Ubuntu command line Modify network configuration Method _unix Linux

1. Configure network adapters by DHCP
Edit File/etc/network/interfaces:
sudo vi/etc/network/interfaces
Use the following line to replace the line about eth0:
# The primary network Interface-use DHCP to find we address
Auto Eth0
Iface eth0 inet DHCP
Use the following command to make the network settings effective:
sudo/etc/init.d/networking restart
You can also enter the following command directly at the command line to get the address
sudo dhclient eth0
2. Configure a static IP address for the network card
Edit File/etc/network/interfaces:
sudo vi/etc/network/interfaces
Use the following line to replace the line about Eth0: # The Primary network interface
Auto Eth0
Iface eth0 inet Static
Address 192.168.3.90
Gateway 192.168.3.1
Netmask 255.255.255.0
#network 192.168.3.0
#broadcast 192.168.3.255
You can change the IP address and other information to your own. Use the following command to make the network settings effective:
sudo/etc/init.d/networking restart
3. Set a second IP address (virtual IP address)
Edit File/etc/network/interfaces:
sudo vi/etc/network/interfaces
Add the following line to the file:
Auto Eth0:1
Iface eth0:1 inet Static
Address 192.168.1.60
Netmask 255.255.255.0
Network x.x.x.x
Broadcast x.x.x.x
Gateway x.x.x.x
Fill in all information, such as address,netmask,network,broadcast and gateways, according to your situation.
Use the following command to make the network settings effective:
sudo/etc/init.d/networking restart
4. Set host name (hostname)
Use the following command to view the host name of the current host:
Sudo/bin/hostname
Use the following command to set the host name of the current host:
Sudo/bin/hostname newname
When the system starts, it reads the name of the host from the/etc/hostname.
5. Configure DNS
First, you can add some host names and IP addresses for these host names in the/etc/hosts, which is a simple static query using this machine.
To access the DNS server for querying, you need to set the/etc/resolv.conf file.
Assuming that the IP address of the DNS server is 192.168.3.2, then the contents of the/etc/resolv.conf file should be:
Search test.com
NameServer 192.168.3.2