run a couple of OpenBSD and FreeBSD guest/virtual machines under KVM. My server has 32GB ram and 4C/8T Intel Xeon CPU. Everything was working fine until recent CentOS Linux 7 kernel update. After a fresh reboot of my CentOS 7 Linux box OpenBSD and FreeBSD machine become very slow and after 24 hours stop responding to the network request. How can I solve significant performance problems with BSD family of oses running on CentOS 7 KVM?
have installed and setup KVM server on an Ubuntu Linux. I downloaded various .qcow2 cloud images. How do I setup public ssh keys for downloaded CentOS/FreeBSD/Ubuntu cloud images using virt-sysprep? Continue reading “How to add ssh key to qcow2 Linux cloud images using virt-sysprep”
am a new Linux and KVM user. How do I delete a VM guest with virsh command line on Linux operating system? How do I delete a virtual machine called vps42 on Ubuntu or CentOS Linux server?
I‘m new to Linux and my boss told me to remove ssh server as we don’t need to provide the remote login and file transfer capabilities of SSH. How do I disable and remove OpenSSH server?
How do I enable console redirection under OpenBSD so that I can see my remote server boot information and any diagnostic information that is normally printed to the screen? I’ve already enabled serial ports in my server BIOS and wired them up. How do I configure and access OpenBSD UNIX x86/amd64 server over serial console?
Now, you have installed the KVM software and required drivers on the host operating systems. You also configured bridged based networking which will provide direct access to the Internet. It is time to create your first guest operating systems. For demonstration purpose you will install CentOS Linux v5.5 using the Internet using virt-manager GUI tool.
Q. I’ve Debian Linux server and whenever someone trying to ssh into this box, they get an error as follows and server closes the connection:
System bootup in progress -please wait
How do I fix this problem and allow ssh login?