Using VirtualBox to install CentOS7
Installation resource preparation
With VirtualBox software and CentOS7, the installation media can be obtained by email.
Linux environment preparation
Modify the parameter, and change ONBOOT to yes:
Posted on Thu, 02 Apr 2020 08:05:20 -0400 by coldkill
1. First shut down the virtual machine and view the properties of hard disk allocation: allocate storage for dynamic allocation
2. Enter the virtual box installation directory
#cd /Users/gds/VirtualBox VMs/gds
#VBoxManage list hdds
Parent UUID: base
Posted on Tue, 31 Mar 2020 05:13:51 -0400 by Jagarm
Using vagrant to build environment
Vagrant is a popular tool in recent years, through which we can automatically create a running environment and realize infrastructure as code.
vargrant has the following great movies.
Convenient sharing environment
By sharing the code needed to build the environment, anyone can rebuild the same environment
Posted on Wed, 25 Mar 2020 13:36:15 -0400 by Goose
17.1 APIC device simulation
In VirtualBox, APIC is used as a PNP device of R0 to simulate:
const PDMDEVREG g_DeviceAPIC =
/* .u32Version = */ PDM_DEVREG_VERSION,
/* .uReserved0 = */ 0,
/* .szName = */ "apic",
/* .fFlags = */ PDM_D ...
Posted on Thu, 06 Feb 2020 07:33:25 -0500 by damnedbee
Win-Virtualbox Technical Documentation.md
tags: Virtual Machine Virtualbox November 2019
VirtualBox Known as the best free virtual machine software, it not only has rich features, but also has excellent performance!It is easy to use, and virtual systems include Windows (from ...
Posted on Sat, 01 Feb 2020 20:05:51 -0500 by zachatk1
If virtualbox fails to start after ubuntu update, it is usually caused by the mismatch between the default working gcc version and the system gcc version.
Check the gcc version. If there are multiple gcc versions, switch to the default gcc version of the system.
~$ ls /usr/bin/gcc*
/usr/bin/gcc /usr/bin/gcc-7 /us ...
Posted on Wed, 22 Jan 2020 11:08:35 -0500 by sup
Direct installation and download
Install minikube, and use the following command (specify the domestic address because of the problem with the wall)
curl -Lo minikube <http://kubernetes.oss-cn-hangzhou.aliyuncs.com/minikube/releases/v0.30.0/minikube-darw ...
Posted on Thu, 05 Dec 2019 20:26:59 -0500 by dieselmachine
The generated form used to create the list.
To generate list [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], you can use list(range(1, 11)): note 11
>>> list(range(1, 11))
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
How to generate [1x1, 2x2, 3X3,..., 10x10]? The first method is circulation:
>>> L = 
>>> for x in range(1, ...
Posted on Mon, 02 Dec 2019 00:08:12 -0500 by digitalgod
H3C version HCL_V2.1.0_Setup
VirtualBox version VirtualBox-4.2.4-81684-Win
(Versions need to be matched to use H3C properly)
Two switches are used to enable the host to communicate between different vlan s.
Network structure:IP address settings:
Posted on Sat, 05 Oct 2019 07:02:50 -0400 by RossC0
When we develop programs, the running environment we use is usually our own computer, Windows, Mac or Linux operating system, which can run the software well most of the time. However, many modern applications are distributed. In a production environment, multiple nodes form a cluster, and each node is deployed on different machines. ...
Posted on Sun, 28 Jul 2019 03:04:25 -0400 by fiona