bash - "Invalid Argument: dirname" in Terminal -

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i noticed issue when first went run

defaults write com.apple.finder appleshowallfiles yes

in macos terminal (10.11.2) returned

bash: /usr/bin/defaults: invalid argument

i'm not sure going on defaults, have similar issue brew:

/bin/bash: /usr/bin/dirname: invalid argument

i broke something, not sure how did or when happened. causing sorts of issues. thoughts on fixing it?

i reinstalled el capitan recovery partition (restart holding command-r), , solved issue. guess xcode command tools blame.


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