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I am trying to repair a friend's USB drive that got a virus. All directories became .lnk and the original ones were hidden. I don't know how to permanently show the folders. I've used sudo chflags nohidden /path but it doesn't work permanently.

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Files & folders that start with a period will always be hidden in the Finder, and in Terminal listings (ls command, unless you use the -a flag i.e. "ls -a"), If renaming the folders is acceptable, then just remove the period from the folders you want to show.

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There are a couple of ways to do this:

In Terminal

To show all hidden files:

defaults write AppleShowAllFiles YES; killall Finder

To hide hidden files:

defaults write AppleShowAllFiles NO; killall Finder

With an application

You can download one of many applications that do this on mouse click. There are many, but the first one that comes up in a google search is Show Hide Invisible Files.

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chflags nohidden should be permanent, but it doesn't affect files that start with a period.

This makes Finder show all hidden files:

defaults write AppleShowAllFiles -bool true; killall Finder
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