How to turn off laptop display in linux ?

Today, one of my friends gave me this tip, so sharing with my friends… To turn off laptop display you can execute below command  [root@node] sleep 1; xset dpms force off Above would turn off the laptop display so that you can save power and keep jobs running in the bg. Any key press or …

Read more

Validate hypervisor driver capabilities using virt-host-validate in fedora

libvirt-client package provides a binary called ‘virt-host-validate’. This tool validates that the host is configured in a suitable way to run libvirt hypervisor drivers. If invoked without any arguments it will check support for all hypervisor drivers it is aware of. Optionally it can be given a particular   hypervisor type (‘qemu’ or ‘lxc’) to restrict …

Read more

Linux command cheat sheet

Below Linux commands will be handy when you work on a Linux system. [pdf id=5408] Hope it helped, I am not sure how it landed to me though :).

Install 64 bit skype in fedora16

I will conclude the steps here: 1) Download 64 bit version of skype by below command #wget http://commondatastorage.googleapis.com/xenodecdn/skype-2.2.0.35-2.x86_64.rpm 2) From the downloaded directory, do #yum localinstall skype-2.2.0.35-2.x86_64.rpm Now, skype should be installed in your system, once it is installed , run #skype Stage is yours!!! Njoy…

ext4 partition size / free space discrepancies

Let me explain the issue first: I was not able to ‘save’ a file in my ‘home’ directory and it was complaining that, there is NO SPACE, So, I checked “df” output [root@humbles-lap home]# df -kh Filesystem                     Size  Used Avail Use% Mounted on rootfs                          50G   42G  5.6G  89% / devtmpfs                       3.9G     0  3.9G   0% /dev …

Read more

‘lscpu’ command to check ‘virtualization’ support of CPU/processor

Somebody was asking me, how to know whether the cpu support ‘virtualization’ or not.  Till now I was answering , ‘look at ‘svm or vmx’ flag in /proc/cpuinfo. For Intel, it should show ‘vmx’ and for AMD it should show ‘svm’. But recently I have noticed a command called ‘lscpu’ which will list the specifications …

Read more

Firefox not starting with error ” symbol lookup error: /usr/lib64/xulrunner/libxul.so: undefined symbol: PR_SetCurrentThreadName” in Fedora-16

Ah.. I did update my firefox last friday, but didnt reboot the system after that.  In my next reboot firefox failed to start and obviously I was angry 🙁 . It spins and die. As part of troubleshooting, tried to start “firefox” in safe mode: [hchiramm@unused firefox]$ firefox –safe-mode /usr/lib64/firefox/firefox: symbol lookup error: /usr/lib64/xulrunner/libxul.so: undefined …

Read more

Red Hat’s KVM Hypervisor Achieves Top Virtualization Performance Results with IBM

Red Hat is excited to announce today that the Kernel-based Virtual Machine (KVM) hypervisor, which is incorporated in both Red Hat Enterprise Linux and Red Hat Enterprise Virtualization, has again achieved top performance results. This latest performance mark was achieved on the IBM® System x3850 X5 host server with Qlogic® QLE 256x Host Bus Adapters, …

Read more

RHEV 3.1 is out with coooool features!!!!

Friends , I am happy to share this with u.. RHEV 3.1 is out with lots of good features !!!!! Improved scalability supporting virtual machines with up to 160 virtual CPUs and 2TB RAM Quotas, extending the existing self-service capabilities of Red Hat Enterprise Virtualization 3.0 to allow administrators to define resource quotas for individual …

Read more