cp -rf /usr/local/bin/ /tmp/
mount -t tmpfs tmpfs /usr/local/bin(-o size=8m{可以申請大小} mount完這個bin目錄就會消失)
cp -rf /tmp/bin/* /usr/local/bin
cp -rf /usr/local/bin/ /tmp/
mount -t tmpfs tmpfs /usr/local/bin(-o size=8m{可以申請大小} mount完這個bin目錄就會消失)
cp -rf /tmp/bin/* /usr/local/bin
## spring security https://github.com/jitwxs/blog-sample/tree/master
https://blog.csdn.net/zhuizhufanxin123/article/details/103982940