Linux

How to Build 18c RAC – 1 of 4 – Preparing Two Database Servers

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Network Design for RAC Let’s see the network design of our cluster database. [root@primary01 ~]# vi /etc/hosts # Public 192.168.10.11 primary01 primary01.example.com 192.168.10.12 primary02 primary02.example.com # Private 192.168.24.11 primary01-priv primary01-priv.example.com 192.168.24.12 primary02-priv primary02-priv.example.com # VIP 192.168.10.111 primary01-vip primary01-vip.example.com 192.168.10.112 primary02-vip primary02-vip.example.com # SCAN # 192.168.10.81 primary-cluster-scan primary-cluster-scan.example.com # 192.168.10.82 primary-cluster-scan primary-cluster-scan.example.com # 192.168.10.83 primary-cluster-scan primary-cluster-scan.example.com […]
Linux

How To Bind Multiple IP Addresses to One Network Interface on Enterprise Linux 7

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Here are the steps that you can add more IP address into the network card.Copy the configuration file of eth0 as eth0:0[root@test ~]# cp -p /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0Modify the configuration[root@test ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0:0…DEVICE=eth0:0…IPADDR=192.168.0.111…Take the network effective.[root@test ~]# systemctl restart networkVerify the result[root@test ~]# ip a s eth02: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen […]
Linux

How to Know UUID of a Network Interface Card

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In some cases, you might want to know UUID of NICs, here is the command to see the information on Enterprise Linux 7.[root@test ~]# nmcli cNAME  UUID                                  TYPE            DEVICEeth0  7d412d6c-d2b4-4561-b5f5-7260b23bb3b5  802-3-ethernet  eth0eth2  3a73717e-65ab-93e8-b518-24f5af32dc0d  802-3-ethernet […]
Linux

How to Configure the Second NIC on Enterprise Linux 7 – by Modifying Configuration File

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After you added the second network interface card (NIC) on Enterprise Linux 7, the server can detect the presence of the NIC, but they are not functional until you configure them successfully, either by your bare hands or by nmtui command.[root@test ~]# ll /sys/class/net/total 0lrwxrwxrwx. 1 root root 0 Jul  4 02:28 eno33554992 -> ../../devices/pci0000:00/0000:00:11.0/0000:02:06.0/net/eno33554992lrwxrwxrwx. 1 […]