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What is the use of /etc/udev/rules.d/70-persistent-net.rules file in Rhel/Centos?

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what is the use of /etc/udev/rules.d/70-persistent-net.rules file in linux? is anyother way to change interface name in linux other than 70-persistent-net.rules? This file associates your NIC’s MAC address with an interface name that will be given to the NIC at startup. There are certainly ways to change the name at runtime but if you reboot, … Read more

Check services on CentOS 7

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Check services that are enabled on CentOS 7 Or for a specific service Disabling a service on boot in CentOS 7 To disable, it’s simply a matter of running systemctl disable on the desired service. Check which services failed to start on boot on CentOS 7 As a bonus, systemctl allows you to list all … Read more

Install Zabbix agent on CentOS

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Link to install zabbix server on centOS 6- http://www.unixmen.com/install-zabbix-monitoring-tool-centos-6-5/ Zabbix Documentation – https://www.zabbix.com/documentation/3.4/manual/installation/install_from_packages/rhel_centos Install on CentOS 7 – http://www.unixmen.com/how-to-install-zabbix-server-on-centos-7/ Install Epel Configure the ZabbixZone package repository and GPG key using command: Install the agent Modify Zabbix Agent Configuration Open zabbix_agentd.conf and make below necessary changes (Add your Zabbix Server IP and add Zabbix Agent hostname) and … Read more

Neighbor table overflow Error in Linux

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The ‘neighbor table overflow’ is a VERY common linux issue on large networks. Some network trigger this with default linux settings (because the previous network regime put so many IP address subnets on a single vlan , it creates large ARP tables – which is not normal / default settings). It is not an indication … Read more