Set the ip address of the linux system in the virtual machine

1. linux vi save instruction

    

   Press ESC to jump to command mode, then:

2. :w save file without exiting vi
   :w file additionally save changes to file without exiting vi
   :w! force save without exiting vi
   :wq save file and exit vi
   :wq! force save file and exit vi
   q: Do not save the file, exit vi
   :q! Do not save the file, force quit vi
   :e! Abandon all changes, start editing from the last time the file was saved 

    

    

    

   Use the root user to log in to linux and open the terminal

    
3.  

   In terminal enter: vi /etc/sysconfig/network-scripts/ifcfg-eth0

    
4.  

   After returning,

   Start editing, fill in the ip address, subnet mask, gateway, DNS, etc.

   ONBOOT=yes Boot automatically
   BOOTPROTO=static static ip
   DNS1=192.168.1.1 dns
   IPADDR=192.168.3.235 ip address
   NETMASK=255.255.255.0 subnet mask
   GATEWAY=192.168..3.1 gateway

1.  

   After editing, save and exit Note: How to exit and save: Press esc ->Shift+: ->wq

   restart network service

   service network restart或/etc/init.d/network restart

   Then ping the gateway and ping the external network for testing. All pings indicate that the network is normal

    
2.  

   Detailed summary:

   ---Modify ip address---

   Immediately effective:

   # ifconfig eth0 192.168.1.155 netmask 255.255.255.0

   Restart to take effect:

   修改vi /etc/sysconfig/network-scripts/ifcfg-eth0

   ---Modify default gateway---

   Immediately effective:

   # route add default gw 192.168.1.1

   Restart to take effect:

   修改vi /etc/sysconfig/network-scripts/ifcfg-eth0

   ---Modify dns---

   Modify vi /etc/resolv.conf

   The modification takes effect immediately, and restart is also effective

   ---Modify host name---

   Immediately effective:

   # hostname test1

   Restart to take effect:

   Modify vi /etc/sysconfig/network