知识库｜湖南麓川信息科技有限公司

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# Ubuntu设置强密码

https://help.ubuntu.com/community/StrongPasswords

# Linux端口被占用

参考[StackOverflow](https://stackoverflow.com/questions/20239232/error-that-port-is-already-in-use)

执行命令`sudo lsof -t -i tcp:<port_number>`查看被占用的端口号对应的进程id，然后kill相应进程，或者直接执行`sudo lsof -t -i tcp:<port_number> | xargs kill -9`或`sudo fuser -k <port_number>/tcp`kill占用端口的进程。