What is the best safest way to reinstall Homebrew

Question

I am getting issues with permissions in Homebrew  After I installed Node and tried to install npm using the curl command Homebrew tells you to use  it would fail due to EACCESS errors  I checked the node folder and the permissions were a  unowned by a user  I had to chown it  and b  Had no write permissions  I had to chmod 755 it    I ve fixed the issue with NPM  but I had to run its install script as sudo  which is bad     I assume I must have installed Homebrew as root or something similar  I am hoping that reinstallation will fix it  but I can t find a source on how to reinstall Homebrew   When I rerun the installer in Terminal I get    usr local  git already exists

User · Answer

Update 10 11 2020 to reflect the latest brew changes  Brew already provide a command to uninstall itself  this will remove everything you installed with Homebrew    bin bash -c  quot   curl -fsSL https   raw githubusercontent com Homebrew install master uninstall sh  quot   If you failed to run this command due to permission  like run as second user   run again with sudo Then you can install again   bin bash -c  quot   curl -fsSL https   raw githubusercontent com Homebrew install master install sh  quot

User · Answer

For Mac OS X Mojave and above  To Uninstall Homebrew  run following command   sudo ruby -e    curl -fsSL https   raw githubusercontent com Homebrew install master uninstall     To Install Homebrew  run following command   ruby -e    curl -fsSL https   raw githubusercontent com Homebrew install master install     And if you run into Permission denied issue  try running this command followed by install command again   sudo chown -R   whoami  admin  usr local    amp  amp  sudo chmod -R g rwx  usr local

User · Answer

The way to reinstall Homebrew is completely remove it and start over  The Homebrew FAQ has a link to a shell script to uninstall homebrew   If the only thing you ve installed in  usr local is homebrew itself  you can just rm -rf  usr local    usr local  git to clear it out  But  usr local  is the standard Unix directory for all extra binaries  not just Homebrew  so you may have other things installed there  In that case uninstall homebrew sh is a better bet  It is careful to only remove homebrew s files and leave the rest alone

User · Answer

Try running the command     brew doctor and let us know what sort of output you get   edit  And to answer the title question  this is from their FAQ       Homebrew doesn   t write files outside its prefix  So generally you can   just rm -rf the folder you installed it in    So following that up with a clean re-install  following their latest recommended steps  should be your best bet

User · Answer

For me  this one worked without the sudo access   ruby -e    curl -fsSL https   raw githubusercontent com Homebrew install master install    For more reference  please follow https   gist github com mxcl 323731

User · Answer

Process is to clean up and then reinstall with the following commands   rm -rf  usr local Cellar  usr local  git  amp  amp  brew cleanup ruby -e    curl -fsSL https   raw githubusercontent com Homebrew install master install      Notes     Always check curl   bash  or ruby  commands before running them http   brew sh   for installation notes  https   raw githubusercontent com Homebrew install master install  for clean up notes  see  Homebrew is already installed

[macos] What is the best/safest way to reinstall Homebrew?

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