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Check the Linux network environment.

Check the Linux network environment.

●Use "ip -a" to check the network device.

[root@Lion ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 74:46:a0:fe:f9:5c brd ff:ff:ff:ff:ff:ff
inet 192.168.11.62/24 brd 192.168.11.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet6 fe80::7646:a0ff:fefe:f95c/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether 74:46:a0:fe:f9:5d brd ff:ff:ff:ff:ff:ff

Check "eth0" above.

In order to check the Linux network environment, check the following five points.

1.Configure the network card

[root@Lion ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
UUID=3c4021ab-eec3-4706-9667-99f9d893f34c
DEVICE=eth0
ONBOOT=yes
IPADDR=192.168.11.62
PREFIX=24
GATEWAY=192.168.11.1
DNS1=192.168.11.1
 DEVICE=eth0      #Device name
 BOOTPROTO=static      #Manual configuration or dhcp?
 BROADCAST=192.168.1.255 #Broadcast address
 IPADDR=192.168.1.38 #IP address of the device
 NETMASK=255.255.255.0 #Mask Value
 NETWORK=192.168.1.0 #network address
 HWADDR=00:14:2A:41:F9:1F #MAC address
 ONBOOT=yes #IF setting is done automatically at startup.

 2.DNS Settings

[root@Lion ~]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.11.1

3.Setting the host name

[root@Lion ~]# cat /etc/hostname
Lion

4.Gateway Settings

[root@Lion ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
YPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
UUID=3c4021ab-eec3-4706-9667-99f9d893f34c
DEVICE=eth0
ONBOOT=yes
IPADDR=192.168.11.62
PREFIX=24
GATEWAY=192.168.11.1
DNS1=192.168.11.1

5.Display the routing table

[root@Lion ~]# netstat -r
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
default buffalo.setup 0.0.0.0 UG 0 0 0 eth0
192.168.11.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

6.Ping the router to confirm communication

[root@Lion ~]# ping -c 4 192.168.11.1
PING 192.168.11.1 (192.168.11.1) 56(84) bytes of data.
64 bytes from 192.168.11.1: icmp_seq=1 ttl=64 time=0.321 ms
64 bytes from 192.168.11.1: icmp_seq=2 ttl=64 time=0.290 ms
64 bytes from 192.168.11.1: icmp_seq=3 ttl=64 time=0.318 ms
64 bytes from 192.168.11.1: icmp_seq=4 ttl=64 time=0.294 ms--- 192.168.11.1 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3000ms
rtt min/avg/max/mdev = 0.290/0.305/0.321/0.025 ms
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