How to find WWN Name of a QLogic Card on CentOS 7

CentOS 7 community provides a utility systool to work with hardware adapters. The utility comes with sysfsutils package and this package by default not installed on  CentOS 7 systems. 

How to resolve “-bash: systool: command not found” on CentOS 7

CentOS 7 community provides a utility systool to work with hardware adapters. The utility comes with sysfsutils package and this package by default not installed on  CentOS 7 systems.

How to Maintain Specific Number of Kernel Packages on CentOS 7

Sometime due to less space on /boot partition need remove old kernel packages once new/updated kernel installed. The “installonly_limit” option in /etc/yum.conf is used to maintain the number of kernel available. By default the limit is set to 3 kernels in CentOS 7. 

How to Install GlusterFS on CentOS 7

GlusterFS packages are not included in the default CentOS 7 repository so the packages can be installed from Gluster repository and EPEL repository. GlusterFS packages needs to install on all the GlusterFS Nodes.