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What are some of your most useful or favorite terminal commands? (literature.cafe)
submitted 10 months ago by to c/linux@programming.dev
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OQB @marighost@piefed.social

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[–] 24 points 10 months ago* (7 children)

I have a script named d in my PATH and it contains this:

("$@" > /dev/null 2>&1 &)

It allows me to run any program in a fully detached state in a way that works even if the terminal that started the program closes, and it's as simple as d <command>.

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  • [–] 5 points 10 months ago (2 children)

    Shouldn't you end with & disown to fully detach?

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  • [–] 3 points 10 months ago* (1 child)

    IIRC disown is a shell built-in command, so its use is a bit limited. Not sure if & is also a built-in, but I found disown to not work in some situations. Besides, it's shorter.

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  • [–] 2 points 10 months ago

    shell built-in command

    After looking into it a bit more, its at least a builtin for bash but is otherwise not POSIX. I guess nohup ... & would be the POSIX compliant equivalent, though still not a builtin.

    Its my understanding that & backgrounds, not necessarily detaches, a process -- if the parent process closes, I think the background tasks would still be wait()ed on, if only using &.

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  • [–] 3 points 10 months ago (2 children)

    How does this even work? I get the redirection part, but how is the command executed in a detached state?

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  • [–] 4 points 10 months ago

    () creates a subshell, and & runs the command in background. The $@ means everything after the first argument, so the <command> is executed like a normal command. I am not sure why this works, but it has worked more consistently than nohup, disown, and it's a lot shorter than most other solutions.

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