15:58:45 wslab03 < / > ---# apt update Get:1 file:/mnt/.auto/install/repo xenial InRelease [3933 B] Err:2 http://ftp-stud.hs-esslingen.de/pub/Mirrors/ubuntu xenial InRelease Temporary failure resolving 'ftp-stud.hs-esslingen.de' Err:3 http://ftp-stud.hs-esslingen.de/pub/Mirrors/ubuntu xenial-updates InRelease Temporary failure resolving 'ftp-stud.hs-esslingen.de' Err:4 http://ftp-stud.hs-esslingen.de/pub/Mirrors/ubuntu xenial-security InRelease Temporary failure resolving 'ftp-stud.hs-esslingen.de' Err:5 http://ftp-stud.hs-esslingen.de/pub/Mirrors/ubuntu xenial-backports InRelease Temporary failure resolving 'ftp-stud.hs-esslingen.de' Err:6 http://archive.canonical.com xenial InRelease Temporary failure resolving 'archive.canonical.com' Get:1 file:/mnt/.auto/install/repo xenial InRelease [3933 B] Reading package lists... Done Building dependency tree... Done All packages are up to date. W: Failed to fetch http://ftp-stud.hs-esslingen.de/pub/Mirrors/ubuntu/dists/xenial/InRelease Temporary failure resolving 'ftp-stud.hs-esslingen.de' W: Failed to fetch http://ftp-stud.hs-esslingen.de/pub/Mirrors/ubuntu/dists/xenial-updates/InRelease Temporary failure resolving 'ftp-stud.hs-esslingen.de' W: Failed to fetch http://ftp-stud.hs-esslingen.de/pub/Mirrors/ubuntu/dists/xenial-security/InRelease Temporary failure resolving 'ftp-stud.hs-esslingen.de' W: Failed to fetch http://ftp-stud.hs-esslingen.de/pub/Mirrors/ubuntu/dists/xenial-backports/InRelease Temporary failure resolving 'ftp-stud.hs-esslingen.de' W: Failed to fetch http://archive.canonical.com/dists/xenial/InRelease Temporary failure resolving 'archive.canonical.com' W: Some index files failed to download. They have been ignored, or old ones used instead. 15:58:47 wslab03 < / > ---# ping ftp-stud.hs-esslingen.de PING rhlx01.hs-esslingen.de (129.143.116.10) 56(84) bytes of data. 64 bytes from rhlx01.hs-esslingen.de (129.143.116.10): icmp_seq=1 ttl=56 time=2.38 ms 64 bytes from rhlx01.hs-esslingen.de (129.143.116.10): icmp_seq=2 ttl=56 time=2.43 ms ^C --- rhlx01.hs-esslingen.de ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1001ms rtt min/avg/max/mdev = 2.387/2.410/2.434/0.054 ms 15:58:53 wslab03 < / > ---# cat /etc/resolv.conf nameserver 134.60.1.111 search informatik.uni-ulm.de 15:58:55 wslab03 < / > ---#