ftp,dhcp

run

#FTP

sudo apt-get install vsftpd

sudo service vsftpd start

ftp localhost

#Den receive data by get  -> get filename

#and send by put  -> put filename

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#DHCP

sudo apt-get install isc-dhcp-server

#open the isc-dhcp-server file which is located in /etc/default/isc-dhcp-server

sudo gedit /etc/default/isc-dhcp-server

#changes interfaces in the last line to 

#interfaces = "eth0"

#open the dhcpd.conf which is  located in /etc/dhcp/dhcpd.conf

sudo gedit /etc/dhcp/dhcpd.conf

#now define lease time ( default and max lease time ) optional  domain name and domain name servers , the range of IP addresses #that  you want DHCP server to assign to hosts , the network address , the subnet mask

#use this configuration.

# subnet 192.168.1.0 netmask 255.255.255.0 {
#   range 192.168.1.80 192.168.1.90;
#  option domain-name-servers ns1.internal.example.org;
#  option domain-name "internal.example.org";
#  option routers 192.168.1.1;
#  option broadcast-address 192.168.1.255;
#  default-lease-time 60;
#  max-lease-time 60;
# }

#After making changes to the configuration files  , save them and start the DHCP server by typing the command-

sudo service isc-dhcp-server start.

# After this connect to the client via ethernet cable.

# Make sure that the network settings are selected to DHCP at the client's site.

# Now type the command ifconfig at terminal at client's site.

# You will notice that the ip assigned to client is in between the range we defined for the DHCP server.

# You can check for the exact process running at the background by checking system log file.