There are several commands to determine the WWN of a Fibre Channel (FC) HBA and their status (online/offline). The post discusses few of the most commonly used methods. Method 1 To find the HBA cards installed on your system use : # lspci -nn | grep -i hba 07:00.0 Fibre Channel [0c04]: QLogic Corp. ISP2532-based […]
Archives for September 2015
CentOS / RHEL 6 : How to configure kdump
kdump is an advanced crash dumping mechanism. When enabled, the system is booted from the context of another kernel. This second kernel reserves a small amount of memory, and its only purpose is to capture the core dump image in case the system crashes. Since being able to analyze the core dump helps significantly to […]
CentOS / RHEL 7 : How to configure kdump
kdump is an advanced crash dumping mechanism. When enabled, the system is booted from the context of another kernel. This second kernel reserves a small amount of memory, and its only purpose is to capture the core dump image in case the system crashes. Since being able to analyze the core dump helps significantly to […]
How to change hostname in CentOS/RHEL 7
Unlike CentOS/RHEL 6, manually appending “HOSTNAME=xxxxx” into file /etc/sysconfig/network and restarting system will not work on CentOS/RHEL 7, in order to change/set the hostname. There 4 ways to change the hostname in CentOS/RHEL 7 : You can use either of following methods to change the hostname 1. use hostname control utility: hostnamectl 2. use NetworkManager […]