Is there anything that could help me memorise the argument order of the ln command?

I'll take anything from little helper phrases over shell extensions to replacements written in Rust. I only use the command occasionally, but I need a fool-proof solution. Do you have any tricks to get it right?

@linuxquestions

#AskFedi #Linux

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[–] 14 points 2 years ago

Nope, you will, like me, overwrite your files until the day we die

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  • [–] 11 points 2 years ago (2 children)

    It’s the same as cp or mv. Source dest.

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  • [–] 4 points 2 years ago (1 child)
  • [–] 5 points 2 years ago (1 child)

    Think of it like making a fake copy? Source file is first, symlink is second.

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  • [–] 9 points 2 years ago (1 child)

    @fell @linuxquestions IIRC it is just like with cp:

    cp some_existing_file new_file
    ln -s some_existing_file new_file

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  • [–] 9 points 2 years ago* (1 child)

    I can understand OP's confusion, though.

    For move and copy it's pretty certain which is the 'from' and which is the 'to' - the order intuitively makes sense.

    For symlinks it's more ambiguous based on your personal mental model.

    For example, if you think about symlinks from the perspective of the original file before a link is created, then the original file represents the 'from' and the link is the 'to' (CORRECT)

    But if you are thinking from the perspective of using a link after it's created, then you can easily imagine the symlink as the 'from' - because that's where you start when you follow it, and the target file/dir as the 'to' - because that's where you arrive after following it. (INCORRECT)

    So I totally get the ambiguity.

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  • [–] 9 points 2 years ago* (last edited 2 years ago)

    Link shoots his target before asking for names.

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  • [–] 3 points 2 years ago

    The order is source target, just like with cp. "source" is the existing thing and "target" is the new thing.

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  • [–] 3 points 2 years ago

    I've been using linux for a long time and I still mix it up. I just check tldr before typing the command.

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  • [–] 3 points 2 years ago

    If you're gonna need that only for your machine, you can easily create aliases that can you can remember.

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  • [–] 3 points 2 years ago

    I'm glad to see I'm not the only person who can never remember this. The docs don't help me either, I have to just try stuff

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  • [–] 2 points 2 years ago (1 child)

    I remember it because it has the one-arg form which only takes the target, so that's the first arg. Good luck!

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  • [–] 2 points 2 years ago

    This is the one that works for me, too.

    A link operation is meaningless without a target, so that must come first.

    If you don't specify a name for the link, a reasonable name can be inferred from the target. So, the link name goes last, where it can be potentially omitted.

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  • All this stuff about source and destination and target or whatever hasn't helped me because those terms are too confusing when it comes to what they do with links. I like to think of it as hitching a new car onto a train. ln is the locomotive, the car that's already there comes next, and then you link the new one to it.

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  • [+] 2 points 2 years ago
    [–] 2 points 2 years ago

    You presumably have a common usage for it, why not create an alias for that usage?

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  • [–] 2 points 2 years ago

    I think of it in terms of the cp command: Source first, followed by destination. The last argument is always the new file/link you are creating.

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  • [–] -2 points 2 years ago

    @fell@ma.fellr.net After using unix (mostly not linux!) for 10 years I found that I just knew it and always got it right. I haven't had to think about ln in the last 20 years - my fingers just work. I guess that is one advantage to getting older/wiser. (I'm just hoping I don't get cognitive decline like so many do, though probably I wouldn't for 20-30 more years)

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