How to find Number of Physical/Logical CPUs, cores and memory in Solaris

Sometimes it becomes a bit tricky to gather CPU and memory information, especially with t-series hardware with LDOMs installed on it. The article takes an example of T5240 server to gather hardware information like physical/logical CPUs and memory. T5240 that I use, have the following specs : CPU type Physical CPUs Virtual/logical CPUs (threads) Memory […]

How to dynamically replace CPU/memory board (dynamic reconfiguration) on SunFire s6800/e12K/e15K/e25K

Whats a dynamic reconfiguration? On s6800/e12K/e15K/e25K systems we may dynamically reconfigure CPU/memory boards, I/O boards and PCI on I/O boards with dynamic reconfiguration. The process is on-line and there is no interruption in the OS during this reconfiguration. This is useful when you want to replace a faulty system board on the system or configuring […]

CentOS / Redhat : How to set SELinux Modes

SELinux modes SELinux gives that extra layer of security to the resources in the system. It provides the MAC (mandatory access control) as contrary to the DAC (Discretionary access control). Before we dive into setting the SELinux modes, let us see what are the different SELinux modes of operation and how do they work. SELinux […]