即使在启动它的外壳终止的情况下，如何在仍将存在的外壳中启动作业 [英] How to launch a job in a shell which will persist even if the shell which launches it terminates

问题描述

我如何在Linux shell中执行一项工作，以便即使启动它的shell终止，该工作仍将继续存在?

How do I lauch a job in a Linux shell, so that even if the shell which launches it terminates, this job will still persist?

更具体地说，我正在尝试在进程上运行strace.如果我在终端机上运行，​​它将运行完美.但是，我想在一个远程外壳程序中执行此操作，该外壳程序将在所有命令执行完毕后立即停止. "strace -p pid &"没有任何作用，因为当shell停止时，后台作业也会被杀死.

More specifically, I am trying to run strace on a process. It runs perfectly if I do it in a terminal. However, I want to do it in a remote shell which will stop as soon as all the commands have been executed. "strace -p pid &" doesn't have any effect because when the shell stops, the background job also gets killed.

我应该怎么做?

nohup似乎是我要寻找的东西.但是，ssh user@remote_machine script_name似乎也没有任何作用.在脚本中，我有"nohup strace -p pid"

nohup seems to be thing I am looking for. However, ssh user@remote_machine script_name doesn't seem to have any effect neither. In the script I have "nohup strace -p pid"

非常感谢！

推荐答案

Nohup和Screen可以用于运行命令，即使会话断开连接或用户注销也是如此.我都使用它们，但是屏幕"更好.

Nohup and Screen can be used to run a command even if the session is disconnected or the user logs out. I use them both, but "Screen" is better.

nohup ./<script_name> &

如何使用屏幕?

创建任务

$ screen -S task

在任务窗口中执行命令，如果任务未完成，请使用

Execute a command in the task window，if your task not finished, use

$ Ctrl+a+d
to save the task. It will show the following info:
[detached]

如果您的任务已完成，请使用退出"退出屏幕:

if your task has been finished, use "exit" to exit screen:

    $ exit

[screen is terminating]

您可以使用screen -ls查找任何屏幕信息:

You can use screen -ls to find any screen info:

$ screen -ls
There is a screen on:
10000.task (Detached)

使用"screen -r"恢复任务:

Use "screen -r" to recover the task:

$ screen -r 10000

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