VirtualBox - Network Adapter Settings
SimpleArbiterDhcp ..... adapter (1) - internal network
FileServer ............ adapter 1 - NAT
	   ............ adapter 2  - internal network

FileServer
1. Set up a DHCP server
	1.1 apt-get update
	1.2 apt-get install isc-dhcp-server
	1.3 There is an error. No worries:
		- in file/etc/default/isc-dhcp-server set on which interface your DHCP server shoud run
		- in file /etc/dhcp/dhcpd.conf set your subnet (address, mask, rang etc.)
		- set static ip for SimpleArbiterDhcp's MAC

2. Set up a NFS server
	2.1 apt-get install nfs-kernel-server
	2.2 Define export rules in file /etc/exports 
		<shared_dir> <your_subnet/specific_user/specific_ip>(<rule>)
		E.g.: /srv/nfs/ERLbbBrT 192.168.0.0/24(ro,sync)
		For IP from step 1.3 define a rule with rw permission

SimpleArbiterDhcp
3.) Run mount command as root: mount -t nfs <nfs_server_ip>:<shared_dir> <"dest">

In directoriy <"dest"> that you specified earlier you should be able to access shared files.

Samba - FileServer
4. Set up a SMB server
	4.1 apt-get install samba
	4.2 Somewhere on the server create dir urania-03.
	4.3 In file /etc/samba/smb.conf under [global] mark define netbios name value as zarptica-32
	under [home] mark set path to dir urania-03 path = <path_to_urania-03>