Ok also:
nina@nina-Lenovo-G50-45:~$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 127.0.0.53
nina@nina-Lenovo-G50-45:~$ ls -l /etc/resolv.conf
lrwxrwxrwx 1 root root 31 Jun 23 13:08 /etc/resolv.conf -> /var/run/resolvconf/resolv.conf
nina@nina-Lenovo-G50-45:~$ nmcli dev show
GENERAL.DEVICE: wlan0
GENERAL.TYPE: wifi
GENERAL.HWADDR: 38:B1:DB:DC:43:69
GENERAL.MTU: 1500
GENERAL.STATE: 100 (verbunden)
GENERAL.CONNECTION: eduroam
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveCo
IP4.ADDRESS[1]: 134.102.26.63/21
IP4.GATEWAY: 134.102.31.250
IP4.ROUTE[1]: dst = 0.0.0.0/0, nh = 134.102.31.250, mt
IP4.ROUTE[2]: dst = 134.102.24.0/21, nh = 0.0.0.0, mt
IP4.ROUTE[3]: dst = 169.254.0.0/16, nh = 0.0.0.0, mt =
IP4.DNS[1]: 134.102.20.20
IP4.DNS[2]: 134.102.200.14
IP4.DOMAIN[1]: wlan.uni-bremen.de
IP6.ADDRESS[1]: fe80::4e39:3911:152b:47db/64
IP6.GATEWAY: --
IP6.ROUTE[1]: dst = ff00::/8, nh = ::, mt = 256, table
IP6.ROUTE[2]: dst = fe80::/64, nh = ::, mt = 256
IP6.ROUTE[3]: dst = fe80::/64, nh = ::, mt = 600
GENERAL.DEVICE: eth0
GENERAL.TYPE: ethernet
nina@nina-Lenovo-G50-45:~$ ping -c1 213.95.41.4
PING 213.95.41.4 (213.95.41.4) 56(84) bytes of data.
64 bytes from 213.95.41.4: icmp_seq=1 ttl=57 time=18.4 ms
--- 213.95.41.4 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 18.489/18.489/18.489/0.000 ms
nina@nina-Lenovo-G50-45:~$ ping -c1 www.ubuntuusers.de
ping: www.ubuntuusers.de: Der Name oder der Dienst ist nicht bekannt
nina@nina-Lenovo-G50-45:~$ host -v ubuntuusers.de
Trying "ubuntuusers.de"
Host ubuntuusers.de not found: 2(SERVFAIL)
Received 32 bytes from 127.0.0.53#53 in 0 ms
nina@nina-Lenovo-G50-45:~$ host -v ubuntuusers.de 8.8.4.4
Trying "ubuntuusers.de"
Using domain server:
Name: 8.8.4.4
Address: 8.8.4.4#53
Aliases:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38744
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;ubuntuusers.de. IN A
;; ANSWER SECTION:
ubuntuusers.de. 20843 IN A 213.95.41.4
Received 48 bytes from 8.8.4.4#53 in 37 ms
Trying "ubuntuusers.de"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62149
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;ubuntuusers.de. IN AAAA
;; ANSWER SECTION:
ubuntuusers.de. 12774 IN AAAA 2001:780:0:25:dead:beef:cafe:1
Received 60 bytes from 8.8.4.4#53 in 180 ms
Trying "ubuntuusers.de"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51027
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;ubuntuusers.de. IN MX
;; ANSWER SECTION:
ubuntuusers.de. 21599 IN MX 20 mx2.ubuntu-de.org.
ubuntuusers.de. 21599 IN MX 10 mx1.ubuntu-de.org.
Received 85 bytes from 8.8.4.4#53 in 40 ms