bash – 找不到NGINX brew install命令

我做

$brew install nginx

得到：

==> 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 

我在?/ .bashrc文件中有这个：

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

当我运行nginx -v或sudo nginx -t我得到这个：

-bash: nginx: command not found

我没有正确安装nginx吗？