Terminal Can'；t运行brew doctor，它会发出警告

我试图在终端上运行brew doctor，但当我运行时，它会告诉我一些警告。。。我粘贴它：

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
    /usr/local/lib/libjansson.4.dylib
    /usr/local/lib/libusb-1.0.0.dylib

Warning: Unbrewed .la files were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected .la files:
    /usr/local/lib/libjansson.la

Warning: Unbrewed static libraries were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected static libraries:
    /usr/local/lib/libjansson.a
    /usr/local/lib/libusb-1.0.a

Warning: You have unlinked kegs in your Cellar
Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
those kegs to fail to run properly once built. Run `brew link` on these:

    jansson
    libidn
    libtool
    libusb 

---

嗯，听起来好像您自己安装了libjansson和libusb工具，而没有使用brew

除此之外，按照它的说明，并运行以下命令

brew link jansson
brew link libidn
brew link libtool
brew link libusb

---

它可能会要求您添加

--overwrite

标志，您可以首先通过添加

--dry run

标志来检查将采取的操作。

检查此答案，它告诉您可以删除旧安装中的剩余文件

谢谢，但是当我运行命令时，命令告诉我/usr/local/ceral/libtool（或jansson等）/2.4.2/usr/local/opt是不可写的。您应该更改其权限。如何更改权限？PS我刚刚运行brew安装

sudo chmod go+rw/usr/local/opt

，我还建议您有时间时阅读手册页和自制wiki。谢谢！终于成功了！当然我会读维基；）