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场景CMake 3.19.1编译OpenCV 4.4版本源码，提示出错Could NOT find OpenJPEG (minimal suitable version: 2.0, recommended version >= 2.3.1)

景CentOS7.6启动RabbitMQ，登陆WEB网页，提示Config file /opt/rabbitmq_server-3.6.10/etc/rabbitmq/rabbitmq.config (not found)解决在windows平台找到安装目录，拷贝配置文件到对应的目录：cd /opt/rabbitmq.config.example /opt/rabbitmq_server-3.6.10/etc/rabbitmq/rabbitmq.config...

前言系统版本：CentOS Linux release 7.7.1908 (Core)通过rabbitmqctl add_user admin 12345指令，给rabbitmq添加用户提示出错：[root@localhost perl]# rabbitmqctl add_user admin 12345Error: unable to connect to node rabbit@localhost: nodedownDIAGNOSTICS=======...

问题ERROR: node with name "rabbit" already running on "localhost"[root@localhost init.d]# rabbitmqctl stopStopping and halting node rabbit@localhostError: unable to connect to node rabbit@localhost: nodedownERROR: node with name "rabbit" alre...

言系统环境：CentOS Linux release 7.7.1908 (Core)要求将RabbitMQ注册成开机服务程序创建软连接 ln -s/opt/rabbitmq_server-3.6.10/sbin/rabbitmq-server /etc/init.d/rabbitmq-server创建软连接 ln -s/opt/rabbitmq_server-3.6.10/sbin/rabbitmq-env /etc/init.d/rabbitmq...

场景 [root@taishan-atlas init.d]# service rabbitmq-server startFailed to get D-Bus connection: Operation not permittedERROR: epmd error for host taishan-atlas: address (cannot connect to host/port)解决方案修改/etc/hosts，添加127.0.0.1 t...