Setup network interface in linux systems

Κάποιες χρήσιμες εντολές για το σετάρισμα κάρτας δικτύου (π.χ. eth0) σε περιβάλλον linux.

  • View:  ifconfig -a (ή eth0)
  • Assign ip address to interface: ifconfig eth0 192.168.1.102 netmask 255.255.255.0 up

ifconfig’s syntax and command layout:

ifconfig <interface> <ip_address> [ netmask <netmask> ]

Where:
<interface> = the network interface you want to configure (eth0, eth1… and so on)
<ip_address> = the ip address you want to assign to the interface (example:  1.1.1.1)
<netmask> = the subnet mask of your assigned network (example: 255.255.255.0)

  • Gateway:  route add default gw 1.1.2.2 eth0

route’s syntax and command layout:
route [add default gw] <ip_address> <interface>

Where:
[add default gw] = Sets up a route to add a default gateway for a network interface
<ip_address> = the ip address of the network gateway
<interface> = the network interface you are setting up a route for on your machine

  • Nameservers (/etc/resolv.conf)

Κάνουμε edit το αρχείο /etc/resolv.conf με την εντολή e3 /etc/resolv.conf ή vim /etc/resolv.conf

Once you have the file open for editing, you will need to type this line for EACH DNS server address you want to enter:

nameserver <ip_address>

So, we would need to type this into the /etc/resolv.conf file:

nameserver 3.3.3.1
nameserver 3.3.3.2

2 thoughts to “Setup network interface in linux systems”

  1. Ubuntu / Debian IP Configuration Files:

    File: /etc/network/interfaces

    Static IP example:

    auto lo
    iface lo inet loopback

    auto eth0
    iface eth0 inet static
    address 208.88.34.106
    netmask 255.255.255.248
    broadcast 208.88.34.111
    network 208.88.34.104
    gateway 208.88.34.110

    Dynamic IP (DHCP) example:

    auto lo
    iface lo inet loopback

    auto eth0
    iface eth0 inet dhcp

    auto eth1
    iface eth1 inet dhcp

    auto eth2
    iface eth2 inet dhcp

    auto ath0
    iface ath0 inet dhcp

    auto wlan0
    iface wlan0 inet dhcp

    Interfaces:

    * lo: Loopback interface (network within your system without slowing down for the real ethernet based network)
    * eth0: First ethernet interface card
    * wlan0: First wireless network interface

    Also see “man interfaces”

  2. How do I restart Linux network service?
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    Last updated: Dec/2/2007by Vivek Gite · 14 comments

    RedHat Linux command to reload or restart network (login as root user):

    # service network restart
    OR
    # /etc/init.d/network restart

    To start Linux network service:
    # service network start

    To stop Linux network service:
    # service network stop

    Debian Linux command to reload or restart network:
    # /etc/init.d/networking restart

    To start Linux network service:
    # /etc/init.d/networking start

    To stop Linux network service:
    # /etc/init.d/networking stop

    Ubuntu Linux user use sudo command with above Debian Linux command:
    # sudo /etc/init.d/networking restart

    To start Linux network service:
    # sudo /etc/init.d/networking start

    To stop Linux network service:
    # sudo /etc/init.d/networking stop

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