IT-Wissen/linux/linux-netzwerk.md

Table of Contents

• Linux Netzwerk
• Interface
• Get hostname
• Get public IP address
• Network configuration with nmcli
• Show available wifi
• show network interfaces on computer
• show interface information

Linux Netzwerk

Interface

Jedes Interface hat einen eigenen Namen welches konfiguriert werden muss

• en*: Physisches Ethernet Interface
• wl*: Physisches WLAN Interface
• ww*: Physiche WWAN Interace (Cellphone Card, Network Address)
• eth*: Virtuelles Interface (VMs, Cloud Instanzen)
• vir*: VirtualBox

route shows used Interface.

Get hostname

hostname

Get public IP address

IPv4:

dig TXT +short o-o.myaddr.l.google.com @ns1.google.com
or
host myip.opendns.com resolver1.opendns.com

IPv6:

dig -6 TXT +short o-o.myaddr.l.google.com @ns1.google.com

Network configuration with nmcli

Show available wifi

nmcli device wifi list

show network interfaces on computer

ip link show
or 
nmcli device

show interface information

Shows table with local IP, Gateway IP, DNS IP, network name etc.

nmcli con show

NAME    UUID                                  TYPE  DEVICE 
RR_Net  9a0bf331-2197-478e-aaef-8bdb0da7daef  wifi  wlp1s0

nmcli dev show

For hardware info:

lshw -C network