PowerHA/HACMP Moving Resource Group (RG) one node to other

We are going to discuss about the resource group (RG) movement one node to other in PowerHA. Here are the steps 1) Extending PATH vairable with cluster paths Sometimes cluster paths are not included in default path ,run below command incase if you are not able to run commands directly. export PATH=$PATH:/usr/es/sbin/cluster:/usr/es/sbin/cluster/utilities:/usr/es/sbin/cluster/sbin:/usr/es/sbin/cluster/cspoc 2)...

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Editing the /etc/inittab File in Maintenance Mode

Problem(Abstract) This technote describes a technique for creating a minimal /etc/inittab file if no other tools are available. Symptom System hangs or crashes at boot time. Cause A bad entry in the /etc/inittab is keeping the system from booting properly. Resolving the problem Ordinarily if there is a problem with one or more entries in...

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How to enable the Name Service cache Daemon (NSCD)

Question How do you enable NSCD to improve the performance of the hostname, password, name and group lookup which is frequently being done by IBM Rational ClearCase? Cause By enabling the Name Service cache Daemon (NSCD) of the operating system, a significant performance improvement can be achieved when using naming services like DNS, NIS, NIS+,...

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Howto fix delay in SSH Login

Have you ever faced  login delays  when you tried to connect to the Linux systems, if yes this is happening due to  reverse DNS look-up  query that is been made to DNS Server. We can fix this issue as mentioned below steps: 1) Take /etc/ssh/sshd_config  backup # cp -p /etc/ssh/sshd_config /etc/ssh/sshd_config.`date '+%m-%d-%Y_%H:%M:%S'`...

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Install SNMP Service on RHEL or CentOS

Install SNMP Service on RHEL or CentOS In this article  we are going to learn  how to install and start  SNMP service in RHEL/CentOS. We need  to have  net-snmp rpm package installed on the servers , generally it would come with repository. 1....

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