commands for modifying IP and DNS in Linux systems

Linux Modify IP, DNS, routing command line settings ubuntu version of the command line set IP

Cat/etc/network/interfaces

# This file describes the network interfaces available on your system

# and how to activate them. For more information, interfaces (5).

# The Loopback network interface

Auto Lo

Iface Lo inet Loopback

# The Primary network interface

Auto Eth0

Iface eth0 inet Static

Address 192.168.1.104

Netmask 255.255.255.0

Network 192.168.1.0

Broadcast 192.168.1.255

Gateway 192.168.1.2

# Dns-* options are implemented by the RESOLVCONF package, if installed

Dns-nameservers 58.22.96.66 218.104.128.106 202.101.138.8

Dns-search. COM

Reboot network card:/etc/init.d/networking Restatr

Redhat Linux version command line set IP:

ifconfig eth0 New IP

Then edit/etc/sysconfig/network-scripts/ifcfg-eth0, modify IP

First, modify the IP address

[Aeolus@db network-scripts]$ VI Ifcfg-eth0

Device=eth0

Onboot=yes

Bootproto=static

ipaddr=219.136.241.211

netmask=255.255.255.128

gateway=219.136.241.254

Second, modify the gateway

Vi/etc/sysconfig/network

Networking=yes

Hostname=aaron

gateway=192.168.1.1

Third, modify DNS

[Aeolus@db etc]$ VI resolv.conf

NameServer 202.96.128.68

NameServer 219.136.241.206

Four, restart network configuration

/etc/init.d/network Restart v. Example

1. Modify IP Address

Immediate effect:

# ifconfig eth0 192.168.0.20 netmask 255.255.255.0

Start in effect:

Modify/etc/sysconfig/network-scripts/ifcfg-eth0

2, modify the default gateway

Immediate effect:

# route add default GW 192.168.0.254

Start in effect:

Modify/etc/sysconfig/network-scripts/ifcfg-eth0

Modify DNS

Modify/etc/resolv.conf

Can be effective immediately after modification

3. Modify Host Name

Immediate effect:

# hostname FC2

Start in effect:

Modify/etc/sysconfig/network

Ps:

Device=eth0

Bootproto=static

ipaddr=192.168.8.85

netmask=255.255.248.0

gateway=192.168.8.1

Hwaddr=00:0uu3:47:2c:d5:40

Onboot=yes

4: Add Linux system Startup items:

Vi/etc/rc.d/rc.local

Modify the port number of the Linux system ssh

Modify the port number of Linux system SSH OS Linux and UNIX are all applicable: Modify the configuration file/etc/ssh/sshd_config, change the inside port to a new one (this port must be no program to use), such as 10022, and then

Kill-hup ' Cat/var/run/sshd.pid ' will do. Note: The existing connection itself will not break because Kill-hup '

Modify the port number of the Linux system ssh

Operating system Linux and UNIX are available:

Modify the configuration file/etc/ssh/sshd_config to change the inside port to a new one (this port must be used without a program), such as 10022,

Then Kill-hup ' Cat/var/run/sshd.pid ' on the line.

Note: The existing connection itself will not break, because Kill-hup ' cat/var/run/sshd.pid ' is just the one that HUP listening, the connection that has been established (different PID) will not break.

To re-enable and log on with the new port, you can exit with the exit command under this login account and log on with the new port!

Note : More wonderful tutorials Please pay attention to the triple computer tutorial section, triple Computer group: 189034526 welcome you to join