How to Remotely Control Your PC (Even When it Crashes)

KVM (Keyboard Video Mouse)


Intel vPro is a management platform built into Intel processors and other hardware that allows companies to manage their desktops and laptops out-of-band (OOB). That means the computers can be managed no matter if the computer in on or off, and even if the operating system has failed or there is no hard drive present.

With Core processors Intel introduced Active Management Technology (AMT) 6.0 which introduced a slew of new features including Keyboard Video Mouse (KVM) Remote Control.

Intel AMT KVM runs at a hardware level which allows you to go remote with your computer in the case of a total system failure or even without an operating system installed.

Determine if Your Computer Supports Intel AMT KVM

Because vPro is designed for business use, not every Intel processor supports Intel AMT KVM. Specifically what you want to look for is a vPro logo somewhere on your computer.

Note: Only some Core i5 and i7 processors support vPro. Intel does not currently make an i3 processor with vPro.


How To Create A NAS Using ZFS and Proxmox (with pictures)

Seedbox Theory:
The lowest resource utilization (read: excellent performance) seedboxes use rTorrent 48 with the ruTorrent 38 web interface over FCGI 13 (e.g. PHP) on Apache 1 or nginx 2. Most mid-range seedboxes with good performance (read: human configurable) typically use Transmission 15 or Deluge 12 instead. Lower performance, and very user friendly, seedboxes typically use uTorrent v2.2.1 2 (Windows only) or qBitTorrent 4 (cross platform). While other 4 applications 2 may support the BitTorrent 1 protocol, they are not appropriate for seedboxes. Except for rTorrent, modern seedbox quality BitTorrent clients have integrated web interfaces that offer basic functionality.

For the purposes of this tutorial, Quickbox 180 software will be used. It is essentially a well supported push-button style installer script for rTorrent/ruTorrent hosted on Github for Debian/Ubuntu. The notable features are that it actually works, unlike literally 18 everything 13 else 14, including 10 manual setup 19. An honorable mention is that while it cannot run natively, the docker version 14 of rTorrent looks promising, but non-native means it would be better to just use Transmission instead.

In case Quickbox dies at some future date, the landscape’s alternatives should now be clear.

Quickbox Resources:

Further Reading:

Quickbox Command Reference:

  • reload – Alias that restarts the seedbox services, i.e; rtorrent & irssi.
  • fixhome – Quickly adjust /home directory permissions.
  • showspace – Shows amount of space used by each user.

  • createSeedboxUser – Creates a shelled seedbox user.
  • deleteSeedboxUser – Deletes a created seedbox user and their directories (permanent).
  • changeUserpass – Change users SSH/FTP/deluge/ruTorrent password.
  • setdisk – Set your disk quota for any given user (must be implemented seperately 15).

  • upgradeDeluge – Upgrades deluge when new version is available.
  • upgradeBTSync – Upgrades btsync when new version is available.
  • upgradePlex – Upgrades Plex when new version is available.
  • upgradeJacket – Upgrades Jacket when new version is available.
  • upgradepyLoad – Upgrades pyLoad when new version is available.
  • setup-pyLoad – installs pyLoad
  • quickVPN – Something about VPNs.
  • removepackage-cron – upgrades your system to make use of systemd + (must be on Ubuntu 15.10+ or Debian 8)
  • clean_mem – flushes servers physical memory cache (helps avoid swap overflow)

Of note here is that Quickbox does not support multi-user configurations on a vanilla install. Care must be taken to manually ensure each rTorrent session is unique, with unique FCGI ports, and to set up disk quotas properly. A lazier alternative is to use containers/VMs to support multiple users and implement quotas using ZFS instead.

As root in the seedbox container…

cd ~
apt-get -yqq update; apt-get -yqq upgrade; apt-get -yqq install git lsb-release
git clone /etc/QuickBox
bash /etc/QuickBox/setup/quickbox-setup

Xen Project hypervisor
Hyper-V虚拟机的物理设备直通(Discrete Device Assignment, DDA)与显卡直通实践
Kernel Virtual Machine Blogging about open source virtualization





早期的虚拟化模型被称为Type 1,或者叫本地虚拟化(native virtualization),这种模型下hypervisor直接运行在硬件之上,在hypervisor上面是虚拟机
主机虚拟化(hosted virtualization)模式,被称为Type 2,hypervisor运行在操作系统之上,在同一平台上允许两个或更多的操作系统共存

闭源的 VMware ESXi 还是开源的 KVM

Nutanix 的 AHV(基于 KVM),同样支持 VMware 虚拟化计算平台

VMware 的 vSphere(基于 ESXi)

SmartX 的 Elf(基于 KVM),同样支持 VMware 虚拟化计算平台

KVM 作为开源的 Hypervisor 被很多厂商选用,但各家需要实现自己的虚拟化计算管理平台,除了基本的 VM 生命周期管理,还至少需要实现企业级常用的功能,如:VM HA、、虚拟分布式交换机、共享盘等

硬件虚拟化 或者叫做平台虚拟化

硬件虚拟化:完全虚拟化( full-virtualization)和半虚拟化(para-virtualization)





hypervisor是Linux Kernel Virtual Machine(KVM),支持本地虚拟化和主机虚拟化模型。

KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko.


KVM is open source software. The kernel component of KVM is included in mainline Linux, as of 2.6.20. The userspace component of KVM is included in mainline QEMU, as of 1.3.

KVM也是第一个完全集成在主线内核(mainline kernel)的hypervisor,由Rad Hat开发。

无论是完全虚拟化还是半虚拟化,都应用了硬件协助虚拟化(hardware-assisted virtualization)。新的AMD和英特尔CPU都集成了优化hypervisor的指令集,来增强Guest虚拟机的I/O性能。


操作系统虚拟化是另外一个重要的虚拟化技术,正如其名,是对操作系统本身进行虚拟化,而不是平台。在这种方式下,操作系统提供一组用户空间(User-Space userland)彼此隔离,而应用被限制在每个用户空间里面,就好像一个独立的主机。这种形式的虚拟化在虚拟主机环境中非常流行,让多个独立的用户可以共享一个操作系统。




Linux 模拟器




FreeBSD is UNIX from the ‘90s
FreeBSD is good for servers, not for Desktop
that OS X is just FreeBSD with a pretty GUI
FreeBSD Makes Me Compile Everything From Sourc
DTrace and ZFS All of the Good Bits of FreeBSD Come from Solaris
iXsystems, a company that supports FreeNAS
FreeBSD Has No Drivers
After 4.x FreeBSD Went Downhill
FreeBSD Lacks Software
FreeBSD Does Not Support Virtualisation
BSD license VS GPL The BSD License Means Companies Don’t Contribute Back
ZFS on Linux project

DS918+ DS920+
CPU Intel Celeron J3455 Quad Core 1.5 GHz (up to 2.3 GHz) 2 MB Cache Intel Celeron J4125 4-core 2.0 GHz burst up to 2.7 GHz 4 MB Cache
Benchmark 2153 3035
Socket FCBGA1296 FCBGA1090
GPU Intel HD Graphics 500 250 – 750 MHz (8GB) Intel UHD Graphics 600 250 – 750 MHz (8GB)
RAM DDR3L 4GB Non-ECC SO-DIMM (1 slot free) 1866 MT/s (Upgrade up to 8GB) 1X 4 GB DDR4 (expandable up to 8 GB) 2400 MT/s
RAM slots 2X 1X
Cache 2 x M.2 2280 NVMe SSD (drives not included) 2 x M.2 2280 NVMe SSD (drives not included)
External port • 2 x USB 3.0 port • 1 x eSATA port • 2 x USB 3.0 port • 1 x eSATA port
LAN 2 x Gigabit (RJ-45) 2 x Gigabit (RJ-45)
Encryption Yes (AES-NI) Yes (AES-NI)
Power 28.8W/ 4.25W 32.17 W / 9.69 W
Noise value 19.8 dB(A) 19.8 dB (A)
Codec h264 Decode / Encode Decode / Encode
Codec h265 8bit Decode / Encode Decode
Codec h265 10bit Decode NO
Codec VP8 Decode / Encode Decode / Encode
Codec VP9 Decode Decode / Encode
Codec VC-1 Decode Decode
Codec AVC Decode / Encode Decode / Encode
PLEX HD Yes (mostly) Yes (mostly)
PLEX 4K Yes (without transcoding) Yes (without transcoding)
Native 1080p Yes (Mostly) Yes (Mostly)
Native 4K Yes (Mostly) Yes (Mostly)
VM Support Yes, Depending on Memory Allocated Yes, Depending on Memory Allocated
Containers Yes, Depending on Memory Allocated Yes, Depending on Memory Allocated
File System EXT4 and BTRFS EXT4 and BTRFS
Backup Types NAS-to-(NAS,PC, Mac, Mobile, USB, Cloud) NAS-to-(NAS,PC, Mac, Mobile, USB, Cloud)


Wiitek SFP+ to RJ45 Copper Modules, 10GBase-T Transceiver Compatible for Cisco SFP-10G-T-S, Ubiquiti, D-Link, Supermicro, Netgear, Mikrotik, Unifi (Cat 6a/7, 30-Meter)

MikroTik 5-Port Desktop Switch, 1 Gigabit Ethernet Port, 4 SFP+ 10Gbps Ports (CRS305-1G-4S+IN)

ROS 3865U


明基(BenQ)Qcast Mirror 无线投屏器 2.4G/5G双频 高清 投影仪同屏器hdmi视频传输器 苹果安卓 无线同屏器
投影仪距离幕布越远,画面越大; 如果先确定画面大小,就能得到投影仪距离幕布的最小和最大距离;如果先确定投影仪距离幕布多远,就能得到画面尺寸。
机器安装高度具体根据您幕布高度来定哦img 机器正放的话,镜头对着幕布下沿;机器吊装(机器要倒置)的话,镜头对着幕布上沿~

除湿机 抽湿机 我们商品原厂配件是不带水管的,您有需要的话可以自行附近市场购买呢,水管内径是16mm





Lexar 3 in 1 card reader

SAMSUNG 256G SD card 测试

SD 优势是大文件 顺序的读写
SSD 优势是4K random access
random access image-20200709104559291

When to use VDI, server-based computing, and how Citrix Ardence dynamic desktop fits into all this
Citrix HDX
XenDesktop.&text=In%20other%20words%2C%20the%20difference,a%20desktop%20or%20an%20application.]( main difference is how,SBC (Server Based Computing).&text=In other words%2C the difference,a desktop or an application.))