Build XEN Guest OS using existing img file

First day at new office, i got project to build/add guest OS on our Colocation server in Singapore.
Truely, this is the first time i'm using Xen for virtualization.
Before we build/add Guest OS an existing img file, first check list of the guest os in Xen using command ;
# /usr/sbin/xm list
or
# virsh list
[root@cyberthug]#/usr/sbin/xm list
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 1582 4 r----- 1001.2
domU-SG10-ND034 5 511 1 -b---- 284.6
domU-SG10-ND035 6 511 1 -b---- 1191.8
domU-SG10-ND036 13 511 1 -b---- 285.8
domU-SG10-ND038 8 255 1 -b---- 249.1
domU-SG10-ND040 9 127 1 -b---- 393.3
domU-SG10-ND041 19 511 1 -b---- 180.1
[root@cyberthug]#
shown 6 Virtual OS in active.

To build new OS from existing img file, shutdown one of virtual OS at list above.
Then copy img and configuration file.

# cp /vm/domU-SG10-ND041.img /vm/domU-SG10-ND042.img
# cp /etc/xen/domU-SG10-ND041 /etc/xen/domU-SG10-ND042

after finished copy, now change the new file of configuration as see upper which is "domU-SG10-ND042".

# vi /etc/xen/domU-SG10-ND042
will see below :

name = "domU-SG10-ND041"  --> change to "domU-SG10-ND042"
maxmem = 256
memory = 256
vcpus = 1
bootloader = "/usr/bin/pygrub"
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
vfb = [  ]

disk=["tap:aio:/vm/domU-SG10-ND041.img,xvda,w"] --> change to ["tap:aio:/vm/domU-SG10-ND042.img,xvda,w"]

vif=["mac=00:16:3e:25:05:1c,bridge=xenbr0"]  --> change to vif= ["mac=00:16:3e:25:06:4c,bridge=xenbr0"] (for mac address you can input randomly)
after that save.

Now try to start the Guest OS using :
#/usr/sbin/xm create -c /etc/xen/domU-SG10-ND042
To check it work type command :
#/usr/sbin/xm list
will show below :
[root@cyberthug]#/usr/sbin/xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0     1582     4 r-----   1001.2
domU-SG10-ND034                      5      511     1 -b----    284.6
domU-SG10-ND035                      6      511     1 -b----   1191.8
domU-SG10-ND036                    13      511     1 -b----    285.8
domU-SG10-ND038                      8      255     1 -b----    249.1
domU-SG10-ND040                      9      127     1 -b----    393.3
domU-SG10-ND042                    19      511     1 -b----    0.1
[root@cyberthug]#

You will see ;
"domU-SG10-ND042 19 511 1 -b---- 0.1"
Now the new Guest OS has up.
Change the configuration of New Guest OS, such : IP Address, hostname, and etc.

Done.