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Old 09-30-2008, 10:36 AM   #1
Registered: Nov 2006
Posts: 55

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Xen on CentOS 5.0 "xm"

I am completely new to CentOS 5.0, (only a few days). Someone was asking me about installing Citrix XenServer on it (I don't know anything about "XenServer", I just heard about it yesterday). While searching around for info I found that CentOS 5.0 already has Xen installed on it.

Does anyone know the difference between Citrix XenServer and the Xen installed on CentOS 5.0.?

I was told if I use "uname -r" it will tell me if the Xen kernel is installed. I get:
uname -r

Which I assume means it's installed.

Now I was told t use "xm list" but "xm list" doesn't work. I get:
xm list
bash: xm: command not found

Next, to setup a virtual machine use "virt-install", this does work:
What is the name of your virtual machine?

Why doesn't "xm list" work.? What do I need to do to make it work.?
Old 10-01-2008, 12:55 AM   #2
Registered: Sep 2005
Location: Sri Lanka
Distribution: Fedora (workstations), CentOS (servers), Arch, Mint, Ubuntu, and a few more.
Posts: 441

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1. I don't know the exact difference. But I know that XenSource the company behind Xen was bought by Citrix. So I guess they have a different product. Since Xen is Open Source it's been included with several distros in cluding RHEL, CentOS, Fedora and Ubuntu.

2. Why xm command doesn't work: Check whether you have the necessary packages. For example just having a Xen kernel (kernel-xen) doesn't guaruntee the availability if xen utilities.
Find what's installed
# rpm -qa xen*
Search the repos for what are available.
#yum search xen
If xen, xen-libs or any other necessary package is not installed try installing them with
#yum install xen xen-libs
Note: You might some from here useful.

3. Try virt-manager. It's a GUI tool which can help you to manage Xen VMs. Also if your time allows ans need drives, have a look at the new oVirt project.

Last edited by SkyEye; 10-01-2008 at 12:58 AM.
Old 11-20-2009, 09:09 PM   #3
LQ Newbie
Registered: Nov 2009
Posts: 4

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yum install didn't help

Hi all,

I have installed the xen kernel (Dom0) on CentOS 5 and is verified by the following:

root# uname -r

I have also installed all the appropriate packages (xen xen-libs libvirt xen-kernel, etc) and I still get the following:

root# xm list
bash: xm: command not found

I can use the virt-manager GUI or virt-install from the terminal, but need to specifically use xm tools. I find it strange that after installing all the packages that they are not working.

Any suggestions?

Old 12-09-2009, 10:18 AM   #4
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Registered: Dec 2009
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"/usr/sbin/xm list" run this. I think, It will work, also, plase check your PATH env

Old 01-31-2010, 11:28 AM   #5
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Registered: Nov 2009
Posts: 4

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Still no luck... Can't seem to run any xm commands... Here's what I've tried...

[root@localhost usr]# xm list
bash: xm: command not found
[root@localhost usr]# xm create
bash: xm: command not found
[root@localhost usr]# yum install xen*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* addons:
* base:
* extras:
* updates:
Setting up Install Process
Package xen-devel-3.0.3-94.el5_4.3.i386 already installed and latest version
Package xen-libs-3.0.3-94.el5_4.3.i386 already installed and latest version
Package xen-3.0.3-94.el5_4.3.i386 already installed and latest version
Nothing to do
[root@localhost usr]#

Again, the Virtual Machine Manager GUI is working, but I would like to run VM management from the terminal.

Any help would be most appreciated. Thanks!
Old 02-01-2010, 07:36 AM   #6
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Registered: Dec 2009
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Please run the following command ("/usr/sbin/xm list")

[root@localhost usr]# /usr/sbin/xm list

Old 02-01-2010, 06:35 PM   #7
LQ Newbie
Registered: Nov 2009
Posts: 4

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Worked! Sorry about that. I was in the wrong directory before.



centos, rhel, virtmanager, xen, xm

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