![]() "NETMASK" refers to the subnet mask of the network."IPADDR" refers to the IP address of the network card."BOOTPROTO=static" means that the network card uses a static IP.Open the configuration file and edit the following variables Enter the /etc/sysconfig/network-scripts directory and find the configuration file (ifcfg-enp0s5) of the network card.Run the following command to check the network and interface managed by the network manager: nmcli dev statusĪt this point, it means that the network card name of the current server node is enpOs5Įnsure that the network card enp0s5 is not assigned an IP address 4.Use the following command to verify the status of the network manager service: systemctl status NetworkManager By default, CentOS/RHEL 7 has a network manager installed and enabled. Network Manager (Network Manager) is a dynamic network controller and configuration system, which is used to keep devices and connections open and activated when network devices are available.View the Hadoop status through the web interfaceģ servers, CentOS 7 system installed in Minimal modeĮxecute separately on the three servers: 1. Download the Hadoop installation file and upload it to the master server Set environment variables (execute separately on three servers) Install JDK1.8 (execute separately on three servers) Copy the authorized_ keys file to the slave server Check the authorized_ keys file generated by the merge Use the following command to verify the status of the network manager service:
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