Linux (1): linux change IP address command _ change DNS _ change default gateway _ change subnet mask _ host name, linuxdns

Linux (1): linux change IP address command _ change DNS _ change default gateway _ change subnet mask _ host name, linuxdns

How to use commands to change the linux IP address, DNS, and subnet mask, and add a Linux virtual machine to the Virtual Machine (vitrualBox;

Installation: http://pan.baidu.com/s/1sjJPhP7

After installation, go to the Linux desktop, which is like this:

Press CTRL + ALT + F2 to enter the command line window, log on, and enter:

vi  /etc/sysconfig/network-scripts/ifcfg-ethx

The setting window is opened. By default, if you only have one Nic, you can do this. If there are multiple NICs, the NIC may be divided into 0 and 1:

vi  /etc/sysconfig/network-scripts/ifcfg-ethx0vi  /etc/sysconfig/network-scripts/ifcfg-ethx1

If there are two NICs, set them separately;

Open a file, which will display the following:

You just need to set the parameters in it, as shown in the annotation:

Press the "Insert" key on the disk to enter the change. After all the configurations are complete, press the Esc key and enter the following three letters: wq: Write, save, and exit;

Then execute the command

vi  /etc/sysconfig/network-scripts/ifcfg-ethx

We can see that our changes have been saved.

Set the local virtual Virtualize uralbox-Host-only Network. Right-click the Network in the lower right corner and open the Network center. This item is displayed:

Click Settings-> properties-> IP4-> Settings

The IP address here is preferably the gateway set in the virtual machine;

After completing the settings, let's try to see if the Ping is successful:

If you can Ping the host name, set its host name as follows:

By now, the system of the virtual machine can be used. We can connect to the system by using a remote tool. We use putty to download the Chinese version of putty.

Then, log on. After the logon is successful, run vi/etc/hosts.

Go to settings and press "insert" to set the settings. The format is IP host name, for example:

After the modification, Press Esc and enter wq to save and exit. At the same time, change the command to vi/etc/sysconfig/network.

Set the Host Name:

The right side of the equal sign is the host name to be set. After setting, press "ESC" and enter: wq to exit;

It does not take effect after exiting. Enter the command hostname redhat1 and press enter, and enter su-to change it temporarily:

But this is only temporary. If you want to change it permanently, You need to restart Linux.