1.首先檢視當前賬戶
[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)
查詢每個使用者最近登陸時間lastlog
username port from latest
root pts/7 192.168.1.119 wed nov 9 12:57:40 +0800 2016
2.向所有使用者廣播一跳訊息
[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?
這樣pts/0到pts/6都可以收到這條訊息
3.向指定使用者傳送訊息，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來結束對話
如果不想接收訊息可以使用
[root@weekend01 ~]# mesg n來關閉，這樣除了root之外的資訊就不會接收了
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?
posted on 2016-11-14 10:34收藏
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