Skip to content
Bots!
Bots!
  • About
    • Myself
    • আমার দোয়া
  • Bookmarks
    • Bookmarks
    • My OCI Bookmarks
    • Useful Proxmox Commands & Links
    • Learning Nano
    • Useful Sites
    • Useful Virtualbox Command
    • Useful MySQL Command
    • Useful Linux Command
    • BTT-CAS
  • Resources
    • Webinar on Cloud Adoption for Project Managers
  • Photos
  • Videos
  • Downloads
Bots!

Category: Virtualization

Fix Proxmox (PVE) “can’t lock file ‘/var/lock/qemu-server/lock-xxx.conf’ – got timeout” (Proxmox can’t shutdown/stop virtual machine) (Proxmox kill/force stop virtual machine)

Rumi, August 14, 2020

The Issue When trying to “Stop” or “Shutdown” virtual machine from Proxmox (PVE) web gui, the “Cluster log” shows end task UPID:pve:xxxxxxxx:xxxxxxxx:xxxxxxx:qmstop:xxx:root@pam: can’t lock file ‘/var/lock/qemu-server/lock-xxx.conf’ -got timeout end task UPID:pve:xxxxxxxx:xxxxxxxx:xxxxxxx:qmreboot:xxx:root@pam: VM quit/powerdown failed The Fix We can manually delete the lock from following path /run/lock/qemu-server # The file will…

Continue Reading

Reclaim disk space from a sparse image file qcow2/ vmdk

Rumi, July 23, 2020July 23, 2020

Sparse disk image formats such as qcow2 only consume the physical disk space which they need. For example, if a guest is given a qcow2 image with a size of 100GB but has only written to 10GB then only 10GB of physical disk space will be used. There is some…

Continue Reading

Proxmox Cloud-Init OS template creation

Rumi, July 2, 2020

Introduction In this guide we will go over creating a Proxmox KVM Template from a Cloud Image. This same process will work for any Cloud-Init Openstack based image type you can find online. Having done a number of these for our Proxmox based VPS service I wanted to post up…

Continue Reading

Fixing Slow Windows VM boot on Proxmox KVM with balloon driver

Rumi, June 18, 2020

Download the Win-Virtio Driver and load it on VM CDRom Drive. Download can be found here: https://pve.proxmox.com/wiki/Windows_VirtIO_Drivers Now install the Virtio Balloon driver AND the Balloon service in the guest as follows: Open Device Manager and see if there is an unknown PCI device. If so, right click it and…

Continue Reading

How to Add Additional Physical NICs to XenServer

Rumi, March 13, 2020

From the XenServer Command Line Interface (CLI), issue the following command: xe pif-list Press Enter. Note: If you have more than one XenServer in the pool, you must issue the xe host-list command to list all the XenServer hosts and write down the Universally Unique Identifier (UUID) of the host that you added…

Continue Reading

Setup Xen Orchestra (XO) Community Edition

Rumi, March 6, 2020

XCP-NG + Xen Orchestra Community Edition = a powerful 100% free virtualization environment and backup solution. I’m writing this to provide hand holding for those interested in XCP-NG but intimidated by the required command line setup to get Xen Orchestra Community Edition (XOCE) working. The installation and update scripts for…

Continue Reading

Change cluster node IP in Proxmox

Rumi, March 4, 2020

To update the present cluster host proxmox following files need to be updated: /etc/network/interfaces /etc/hosts /etc/pve/corosync.conf (only on one node necessary) However, corosync.conf needs special way to edit the file! Edit corosync.conf Editing the corosync.conf file is not always very straightforward. There are two on each cluster node, one in…

Continue Reading

Clone KVM-based Virtual Machines on Redhat / CentOS Linux

Rumi, February 24, 2020

Prerequisite: Operating System and Software Versions Operating System: – Redhat 7.3 Software: – libvirtd (libvirt) 2.0.0 Obtain Source Virtual Machine’s information Before we begin cloning any virtual machine we first need to obtain some basic information about it. The absolute minimum information required about the source virtual machine we are…

Continue Reading

Reinstall VirtualBox on Ubuntu & CentOS

Rumi, January 8, 2020

For Ubuntu To remove virtualbox sudo dpkg –list virtualbox-* sudo apt autoremove –purge virtualbox* dpkg -l virtualbox* | grep ^i Remove all PPAs from sources.list and source.list.d directory mkdir ~/apt-tmp sudo mv /etc/apt/sources.list.d/* ~/apt-tmp Make sure there is nothing except official repositories sources in /etc/sources.list. And update your sources: sudo apt…

Continue Reading

Install Qemu Guest Agent on Proxmox

Rumi, December 21, 2019

The qemu-guest-agent is a helper daemon, which is installed in the guest. It is used to exchange information between the host and guest, and to execute command in the guest. In Proxmox VE, the qemu-guest-agent is used for mainly two things: To properly shutdown the guest, instead of relying on…

Continue Reading
  • Previous
  • 1
  • …
  • 4
  • 5
  • 6
  • …
  • 9
  • Next

Myself…

Hi, I am Hasan T. Emdad Rumi, an IT Project Manager & Consultant, Virtualization & Cloud Savvyfrom Dhaka, Bangladesh. I have prior experience in managing numerous local and international projects in the area of Telco VAS & NMC, National Data Center & PKI Naitonal Root and CA Infrastructure. Also engaged with several Offshore Software Development Team.

Worked with Orascom Telecom-Banglalink, Network Elites as VAS partner, BTRC, BTT (Turkey) , Mango Teleservices Limited and Access to Informaiton (A2I-UNDP)

Currently working at Oracle Corporation as Principal Technology Solution and Cloud Architect.

You can reach me [h.t.emdad at gmail.com] and I will be delighted to exchange my views.

Tags

Apache Bind Cacti CentOS CentOS 6 CentOS 7 Debain Debian Debian 10 Debian 11 Debian 12 DKIM Docker endian icinga iptables Jitsi LAMP Letsencrypt Linux Munin MySQL Nagios Nextcloud NFS nginx pfsense php Postfix powerdns Proxmox RDP SSH SSL Ubuntu Ubuntu 16 Ubuntu 18 Ubuntu 20 Varnish virtualbox vpn Webmin Windows 10 XCP-NG zimbra

Topics

Recent Posts

  • MinIO with Let’s Encrypt SSL on Debian 12 – Step-by-Step Configuration August 1, 2025
  • How to Set Windows File Associations to Open .JNLP Files July 28, 2025
  • Removing CEPH from Proxmox Cluster July 23, 2025
  • Install Jitsi on Ubuntu 22.04 / 22.10 April 30, 2025
  • Key Lessons in life April 26, 2025
  • Create Proxmox Backup Server (PBS) on Debian 12 April 19, 2025
  • Add Physical Drive in Proxmox VM Guest April 19, 2025
  • Mount a drive permanently with fstab in Linux April 16, 2025
  • Proxmox 1:1 NAT routing March 30, 2025
  • Installation steps of WSL – Windows Subsystem for Linux March 8, 2025

Archives

Top Posts & Pages

  • MinIO with Let's Encrypt SSL on Debian 12 - Step-by-Step Configuration
©2025 Bots! | WordPress Theme by SuperbThemes