Cannot update dietpi anymore (raspberry pi 2)

Troubleshooting
1

Hi,
Every time I try to update my raspberry via dietpi-update, I get the following error:

curl: (6) Could not resolve host: github.com
 [Failed] Download failed, unable to run update. Please try running dietpi-update again.

After each try, I have to reset the network connexion from dietpi-config (Restart Networking), otherwise I have no connexion (I can’t ping google.com).
Any idea what can be the cause of this problem?

ifconfig before update

eth0      Link encap:Ethernet  HWaddr b8:27:eb:14:5a:5f
          inet addr:192.168.1.30  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::ba27:ebff:fe14:5a5f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:388656 errors:0 dropped:205 overruns:0 frame:0
          TX packets:457522 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:41936426 (39.9 MiB)  TX bytes:272719862 (260.0 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:45003 errors:0 dropped:0 overruns:0 frame:0
          TX packets:45003 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:3666166 (3.4 MiB)  TX bytes:3666166 (3.4 MiB)

tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:10.8.0.1  P-t-P:10.8.0.2  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:0 (0.0 B)  TX bytes:1642 (1.6 KiB)

ifconfig after update

eth0      Link encap:Ethernet  HWaddr b8:27:eb:14:5a:5f
          inet addr:192.168.1.30  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::ba27:ebff:fe14:5a5f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:387300 errors:0 dropped:204 overruns:0 frame:0
          TX packets:455799 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:41718787 (39.7 MiB)  TX bytes:272471204 (259.8 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:44870 errors:0 dropped:0 overruns:0 frame:0
          TX packets:44870 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:3655113 (3.4 MiB)  TX bytes:3655113 (3.4 MiB)
2

Hi,

Not sure, but lets try disabling IPv6 and see if the route is available, please run the following commands (you can copy and paste all into terminal):

echo -e "blacklist ipv6" > /etc/modprobe.d/blacklist-ipv6.conf
sed -i "/net.ipv6.conf.all.disable_ipv6 /c\net.ipv6.conf.all.disable_ipv6 = 1" /etc/sysctl.conf
sed -i "/net.ipv6.conf.default.disable_ipv6 /c\net.ipv6.conf.default.disable_ipv6 = 1" /etc/sysctl.conf
sed -i "/net.ipv6.conf.lo.disable_ipv6 /c\net.ipv6.conf.lo.disable_ipv6 = 1" /etc/sysctl.conf

reboot

Afterwards, try running dietpi-update again and see if the result changes. If not, you can enable IPv6 by running:

rm /etc/modprobe.d/blacklist-ipv6.conf &> /dev/null
sed -i "/net.ipv6.conf.all.disable_ipv6 /c\net.ipv6.conf.all.disable_ipv6 = 0" /etc/sysctl.conf
sed -i "/net.ipv6.conf.default.disable_ipv6 /c\net.ipv6.conf.default.disable_ipv6 = 0" /etc/sysctl.conf
sed -i "/net.ipv6.conf.lo.disable_ipv6 /c\net.ipv6.conf.lo.disable_ipv6 = 0" /etc/sysctl.conf
reboot
3

Hi,
I fixed it by switching to DHCP instead of static in network preferences.