(Disclaimer: I am by no means an expert with XenServer. So please don’t take anything you read here for granted. It’s my own experience and what I found in documentation and online.) Switching a XenServer Linux VM from hardware assisted virtualization to paravirtualization nowadays is quite simple, since most Linux distributions already come with a … Continue reading Switching a XenServer VM from HVM to PVM
Category: Linux
Clone a Linux system without imaging it
When I want to clone a Linux system (or the boot partition/drive of any operating system), I usually use Clonezilla and make a image of the boot disk or boot partition. Unfortunately those image files can become quite large and it is a pain in the lower back to restore them on a smaller hard … Continue reading Clone a Linux system without imaging it
Installing Webmin on Ubuntu 16.04 LTS (Xenial Xerus)
The instructions how to install Webmin on Debian (and thereby also Ubuntu) seem a bit outdated because edits to the file /etc/apt/sources.list should be replaced by adding a file to the directory /etc/apt/sources.list.d/. So, instead of adding deb https://download.webmin.com/download/repository sarge contrib to the file /etc/apt/sources.list create a new file /etc/apt/sources.list.d/webmin.list with that content and possibly … Continue reading Installing Webmin on Ubuntu 16.04 LTS (Xenial Xerus)
Switching a XenServer VM from PVM back to HVM
(Disclaimer: I am by no means an expert with XenServer. So please don’t take anything you read here for granted. It’s my own experience and what I found in documentation and online.) If switching a XenServer Linux VM to paravirtualization fails, you usually end up with a non booting VM which is quite annoying. Switching … Continue reading Switching a XenServer VM from PVM back to HVM
How to shrink a Windows VM in XenServer
Apparently shrinking a Windows VM (actually any kind of VM) cannot be done with XenServer and XenCenter. You need to create an image of the original volume to a smaller virtual disk in order to do that. On top of that, the tool that used to work fine for this, Citrix XenConvert, has been deprecated … Continue reading How to shrink a Windows VM in XenServer
Deleting a XenServer Storage Repository
(Disclaimer: I am by no means an expert with XenServer. So please don’t take anything you read here for granted. It’s my own experience and what I found in documentation and online.) In my previous post, I described how to add a Storage Repository to a XenServer using the xe command line tool. Now, since … Continue reading Deleting a XenServer Storage Repository
Installing XenServer updates via XenCenter fails
(Disclaimer: I am by no means an expert with XenServer. So please don't take anything you read here for granted. It's my own experience and what I found in documentation and online.) There is at least one reason why installing updates for XenServer via XenCenter may fail (with unhelpful error messages of course): You haven't … Continue reading Installing XenServer updates via XenCenter fails
new Seagate Barracuda drives are very slow
Seagate has changed their Barracuda desktop 3,5" 2 and 4 TB drives from using 3 platters to using only 2 while doubling the cache RAM from 128 to 256 MBs. We have been buying this type of drives for various usages, one of them is the 4 TB drive for the backup of our main … Continue reading new Seagate Barracuda drives are very slow
Find all subdirectories containing xml files on Linux command line
So I don't forget: The following Linux command shows a list of all subdirectories that contain a least one *.xml file: find . -type f -name '*.xml' | sed -r 's|/[^/]+$||' | sort | uniq This finds all xml files where the extension is all lower case. But since many Windows programs upper case it … Continue reading Find all subdirectories containing xml files on Linux command line
Rebooting a Linux server unattended
Just so I can look it up when I need it again: /sbin/shutdown -r now is the command that when run as root will reboot a Linux server. It can simply be added as a scheduled command in WebMin: