ifconfig eth0:1 up

but i found out you can also do
ip addr add dev eth0

HOWEVER and this is the gotcha if you use the second variant you CAN’T use ifconfig -a to see that added alias – you need to use ip addr list

Zeigt WLANs

sudo iwlist wlan0 scanning | grep -A 7 Cell

zeigt die IP Adresse:

ip addr show wlan0

zeigt alle Interfaces

ip addr

show routing table

ip route or route

change default geteway

ip route replace default via

nameserver ist in


zeigt die laufenden Verbindungen

netstat -tulpan

ss state established '( dport = :80 )'


sudo nethogs wlan0

Ports testen

nmap -T4 A testo.com