1）wall
wall message
[a01@test230 ~]$ wall "I‘m in"
[root@test230 ~]# Broadcast message from a01@test230.ec.office (pts/2) (Thu Dec 25 15:34:52 2014): I‘m in
2）write
write user
message
[a01@test230 ~]$ write root hello, thank you for your help <Ctrl+D>
[root@test230 ~]# Message from root@test230.ec.office (as a01) on pts/2 at 15:37 ... hello, thank you for your help EOF
【资料收集】linux已登录用户用wall,write互发消息
原文地址：http://nosmoking.blog.51cto.com/3263888/1595967
