IPV4 Address: 32-bit

192.168.2.34

--

IPv6 address : 128 bit : 8 groups of 4 hex digits

3ffe:1900:fe21:4545:0000:0000:0000:0000

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IPV6 Format (From AI Tools/OpenAI/ChatGPT)


ifconfig command output: to know your network interface configurations.

ifconfig





Explain the output of the Linux Command (From AI Tools/OpenAI/ChatGPT/Interney)
ifconfig




instead of ifconfig you can use ip address show command

command: ip address show
Output as follows:




Explain the output of ip address show




Find device and link information using the ip command:  ip link show
The connection of a network interface to another device is called a link

Output of ip link show





To get Device statistics: ip -s link show

Output as follows:




Ip Address : Assign, See, and Delete
ip address add 192.168.2.22/24 brd + dev ens18
ip address show dev ens18
ip address del 192.168.2.22 dev ens18
ip link set eth0 up
ip link set eth0 down


SHOW Routing Table:

ip route show


ip route list dev ens18



Routing Commands: Modifications

ip route add <network/mask> via <gateway_IP>
ip route add 192.168.1.1/24 via 10.0.2.10
ip route add default via <gateway_IP>
ip route add default via 10.0.2.11
ip route add <NETWORK/MASK> dev <DEVICE>
ip route add 192.168.254.1/24  dev ens33

Others:

ip route delete ...
ip route change ...
ip route flush ..
ip route flush table


Know about Netplan:
Path:  /etc/netplan
/etc/netplan/*.yaml are some important configuration files.

Netplan commands:
netplan apply
netplan generate
netplan try

ping command:

ping hostname
ping ip_address
Example:


host command:
Finds IP from host name
Example:




dig command:

Also, to find the IP address from the name.
dig www.google.ca

Example Output:



nslookup

Also, to find the IP address from the name.
nslookup www.google.ca


Example:
nslookup www.google.ca


Last modified: Saturday, 30 August 2025, 7:40 PM