在局域网络内很多时候是许多人共用一些机器,但如果多个人同时在使用同一台机器必定会发生一些冲突,比如系统的某些配置被修改,这样引起一些麻烦。那么如果在使用该机器之前,先给登录到该机器的所有其他用户发送一个消息,告诉其他用户(如果已经登录)你将使用该机器。这样如果有其他用户登录到该机器,他们就会收到该信息。这样能有效的避免一些冲突。
一、给指定用户发送消息
首先,可使用w或who命令查看当前登录的用户信息;
然后,使用write命令将信息发送到用户的终端上,用法步骤如下:
1、write + shh登陆用户名+ttyname(例如pts/1)
2、ENTER
3、输入信息(所要发送的消息,中文可能会乱码)。
4、EOF
5、CTRL+D
6、结束
实例:
root# write root pts/1I'll come by at 12:00 to look at your problem.root#.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
然后使用root账号登录,且tty号为pts/1的登录用户终端会收到如下消息:
Message from root@cs2c.com.cn on pts/3 at 10:20 ...I'll come by at 12:00 to look at you problem.EOF
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
二、给指定用户发送消息
给当前登录所有用户发送消息,使用wall(write all的缩写)
实例如下:
首先,你可以通过who命令查看登录到该机器的所有用户。比如:
# whoroot pts/0 Jun 13 04:28 (10.56.226.25)root pts/1 Jun 13 22:32 (10.140.1.37)root pts/2 Jun 13 23:31 (10.140.2.70)root pts/3 Jun 13 23:56 (10.140.2.70).csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
执行who命令,就会返回上面的结果。表示有三个用户登录到该机器,有个用户有两个登录Console。
其次,广播消息
#wall 'I will use this host. If somebody is using it, pls let me know. Thanks a lot.'Broadcast message from root (pts/3) (Fri Jun 13 23:57:13 2008):I will use this host. If somebody is using it, pls let me know. Thanks a lot.
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
执行wall命令,所有登录到该机器的控制台(console)界面上都会收到如上所示的消息。