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Network in linux.md

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#Cấu hình mạng trên Linux ##1 - UBUNTU ###1.1 Xem cấu hình tất cả card mạng

ifconfig -a

Kết quả:

eno16777736 Link encap:Ethernet  HWaddr 00:0c:29:e3:25:80  
          inet addr:192.168.1.69  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fee3:2580/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:741 errors:0 dropped:0 overruns:0 frame:0
          TX packets:417 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:88231 (88.2 KB)  TX bytes:58028 (58.0 KB)

eno33554992 Link encap:Ethernet  HWaddr 00:0c:29:e3:25:8a  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:160 errors:0 dropped:0 overruns:0 frame:0
          TX packets:160 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:11840 (11.8 KB)  TX bytes:11840 (11.8 KB)

###1.2 Xem hostname

hostname

Sửa host name ở file

/etc/hostname

###1.3 File host

/etc/hosts

###1.4 Cấu hình ip tĩnh, dns,.. Sửa file interfaces

/etc/network/interfaces
auto eno16777736

iface eno16777736 inet static

address 192.168.10.221

netmask 255.255.255.0

gateway 192.168.10.1

nameserver 8.8.8.8

###1.5 Restart Network Interface

/etc/init.d/networking restart

##2 - RedHat, CentOS ###2.1 Xem cấu hình tất cả card mạng

ifconfig -a

Kết quả:

eno16777736 Link encap:Ethernet  HWaddr 00:0c:29:e3:25:80  
          inet addr:192.168.1.69  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fee3:2580/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:741 errors:0 dropped:0 overruns:0 frame:0
          TX packets:417 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:88231 (88.2 KB)  TX bytes:58028 (58.0 KB)

eno33554992 Link encap:Ethernet  HWaddr 00:0c:29:e3:25:8a  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:160 errors:0 dropped:0 overruns:0 frame:0
          TX packets:160 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:11840 (11.8 KB)  TX bytes:11840 (11.8 KB)

###2.2 Hostname

/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=prodnode02.acme.com

###2.3 File Host

/etc/hosts
192.168.0.0 prodnode01.acme.com

###2.4 Changing Network Configuration Name server configuration is in

/etc/resolv.conf:
search acme.com
nameserver 10.0.0.1
nameserver 8.8.8.8

Set ip static in

/etc/sysconfig/network-scripts/ifcfg-ethX
DEVICE="eth0"
BOOTPROTO="none"
ONBOOT="yes"
TYPE="Ethernet"
IPADDR=10.0.0.42
NETMASK=255.255.255.0
BROADCAST=10.0.0.255
GATEWAY=10.0.0.1