tensorboard错误 ：TensorBoard attempted to bind to port 6006, but it was already in use

训练tensorflow运行 tensorboard出错

命令：

$ tensorboard --logdir /home/class/tensorboard_log

错误：
ERROR:tensorflow:TensorBoard attempted to bind to port 6006, but it was already in use

解决方案：

输入命令：

$ lsof -i:6006

结果：
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
tensorboa 25243 user 3u IPv6 124016769 0t0 TCP *:x11-6
说明PID25243占用了6006端口，kill掉即可

输入命令：

$ kill -9 25243

再次运行：

$ tensorboard --logdir /home/class/tensorboard_log

输出TensorBoard 1.11.0 at http://master:6006 (Press CTRL+C to quit)就成功了