Linux networking tools

ping example.com
traceroute example.com

dig <any_url>

netstat -ntpul

lsof -i -P -n
lsof -i -P -n | grep LISTEN

nc -l -p 1337 # the receiver
nc localhost 1337 # the sender
# then type something, then enter, it should be transfered to the receiver

telnet 15.0.0.93 4648

nmap -Pn -p 4648 15.0.0.93

nmap -sP <current_ip>/24

sudo arp-scan --interface=<current_interface> --localnet

# debian
apt install dnsutils # for dig, etc.
apt install net-tools # for netstat, etc.
apt install nmap

# centos
yum install bind-utils # for nslookup, etc.
yum install nmap # for ncat, etc.