Brew update fails wtih fatal: could not read Username

homebrewsoftware-updateterminal

$ brew update
fatal: could not read Username for 'https://github.com': terminal prompts disabled
fatal: could not read Username for 'https://github.com': terminal prompts disabled
Error: homebrew/homebrew-dupes does not exist! Run `brew untap homebrew/homebrew-dupes` to remove it.
homebrew/homebrew-versions does not exist! Run `brew untap homebrew/homebrew-versions` to remove it.

Best Answer

After trying to fix the gitconfig in my local I found out that actually brew was the issue.

For me homebrew-dupes and homebrew-versions caused the problem. But the fix is similar to taps.

Just do

brew tap

which gives you

...
homebrew/dupes
homebrew/versions
...

a simple untap

brew untap homebrew/dupes
brew untap homebrew/versions

after which everything is ok

brew update
Already up-to-date.

Related Solutions

How to work around a “Could not resolve host: (nil)…” error when installing/using Homebrew

Seems that you have problems connecting to github via https.

While I'm not sure what could cause it and how to fix it, you still can use git with another protocol.

Here's the commands to install homebrew in /usr/local/ from scratch using git:// instead of https://:

cd /usr/local/
git init -q
git remote add origin git://github.com/mxcl/homebrew
git fetch origin master:refs/remotes/origin/master -n
git reset --hard origin/master

That should work. Please notice that if you choose to use another directory for homebrew, you probably will have to append its ./bin directory to your environment PATH variable for comfortable usage.

Fatal error after brew update interrupted

Solved. The problem was running $ brew update && brew upgrade together.

It was causing some kind of Git formula conflict.

I ran $ brew update and then $ brew upgrade, formulae were updated and all is good.

Am now able to run both together again.

Best Answer

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How to work around a “Could not resolve host: (nil)…” error when installing/using Homebrew

Fatal error after brew update interrupted

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