How to install Linux from USB

Posted on October 14, 2013 by Gkhan

I don’t have DVD Drive on my new Desktop I was worried how i will install OS on my Desktop. I got a good utility ISO2USB . its converting bootable ISO image to bootable USB and i was able to boot from USB and install OS on my Desktop

ISO2USB download link

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How to configure Nymgo SIP Trunk for Elastix PBX or Asterisk PBX

Posted on October 11, 2013 by Gkhan

I was trying to configure SIP Trunk on my Elastix PBX  I followed the various forums got configured today. I am sharing my experience .

1-On General Setting  below are the configuration.GeneralSettings

 

 

 

 

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How to add remove enable disable services on start up in Cent OS

Posted on October 9, 2013 by Gkhan

To manage services in Cent OS in Text User Interface (TUI)
# ntsysv
if you do not have “ntsysv” command  # yum install ntsysv
its shows TUI  interface to enable and disable the services in CentOS.
from CLI we use chkconfig  Continue reading →

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The VMRC console has disconnected attempting to reconnect

Posted on October 6, 2013 by Gkhan

I got bellow error from Vsphere client  while accessing console.

vmrc

I just logged in from another PC it is working fine  . There were no error as above.             Re install the Vsphere client and try.

 

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Commonly used Linux important Commands

Posted on October 3, 2013 by Gkhan

Commonly  used Linux important Commands

get list of all installed software

rpm -qa | less

Use following syntax to list the files for already INSTALLED package:

rpm -ql package-name for example :- rpm -ql package

rpm -ql package-name

Continue reading →

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Unable to install Webmin

Posted on September 30, 2013 by Gkhan

Unable to install Webmin

If you are getting below error message while installing webmin
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 11f63c51
Public key for webmin-1.570-1.noarch.rpm is not installed

You need to download the key and install it
wget http://www.webmin.com/jcameron-key.asc
rpm –import jcameron-key.asc

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How to create Cisco UCS Server Service Profiles

Posted on September 19, 2013 by Gkhan

If you have small Cisco UCS Setup as one chassis with full of Blades then its easy to create Servers Service profiles manually on Expert mode. download and fill the below excel file according to your requirement as per your company policy. Then start creating profile.

Continue reading →

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How to update Firmware on Cisco UCS Blades and UCS manager 2.0 to 2.1

Posted on September 18, 2013 by Gkhan

I have update the Firmware of Cisco UCS B Series Blades and UCS Manager .

I followed the steps from Cisco Guide . I went through the manual update from Page No 16 after downloading the Firmware . Continue reading →

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Unable to find network card in CentOS 6

Posted on September 12, 2013 by Gkhan

Some time we are unable to find network information on ifcfg command or network connection does not work after cloning.

To see all interfaces   ifcfg -a

To force CentOS 6 to re-detect network interfaces

Delete the MAC Address from ifcfg-eth0 file Continue reading →

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How to check disk uses on Linux

Posted on September 12, 2013 by Gkhan

How to check disk uses on Linux

df command : Report file system disk space usage

du command : Estimate file space usage

Example :- Continue reading →

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