Scan network routing and list LAN interfaces ports

sudo apt install nmap

sudo apt install net-tools

ifconfig

ip link

nmcli

netstat

route

ss // show network status

ping 8.8.8.8

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=119 time=143 ms

nmcli dev status

DEVICE   TYPE      STATE      CONNECTION          
enp0  ethernet  connected  Wired connection 1  
lo       loopback  unmanaged  --    

nmap -p- localhost // scan port and show ports on localhost

Starting Nmap 7.92 ( https://nmap.org ) at 2022-09-25 12:32 EEST
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000066s latency).
Not shown: 65529 closed tcp ports (conn-refused)
PORT      STATE SERVICE
139/tcp   open  netbios-ssn
445/tcp   open  microsoft-ds
631/tcp   open  ipp
1716/tcp  open  xmsg
27017/tcp open  mongod
29898/tcp open  unknown

Nmap done: 1 IP address (1 host up) scanned in 1.81 seconds

nmap -sP 192.168.1.0/24 // ping scan (ICMP Ping Only)

Starting Nmap 7.92 ( https://nmap.org ) at 2022-09-25 12:37 EEST
Nmap done: 256 IP addresses (0 hosts up) scanned in 104.19 seconds

sudo nmap -sn 192.168.1.0/24 // ping sweep from 192.168.1.1 to 192.168.1.254

nslookup <IP_address>

traceroute

hostname -i

hostname -I

nmap - Network exploration tool and security / port scanner

nmcli - command-line tool for controlling NetworkManager

dhclient - Dynamic Host Configuration Protocol Client