查找“talk”、“ntalk”和“ytalk”。这些是最接近的。幸运的是，大多数 Unix 机器默认情况下没有运行这样的守护进程，甚至 Windows 在意识到它有多么烦人后，也敏感地默认禁用了该服务。
Look up "talk," "ntalk" and "ytalk." Those are the closest. Fortunately, most Unix machines have no such daemon running by default, and even Windows had the sensibility to disable this service by default after they realized how annoying it is.
Unix was multiuser from the start, so you'd have to specify which user on the target machine you want to message. Then the command would once have been rwrite, but it's all but disappeared. talk (or ytalk, ntalk, etalk) would let the other person reply, but these days instant messaging goes via a centrally managed identity (AIM, Jabber, Skype, etc.) rather than on a machine-to-machine basis.
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查找“talk”、“ntalk”和“ytalk”。这些是最接近的。幸运的是，大多数 Unix 机器默认情况下没有运行这样的守护进程，甚至 Windows 在意识到它有多么烦人后，也敏感地默认禁用了该服务。
Look up "talk," "ntalk" and "ytalk." Those are the closest. Fortunately, most Unix machines have no such daemon running by default, and even Windows had the sensibility to disable this service by default after they realized how annoying it is.
smbclient -M 目的地主机 -U my-host -n my-host
更多信息请参见： http: //www.yolinux.com/TUTORIALS/unix_for_dos_users.html
希望它
也有帮助，尝试“talk”命令。 （talkd也值得研究）
smbclient -M destination-host -U my-host -n my-host
more info here: http://www.yolinux.com/TUTORIALS/unix_for_dos_users.html
hope it helps
also, try the "talk" command. (talkd is worth looking into too)
考虑到您的严格要求（默认安装等），这最接近：
given your strict requirements (default install etc) this comes closest:
Unix 从一开始就是多用户的，因此您必须指定要向目标计算机上的哪个用户发送消息。那么该命令曾经是
rwrite，但它几乎消失了。talk（或ytalk、ntalk、etalk）会让对方回复，但现在即时消息已不再通过集中管理的身份（AIM、Jabber、Skype 等）而不是在机器对机器的基础上。Unix was multiuser from the start, so you'd have to specify which user on the target machine you want to message. Then the command would once have been
rwrite, but it's all but disappeared.talk(orytalk,ntalk,etalk) would let the other person reply, but these days instant messaging goes via a centrally managed identity (AIM, Jabber, Skype, etc.) rather than on a machine-to-machine basis.