保持 SSH 会话处于活动状态 [英] Keep SSH session alive

问题描述

我使用 ssh -p8520 username@remote_host 登录远程服务器.

I use ssh -p8520 username@remote_host to login remote server.

问题:

当我在工作场所时，它始终处于连接状态并正常工作.不幸的是，在我从家里连接到远程服务器后，终端在 10 - 15 分钟内冻结.

It is always connected and works properly when I am in the work place. Unfortunately, terminal freezes in 10 - 15 minutes after I connected with the remote server from home.

控制台上没有错误/超时报告，但光标不能再移动了.

There's no error/timeout report on the console but the cursor cannot move any more.

输入w查看登录用户时，有一些僵尸登录用户，需要手动杀掉.

When enter w to check the login users, some zombies login users are there, and I have to kill them manually.

这很烦人.谁能帮我?

推荐答案

在服务器端运行的 ssh 守护进程 (sshd)，如果客户端进入静默状态(即不发送信息)，则会关闭来自服务器端的连接).为防止连接丢失，请指示 ssh 客户端不时向服务器发送生命迹象信号.

The ssh daemon (sshd), which runs server-side, closes the connection from the server-side if the client goes silent (i.e., does not send information). To prevent connection loss, instruct the ssh client to send a sign-of-life signal to the server once in a while.

此配置在文件$HOME/.ssh/config中，如果文件不存在则创建该文件(配置文件不能是全局可读的，所以运行chmod 600 ~/.ssh/config 创建文件后).每隔例如发送信号四分钟(240 秒)到远程主机，将以下内容放入该配置文件中:

The configuration for this is in the file $HOME/.ssh/config, create the file if it does not exist (the config file must not be world-readable, so run chmod 600 ~/.ssh/config after creating the file). To send the signal every e.g. four minutes (240 seconds) to the remote host, put the following in that configuration file:

Host remotehost
    HostName remotehost.com
    ServerAliveInterval 240

要为所有主机发送keep-alive信号，在配置文件中放置以下内容:

To enable sending a keep-alive signal for all hosts, place the following contents in the configuration file:

Host *
    ServerAliveInterval 240

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