Cant enter in https://github.com/ after sudo dnf update

Ask Fedora
1

Hello,
i am new in fedora, today i installed and all work fine, but when i update the system with:
sudo dnf update
i reboot my computer and after that i cant enter in https://github.com/ but all others pages works.

e3b36bbf4e4ba5c66a44de8d32f00ac491bf198d.png
e3b36bbf4e4ba5c66a44de8d32f00ac491bf198d.png1920×1080 72.6 KB

2

Hi, Michel, and welcome to the forum. Sorry to hear you are having this issue.
Since all other sites work, the first thing I’d be checking is to see if github.com is down, as indicated. I’d try curl https://github.com, I’d try ping github.com, I’d try using a different device or browser.
If other devices can access that site but not this Fedora system, then I’d start poking at this system. I’d try nslookup github.com to see if this system knows how to reach it.
Have you tried any of these, and if so, with what results?
When pasting command results in, please use the </> button to ensure the formatting is readable. And for curl output, which if successful will be rather long, just show the first and last few lines, please.

3

Thks to helpme,
i can enter with others pc and phones in the same red.
I tryed with chrome and firefox with fedora but i cant do it after the update of the system.

 imutes@fedora  ~  nslookup github.com
Server:		127.0.0.53
Address:	127.0.0.53#53


 ✘ imutes@fedora  ~  ping github.com
ping: github.com: Name or service not known


 imutes@fedora  ~  curl github.com
curl: (6) Could not resolve host: github.com
4

Interesting. So the issue here is that the system’s DNS lookup of this address fails. Do you have any failed services? systemctl status In particular you should check systemd-resolved. Oh, and is this Fedora 35? Also please show the output of resolvectl status

Have you modified /etc/hosts?

5

Yes, i am using Fedora 35.
I didnt change host.
I only install fedora 35, later install zsh and ho my zsh.
Later sudo dnf update and it break my system.

 imutes@fedora  ~  resolvectl status
Global
       Protocols: LLMNR=resolve -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: stub

Link 2 (enp3s0)
Current Scopes: none
     Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

Link 3 (wlp4s0)
    Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
         Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 192.168.1.254
       DNS Servers: 192.168.1.254


systemctl status


             ├─systemd-resolved.service 
             │ └─850 /usr/lib/systemd/systemd-resolved

and my host file

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
6

Can you resolve github.com by using another DNS resolver. Try:

nslookup github.com 8.8.8.8

Change 8.8.8.8 part to a well-known DNS resolver as you wish.

7

thanks you a lot, works :smiley: