Install FreeBSD in virtual box in Windows 7

1. Oracle VM Virtual Box:
https://www.virtualbox.org/
2.  freebsd
https://www.freebsd.org/
I use Intel I5, according to freebsd installation menu:
https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/bsdinstall-hardware.html
FreeBSD/amd64 should be used for AMD64 processors, Intel® Core™ i3, i5 and i7 processors and more.
https://www.freebsd.org/releases/10.0R/announce.html
 ftp://ftp.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/10.0/
get and save around 2.3GB
FreeBSD-10.0-RELEASE-amd64-dvd1.iso
I put it in (any directory is fine)
C:\Users\jiansen\VirtualBox VMs\iso
Open Oracle VM VirtualBox Manager
New
Name: FreeBSD 10 AMD64
Type BSD
Version: FreeBSD (64 bit)
The recommended of memory size is 128 MB, I set it 256 MB
create a virtual hard drive now
select VDI
dynamic allocated
chose 20GB
In Virtual box

go to Settings->Storage
Beside CD/DVD Drive, choose a virtual  CD/DVD file
got to the directory FreeBSD-10.0-RELEASE-amd64-dvd1.iso is located
and select FreeBSD-10.0-RELEASE-amd64-dvd1.iso
check live CD/DVD
Start or reset FreeBSD 10 AMD 64  (my name for this virtual server)
You need to type your hostname in the Set Hostname screen, I suggest "freebsd" but you might want another name for it. If you plan to use this system to host a network service like Kerberos or LDAP you might want to use a full qualified domain name here.
then choose default and click OK
hostname can be changed later:

As root, type "hostname <new hostname>", and the hostname will be changed
immediately. To make this change permanent across reboots, edit the file
'/etc/rc.conf', and add the following line:

 hostname="new.host.name"

The '/etc/rc.conf' file is described here:

set root password (I temporaly set it as password)password

 In the Network Configuration screen, select "<Yes>" for "IPv4", 
select "<Yes>" for "DHCP", select "<No>" for IPv6 
(VirtualBox 4.1.10 has limited support for IPv6) and select "<OK>"
 in the resolver configuration (your DNS servers should be there already
 but be sure to type at least one IP address if your fields are blank), in my case

Resolver configuration user network configuration, the following is already there

Search vchri.med.ubc.ca

IPV4 DNS #1: 142.103.1.1 

UTC time, select NO

select America, select 11 Canada
27 Pacific Time - West British Columbia (PDT)
create user jiansen jiansen  uncapture mouse right+ctrl
remember to unmount your virtual CD when the VirtualBox logo appears or it might boot from it again.  Devices->CD/DVD device uncheck bsd, force unmount

Post-Installation:

A minimal system is running, here is what you need to know in order to get started in the FreeBSD world.

Keep your Kernel updated

You probably want to check if there are updates (especially security ones) for your Kernel, use the following command to get the updates available:

 freebsd-update fetch

If updates are found, use the following command to install them:

 freebsd-update install

To install an application, using
pkg install curl