I am using "brew install fish" to install the fish, but it gave me an error:
brew linkstep did not complete successfully The formula built, but is not symlinked into /usr/local Could not symlink . /usr/local/opt is not writable.
You can try again using: brew link fish
So I did "brew link fish", however it is said
Error: Could not symlink . /usr/local/opt is not writable.
The problem is i don't have /usr/local/opt on my computer, am i missing something? How can I link fish to shell?