但是如上方到后台执行的进程,其父进程还是当前终端shell的进程,而一旦父进程退出,则会发送hangup信号给所有子进程,子进程收到hangup以后也会退出。如果我们要在退出shell的时候继续运行进程,则需要使用nohup忽略hangup信号,或者setsid将将父进程设为init进程(进程号为1) $ echo $$ 21734 $ nohup ./test.sh & [...
&Run a command in the background. It will return the PID of the newly running process to you and won't show you the output.sudo apt update & &&These symbols written together stand for "and". So if you want to run 2 commands together, you can use it.sudo apt update && sudo apt ...
这样的现象被称为在后台(background)运行进程。在后台模式中,进程运行时不会和终端会话上的 STDIN、 STDOUT 以及STDERR 关联。 2.1 后台运行脚本 以后台模式运行shell脚本非常简单。只要在命令后加个& 符就行了。 #!/bin/bash # Test running in the background # count=1 while [ $count -le 10 ] do ...
(./ur_command ${id};echo >&4 ) & # 在后台执行任务ur_command 并将任务 ${id} 赋给当前任务;任务执行完后在fd4种写入一个占位符 done <&4 # 指定fd4为整个for的标准输入 wait # 等待所有在此shell脚本中启动的后台任务完成 exec 4>&- # 关闭管道shell并发函数?
What happens to background jobs after exiting the shell?In which cases is SIGHUP not sent to a...
Shell是Linux内核应用程序,是指“为使用者提供操作界面”的软件,也是命令解析器,它类似于Windows操作系统DOS下的cmd.exe应用程序。它接收用户命令,然后调用相应的应用程序,用户一般管理Linux服务器都是习惯用putty、Xshell、SecureCRT、secure shell等客户端端工具,但是使用这些客户端都是需要在本地安装后才能使用,如果换...
Background Processing It is sometimes useful to get a command to run in the background, and return control to the shell immediately. If the script does not depend upon the … - Selection from Shell Scripting: Expert Recipes for Linux, Bash, and More [Bo
: Yes/No VS Code Version: OS Version: Steps to Reproduce: just 'code .' in WSL linux (Ubuntu) terminal and see that it is running in the foreground. It used to be till very recently in the background, releasing the terminal for other commands, 👍 9 ...
Let’s see the nohup command in action. You can use the nohup with any command you wish to keep running after you exit the shell or terminal. With nohup in the prefix, the job will continue to run. Here’s an example: # nohup ./hello.sh ...
If you’re familiar with Windows, the shell window will look something like a DOS command prompt; the Terminal application in OS X is essentially the same as a Linux shell window. 登录后,打开一个shell窗口(通常称为终端)。 在类似Gnome或Ubuntu Unity的图形界面中,最简单的方法是打开一个终端应用...