Fedora Linux HowTo - Linux / Unix Q & A from nixCraft

How to find out AES-NI (Advanced Encryption) Enabled on Linux System

December 11, 2015December 1, 2016in CentOS, Debian / Ubuntu, Linux, RedHat and Friends, Suse last updated December 1, 2016

The Intel Advanced Encryption Standard (AES) or New Instructions (AES-NI) engine enables extremely fast hardware encryption and decryption for openssl, ssh, vpn, Linux/Unix/OSX full disk encryption and more. How do I check support for Intel or AMD AES-NI is loaded in my running Linux in my Linux based system including openssl?

How to summarize detailed system resource usage for given command on a Linux or Unix

December 8, 2015December 8, 2015in CentOS, Debian / Ubuntu, FreeBSD, Linux, Mac OS X, Troubleshooting, UNIX last updated December 8, 2015

How do I determine the system resource usage during of execution of a particular command on a Linux, OS X Unix, BSD and Unix-like operating system?

HowTo: Prevent Yum From Upgrading The Kernel On a CentOS / Red Hat Enterprise Linux

February 19, 2014February 19, 2014in CentOS, Package Management, RedHat and Friends last updated February 19, 2014

I am a new RHEL / Centos Linux server admin. I would like yum to update all packages except the Linux Kernel. How can I prevent yum command from updating kernel on a CentOS/RHEL/Fedora Linux based systems?

CentOS / RHEL: Install iftop To Display Bandwidth Usage Per interface By Host

November 11, 2013November 11, 2013in CentOS, Monitoring, Networking, RedHat and Friends last updated November 11, 2013

I am running Red Hat Enterprise Linux on IBM based system. How do I display bandwidth usage on an interface by host in real time using command line option? How do I monitor bandwidth usage in a real time on RHEL or CentOS Linux based server? How can I install iftop utility on CentOS or RHEL server using the yum command?