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Update Common-Issues.md
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EricFromCanada
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This is a list of commonly encountered problems, known issues, and their solutions.
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## Running `brew`
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### `brew` complains about absence of "Command Line Tools"
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You need to have the Xcode Command Line Utilities installed (and updated): run `xcode-select --install` in the terminal.
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### Ruby: `bad interpreter: /usr/bin/ruby^M: no such file or directory`
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You cloned with `git`, and your Git configuration is set to use Windows line endings. See this page: <https://help.github.com/articles/dealing-with-line-endings>
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You cloned with `git`, and your Git configuration is set to use Windows line endings. See this page on [configuring Git to handle line endings](https://docs.github.com/en/get-started/getting-started-with-git/configuring-git-to-handle-line-endings).
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### Ruby: `bad interpreter: /usr/bin/ruby`
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@ -34,45 +36,38 @@ git clean -fd
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### `launchctl` refuses to load launchd plist files
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When trying to load a plist file into launchctl, you receive an error that resembles
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When trying to load a plist file with `launchctl`, you receive an error that resembles either:
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```
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Bug: launchctl.c:2325 (23930):13: (dbfd = open(g_job_overrides_db_path, [...]
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launch_msg(): Socket is not connected
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```
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Bug: launchctl.c:2325 (23930):13: (dbfd = open(g_job_overrides_db_path, [...]
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launch_msg(): Socket is not connected
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or
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or:
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```
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Could not open job overrides database at: /private/var/db/launchd.db/com.apple.launchd/overrides.plist: 13: Permission denied
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launch_msg(): Socket is not connected
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```
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Could not open job overrides database at: /private/var/db/launchd.db/com.apple.launchd/overrides.plist: 13: Permission denied
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launch_msg(): Socket is not connected
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These are likely due to one of four issues:
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1. You are using iTerm. The solution is to use Terminal.app when interacting with `launchctl`.
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2. You are using a terminal multiplexer such as `tmux` or `screen`. You should interact with `launchctl` from a separate Terminal.app shell.
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3. You are attempting to run `launchctl` while logged in remotely. You should enable screen sharing on the remote machine and issue the command using Terminal.app running on that machine.
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4. You are `su`'ed as a different user.
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1. You are using a terminal multiplexer such as `tmux` or `screen`. You should interact with `launchctl` from a separate Terminal.app shell.
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1. You are attempting to run `launchctl` while logged in remotely. You should enable screen sharing on the remote machine and issue the command using Terminal.app running on that machine.
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1. You are `su`'ed as a different user.
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### `brew upgrade` errors out
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When running `brew upgrade`, you see something like this:
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```
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$ brew upgrade
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Error: undefined method `include?' for nil:NilClass
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Please report this bug:
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https://docs.brew.sh/Troubleshooting
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/usr/local/Library/Homebrew/formula.rb:393:in `canonical_name'
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/usr/local/Library/Homebrew/formula.rb:425:in `factory'
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/usr/local/Library/Contributions/examples/brew-upgrade.rb:7
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/usr/local/Library/Contributions/examples/brew-upgrade.rb:7:in `map'
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/usr/local/Library/Contributions/examples/brew-upgrade.rb:7
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/usr/local/bin/brew:46:in `require'
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/usr/local/bin/brew:46:in `require?'
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/usr/local/bin/brew:79
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```
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Error: undefined method `include?' for nil:NilClass
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Please report this bug:
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https://docs.brew.sh/Troubleshooting
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/usr/local/Library/Homebrew/formula.rb:393:in `canonical_name'
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/usr/local/Library/Homebrew/formula.rb:425:in `factory'
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/usr/local/Library/Contributions/examples/brew-upgrade.rb:7
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/usr/local/Library/Contributions/examples/brew-upgrade.rb:7:in `map'
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/usr/local/Library/Contributions/examples/brew-upgrade.rb:7
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/usr/local/bin/brew:46:in `require'
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/usr/local/bin/brew:46:in `require?'
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/usr/local/bin/brew:79
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This happens because an old version of the upgrade command is hanging around for some reason. The fix:
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@ -84,42 +79,40 @@ git clean -f # this will remove untracked files
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### Python: `easy-install.pth` cannot be linked
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```
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Warning: Could not link <formula>. Unlinking...
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Error: The `brew link` step did not complete successfully
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The formula built, but is not symlinked into /usr/local
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You can try again using `brew link <formula>'
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Warning: Could not link <formula>. Unlinking...
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Error: The `brew link` step did not complete successfully
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The formula built, but is not symlinked into /usr/local
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You can try again using `brew link <formula>'
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Possible conflicting files are:
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/usr/local/lib/python2.7/site-packages/site.py
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/usr/local/lib/python2.7/site-packages/easy-install.pth
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==> Could not symlink file: /homebrew/Cellar/<formula>/<version>/lib/python2.7/site-packages/site.py
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Target /usr/local/lib/python2.7/site-packages/site.py already exists. You may need to delete it.
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To force the link and overwrite all other conflicting files, do:
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brew link --overwrite formula_name
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Possible conflicting files are:
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/usr/local/lib/python2.7/site-packages/site.py
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/usr/local/lib/python2.7/site-packages/easy-install.pth
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==> Could not symlink file: /homebrew/Cellar/<formula>/<version>/lib/python2.7/site-packages/site.py
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Target /usr/local/lib/python2.7/site-packages/site.py already exists. You may need to delete it.
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To force the link and overwrite all other conflicting files, do:
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brew link --overwrite formula_name
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To list all files that would be deleted:
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brew link --overwrite --dry-run formula_name
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```
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To list all files that would be deleted:
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brew link --overwrite --dry-run formula_name
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Don't follow the advice here but fix by using
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`Language::Python.setup_install_args` in the formula as described in
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[Python for Formula Authors](Python-for-Formula-Authors.md).
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### Upgrading macOS
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## Upgrading macOS
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Upgrading macOS can cause errors like the following:
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- `dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.54.dylib`
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- `configure: error: Cannot find libz`
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Following a macOS upgrade it may be necessary to reinstall the Xcode Command Line Tools and `brew upgrade` all installed formula:
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Following a macOS upgrade it may be necessary to reinstall the Xcode Command Line Tools and then `brew upgrade` all installed formulae:
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```sh
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xcode-select --install
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brew upgrade
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```
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### Other local issues
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## Other local issues
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If your Homebrew installation gets messed up (and fixing the issues found by `brew doctor` doesn't solve the problem), reinstalling Homebrew may help to reset to a normal state. To easily reinstall Homebrew, use [Homebrew Bundle](https://github.com/Homebrew/homebrew-bundle) to automatically restore your installed formulae and casks. To do so, run `brew bundle dump`, [uninstall](https://docs.brew.sh/FAQ#how-do-i-uninstall-homebrew), [reinstall](https://docs.brew.sh/Installation) and run `brew bundle install`.
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