linuxmessage命令
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Linux中的message命令是用来发送系统消息或广播消息给系统中的所有用户的。它通常被用在系统管理员需要向所有用户发送通知或警告的情况下。
message命令的基本语法格式为:
“`
mesg [options] [usernames]
“`其中,`options`包括:
– `-s`:发送一条短消息。
– `-t`:发送一条提醒消息。`usernames`是要接收消息的用户的用户名。如果不指定用户名,则消息将发送给所有用户。
下面是一些常用的message命令的示例:
1. 发送一条短消息给所有用户:
“`
mesg -s “这是一条系统通知。”
“`2. 发送一条提醒消息给指定用户:
“`
mesg -t username “您有一条新消息,请注意查看。”
“`3. 查看当前消息设置的状态:
“`
mesg
“`message命令的使用需要管理员权限,只有具备sudo权限的用户才能发送消息给其他用户。
需要注意的是,接收消息的用户可能需要在shell中打开`mesg y`命令,才能接收到管理员发送的消息。如果接收用户没有打开mesg服务,就无法接收到消息。
总结一下,message命令是用来发送系统消息或广播消息给系统中的所有用户的。通过指定用户、发送短消息或提醒消息,管理员可以在需要时向用户发送通知或警告。
2年前 -
Linux中的message命令是一个用于向其他用户发送消息的命令。它允许系统用户之间进行实时通信,无需使用第三方通信应用程序。
以下是关于Linux message命令的详细信息:
1. 命令语法
`message [user]`这里的[user]代表你想要发送消息的目标用户。你可以指定一个特定的用户名,也可以使用通配符`*`来发送消息给所有用户。
2. 消息发送权限
只有超级用户(root)才有权限向其他用户发送消息。普通用户只能接收消息而无法发送。3. 消息格式
发送的消息将以以下格式显示在接收方的终端上:
`From user_name@hostname Thu Oct 28 14:11:20 +0800 2021: message_content`其中,user_name是发送方的用户名,hostname是发送方的主机名,Thu Oct 28 14:11:20 +0800 2021是消息发送的时间戳,message_content是实际发送的消息内容。
4. 发送消息给所有用户
要向系统上的所有用户发送消息,可以使用通配符`*`作为[user]的值。例如,`message *`将向所有用户发送消息。5. 接收消息
当有用户向你发送消息时,你将在终端上收到一条消息通知。你可以使用命令`mesg`来开启或关闭消息接收功能。若要开启接收消息功能,可以运行`mesg y`命令;若要关闭接收消息功能,可以运行`mesg n`命令。需要注意的是,message命令只能在本地系统上发送和接收消息,不能跨网络发送消息。并且,message命令在现代Linux系统中已被许多其他更先进的通信工具所替代,比如电子邮件、即时通讯软件等。因此,在实际应用中,message命令的使用并不常见。
2年前 -
Title: Linux Message Command: Methods, Procedures, and Usage
Introduction:
The `message` command in Linux is a useful tool for sending and receiving messages between users on a single system or across a network. In this article, we will explore the `message` command, including its methods, operational procedures, and usage.I. Installation and Setup:
To use the `message` command, make sure it is installed on your Linux system. You can check if it is installed by running the following command:“`
which message
“`If the command returns a path, it means that `message` is installed. Otherwise, you will need to install it using your package manager.
II. Sending a Message:
To send a message using the `message` command, follow these steps:1. Identify the recipient’s username or device name. You can use the `who` or `w` command to obtain a list of available users and their terminal devices.
2. Open a terminal window and type the following command to send a message to a specific user:
“`
message
“`Replace `
` with the actual username or device name of the recipient, and ` ` with the content of your message. III. Receiving Messages:
When a message is sent to you, you will receive a pop-up notification on your screen. To read the message, follow these steps:1. Open a terminal window and type the following command:
“`
message
“`This command will display any new messages sent to you.
2. To reply to a message, type the following command:
“`
message
“`Replace `
` with the username or device name of the sender, and ` ` with your reply. IV. Broadcasting Messages:
You can also broadcast a message to all the users on the system or on a network. To do so, use the following command:“`
message -b
“`Replace `
` with the content of your broadcast message. V. Additional Options:
The `message` command offers several additional options for more specific usage. Here are a few examples:1. `-a` option: Append a message to the recipient’s mailbox instead of displaying a pop-up notification.
“`
message -a
“`2. `-r` option: Request read receipts for your messages.
“`
message -r
“`3. `-t` option: Set a specific time for the message to be sent.
“`
message -tVI. Conclusion:
The `message` command in Linux allows you to send and receive messages conveniently within your system or across a network. By following the installation and operational procedures outlined in this article, you can easily use the `message` command to communicate with other users efficiently.2年前