fix a vncserver issue on Scientific Linux 6.1

I tried to connect a vncserver from a Windows 7 machine to a SL 6.1 server. But it gave following error:

Failed To Connect: Connection Refused (10061)

After checked lots of things, I finally found that following command caused the problem:

sudo service vncserver start

(btw: I was logined in as a normal user, not root.)

The output of this command looks good, but you will never connect the vnc server.

The correct commands is to start vncserver as the login user, just type:

vncserver

Linux SATA names

http://utcc.utoronto.ca/~cks/space/blog/linux/LinuxSATANames

pass QEMU monitor commands to virsh

Virsh supports qemu-monitor-command to pass any QEMU monitor commands. Following is an example:

virsh # qemu-monitor-command 45 --hmp info cpus

* CPU #0: pc=0xffffffff8144d27a thread_id=19994

"45" is the domainID
"--hmp" tells the virsh to use human readable mode
"info cpus" are QEMU monitor commands, you can use any supported by QEMU.