chatproject a chatproject C++ from lanqiaowang install sudo apt-get install build-essential libmysqlclient-dev libmysqlcppconn-dev run make Q&A bind: Address already in use sudo lsof -i :<端口号> # 查找占用端口的进程 sudo kill -9 # 关闭占用端口的进程 或等待一段时间后再尝试启动应用程序，可能会使端口空闲