:40 +0800 2016

    2.向所有用户广播一跳消息

    [hadoop@weekend01 ~]$ wall "Hello,everyone I am sishen,what's your name?"

    Broadcast message from hadoop@weekend01 (pts/0) (Mon Nov 14 10:01:59 2016):

    Hello,everyone I am sishen,what's your name?

    [hadoop@weekend01 ~]$
    Broadcast message from hadoop@weekend01 (pts/0) (Mon Nov 14 10:01:59 2016):

    Hello,everyone I am sishen,what's your name?
    这样pts/0到pts/6都可以收到这条消息

    3.向指定用户发送消息,使用write命令

    [hadoop@weekend01 ~]$ who
    hadoop   tty1         2016-11-14 09:31 (:0)
    hadoop   pts/0        2016-11-14 09:32 (:0.0)
    hadoop   pts/1        2016-11-14 10:08 (:0.0)
    hadoop   pts/2        2016-11-14 10:08 (:0.0)
    hadoop   pts/3        2016-11-14 10:08 (:0.0)
    hadoop   pts/4        2016-11-14 10:08 (:0.0)
    hadoop   pts/5        2016-11-14 10:08 (:0.0)
    hadoop   pts/6        2016-11-14 10:08 (:0.0)
    root     pts/7        2016-11-14 10:08 (192.168.1.119)
    root     pts/8        2016-11-14 10:20 (192.168.1.119)
    root     pts/9        2016-11-14 10:19 (192.168.1.119)
    root     pts/10       2016-11-14 10:21 (weekend06)

    [root@weekend06 ~]# ssh weekend01

    [hadoop@weekend01 ~]$ write root pts/10
    Hello,I am sishen,What's your name?

    [root@weekend01 ~]#
    Message from root@weekend01 (as hadoop) on pts/9 at 10:21 ...
    Hello,I am sishen,What's your name?

    使用Ctrl+d来结束对话

    如果不想接收消息可以使用

    [root@weekend01 ~]# mesg n来关闭,这样除了root之外的信息就不会接收了

    也可以使用

    [hadoop@weekend01 ~]$ who
    hadoop   tty1         2016-11-14 09:31 (:0)
    hadoop   pts/0        2016-11-14 09:32 (:0.0)
    hadoop   pts/1        2016-11-14 10:08 (:0.0)
    hadoop   pts/2        2016-11-14 10:08 (:0.0)
    hadoop   pts/3        2016-11-14 10:08 (:0.0)
    hadoop   pts/4        2016-11-14 10:08 (:0.0)
    hadoop   pts/5        2016-11-14 10:08 (:0.0)
    hadoop   pts/6        2016-11-14 10:08 (:0.0)
    [hadoop@weekend01 ~]$ echo  "hello ,what are you doing?" >/dev/pts/3

    [hadoop@weekend04 ~]$ hello ,what are you doing?

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  • 原文地址:https://www.cnblogs.com/zd520pyx1314/p/6060946.html
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