ISCSI Target Setup

This is about how to setup an iscsitarget based on hlinux.In order to use this iscsitarget, first part is start up iscsi service, like install some components and let linux run this service ,second part is add a new volume to iscsitarget and expose to client then.

SSH usage

Allow ssh login between machines without passwd, each client will create a private key and public key and send public key to target manchine, then it will access without password.

NBD usuage

This article is about how to use NBD(network block device) in a virtualization enviroment, we setup a nbd server and use their disk files to provide block devices for other clients. Also we could use remote nbd by kvm support instead of nbd client. 

VNC remote access Libvirt vm

When I try using vncviewer to remote access a libvirt virtual machine, it shows error:

VNC Viewer Free Edition 4.1.1 for X - built Apr  2 2015 21:51:06
Copyright (C) 2002-2005 RealVNC Ltd.
See http://www.realvnc.com for information on VNC.

Wed Dec 16 11:24:12 2015
 main:        unable to connect to host: Connection refused (111)

When You “Have an IP” but the Network Still Doesn’t Work: A DHCP/IP-Conflict Fix

I had a wierd situation recently, could get the ip address, set up apt.conf and proxy correctly, but could not connect network, could ping a inner desttop, then my friend found that it responses twice when ping this ip, so it probably is that the ip is used by other people stactly, so I need to get a new automatic ip address, here is what I did,