yarn 报错 Something is already running on port 3000. Probably:
yarn start 后，没有 CTRL+C 结束进程，而直接关掉终端导致进程无法关闭时，再次 start 会报出端口占用的错误：Something is already running on port 3000. Probably:
node .../start.js(pid 00000)
in ...
Would you like to run the app on another p...
docker run ipv4报错
docker run 时报错WARNING: IPv4 forwarding is disabled. Networking will not work.的解决办法：$ vim /etc/sysctl.conf添加net.ipv4.ip_forward=1，保存退出，重启 network 服务：$ systemctl restart network运行命令$ sysctl net.ipv4....