找不到 NGINX brew 安装命令

I do

$ brew install nginx

and get:

==> Downloading http://nginx.org/download/nginx-1.2.2.tar.gz
Already downloaded: /Library/Caches/Homebrew/nginx-1.2.2.tar.gz
==> Patching
patching file conf/nginx.conf
==> ./configure --prefix=/usr/local/Cellar/nginx/1.2.2 --with-http_ssl_module --with-pcre         --with-ipv6 --with-cc-opt=-I/usr/local/include --with-ld-opt=-L/usr/local/lib --conf
==> make
==> make install
==> Caveats
In the interest of allowing you to run `nginx` without `sudo`, the default
port is set to localhost:8080.

If you want to host pages on your local machine to the public, you should 
change that to localhost:80, and run `sudo nginx`. You'll need to turn off
any other web servers running port 80, of course.

You can start nginx automatically on login running as your user with:
mkdir -p ~/Library/LaunchAgents
cp /usr/local/Cellar/nginx/1.2.2/homebrew.mxcl.nginx.plist ~/Library/LaunchAgents/
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.nginx.plist

Though note that if running as your user, the launch agent will fail if you
try to use a port below 1024 (such as http's default of 80.)
Warning: /usr/local/sbin is not in your PATH
You can amend this by altering your ~/.bashrc file 

我的 ~/.bashrc 文件中有这个：

 export PATH=$PATH:/usr/local/sbin

当我运行 nginx -v 或 sudo nginx -t 时，我得到以下信息：

-bash: nginx: command not found

我没有正确安装nginx吗？

运行echo $PATH，是否出现/usr/local/sbin？ 如果不： 尝试获取 ~/.bashrc 文件并查看它是否出现： source ~/.bashrc

再次运行 echo $PATH。它应该出现。