http://www.openvim.com/tutorial.html
Free & Public DNS Server List (Updated March 2014) By Tim Fisher Updated October 01, 2016. Your ISP automatically assigns DNS servers when your router or computer connects to the Internet via DHCP... but you don't have to use those. Below are free DNS servers you can use instead of the ones assigned, the best and most reliable of which, from the likes of Google and OpenDNS, you can find below: See How Do I Change DNS Servers? for help.
Хитрости с битовыми операциями / Типичный программист Нашли и оформили подборку различных хитрых приёмов с битовыми операциями. С основами битовых операций также можно ознакомиться в нашей статье. Если вы знаете какие-то трюки, которые не вошли в этот список, делитесь ими в комментариях! Целые числа Установка n-ого бита Обнуление n-ого бита Chapter 12. Storage pools Suppose a storage administrator responsible for an NFS server creates a share to store guest virtual machines' data. The system administrator defines a pool on the host physical machine with the details of the share (nfs.example.com:/path/to/share should be mounted on /vm_data). When the pool is started, libvirt mounts the share on the specified directory, just as if the system administrator logged in and executed mount nfs.example.com:/path/to/share /vmdata. If the pool is configured to autostart, libvirt ensures that the NFS share is mounted on the directory specified when libvirt is started. Once the pool starts, the files that the NFS share, are reported as volumes, and the storage volumes' paths are then queried using the libvirt APIs. The volumes' paths can then be copied into the section of a guest virtual machine's XML definition file describing the source storage for the guest virtual machine's block devices.
Blog » An installation and everyday usage guide for libvirt and KVM Why all this ? Today, nearly every modern computing-related company uses directly or indirectly a virtualization software. As seen with the recent Cloud computing trend, it is a sector that recently exploded in popularity and it is now accessible to everyone. There are now a LOT of alternatives to virtualize an OS :
Adding iSCSI storage to KVM I’m really surprised that I’m the one writing this as there we no flat out simple guides available, maybe it’s just because I’m new to the whole iSCSI thing. Awhile back when I first was testing multiple storage types with KVM, I never got my head around iSCSI when I had an OpenFiler VM up. It’s actually quite simple. From the Virtual Manager window, go ahead and click Edit and Host Details, once there go to the Storage tab. Click the plus sign to add storage. Glances gives a quick overview of system usage on Linux Monitor your Linux system As a Linux sysadmin it feels great power when monitoring system resources like cpu, memory on the commandline. To peek inside the system is a good habit here atleast, because that's one way of driving your Linux system safe. Plenty of tools like Htop, Nmon, Collectl, top and iotop etc help you accomplish the task.
Check hardware information on Linux with hwinfo command Hwinfo The hwinfo command is a very handy command line tool that can be used to probe for details about hardware components. It reports information about most hardware units like cpu, hdd controllers, usb controllers, network card, graphics cards, multimedia, printers etc. Hwinfo depends on the libhd library to gather hardware information which depends on libhal. Hwinfo is available in the repositories of Ubuntu and Debian. Encrypt DNS Traffic In Linux With DNSCrypt (Via OpenDNS) DNSCrypt, as its name suggests, encrypts DNS traffic between your computer and OpenDNS, in the same way SSL turns HTTP traffic into HTTPS encrypted traffic. Initially, DNSCrypt was announced as being available for Mac only for now, but according to an OpenDNS article posted yesterday, the source code for DNSCrypt was published on GitHub when they've released the Mac preview and even though there's no user interface yet, Linux users can already install DNSCrypt. Why use DNSCrypt? DNSCrypt encrypts all DNS traffic between your computer and the OpenDNS servers (so you'll be using OpenDNS) and can protect you from man-in-the-middle attacks, spying, resolver impersonation, can prevent Internet service providers from blocking various websites and more. This is the first tool that encrypts DNS traffic - for instance, TOR encrypts DNS requests, but they are decrypted at the exit node.
Top 20 Nginx WebServer Best Security Practices Nginx is a lightweight, high performance web server/reverse proxy and e-mail (IMAP/POP3) proxy. It runs on UNIX, GNU/Linux, BSD variants, Mac OS X, Solaris, and Microsoft Windows. According to Netcraft, 6% of all domains on the Internet use nginx webserver. Nginx is one of a handful of servers written to address the C10K problem. Unlike traditional servers, Nginx doesn't rely on threads to handle requests. Instead it uses a much more scalable event-driven (asynchronous) architecture.