curl 6 Could not resolve host google com Name or service not known

Question

when I try to load a web page to terminal it gives curl   6  Could not resolve host error    I have internet in my PC and trying from my home internet connection  So as I there is no any proxy involve here     root localhost kevin   curl http   google com curl   6  Could not resolve host  google com  Name or service not known   clean all and tried again but no lucky    But if I use IP instead of the domain name  it works fine     root localhost kevin   curl http   173 194 46 0  any clue please

User · Accepted Answer

Issues were    IPV6 enabled Wrong DNS server    Here is how I fixed it   IPV6 Disabling   Open Terminal Type su and enter to log in as the super user Enter the root password Type cd  etc modprobe d  to change directory to  etc modprobe d  Type vi disableipv6 conf to create a new file there Press Esc   i to insert data to file Type install ipv6  bin true on the file to avoid loading IPV6 related modules Type Esc     and then wq for save and exit Type reboot to restart fedora After reboot open terminal and type lsmod   grep ipv6 If no result  it means you properly disabled IPV6   Add Google DNS server   Open Terminal Type su and enter to log in as the super user Enter the root password Type cat  etc resolv conf to check what DNS server your Fedora using  Mostly this will be your Modem IP address  Now we have to Find a powerful DNS server  Luckily there is a open DNS server maintain by  Google  Go to this page and find out what are the  Google Public DNS IP addresses  Today those are 8 8 8 8 and 8 8 4 4  But in future those may change  Type vi  etc resolv conf to edit the resolv conf file Press Esc   i for insert data to file Comment all the things in the file by inserting   at the begin of the each line  Do not   delete anything because can be useful in future  Type below two lines in the file  nameserver 8 8 8 8 nameserver 8 8 4 4  -Type Esc     and then wq for save and exit Now you are done and everything works fine  Not necessary to restart   But every time when you restart the computer your   etc resolv conf will be replaced by default  So I ll let you find a way to avoid that     Here is my blog post about this  http   codeketchup blogspot sg 2014 07 how-to-fix-curl-6-could-not-resolve html

User · Answer

Try nslookup google com to determine if there s a DNS issue   192 168 1 254 is your local network address and it looks like your system is using it as a DNS server  Is this your gateway modem router as well   What happens when you try ping google com  Can you browse to it on a Internet web browser

User · Answer

I have today similar problem  But weirder    host - works host pl archive ubuntu com dig - works on default and on all other DNS s dig pl archive ubuntu com  dig  127 0 1 1 pl archive ubuntu com curl - doesn t work  but for some addresses it does  WEIRD  Same in Ruby  APT and many more      curl -v http   google com      Trying 172 217 18 78      Connected to google com  172 217 18 78  port 80   0   gt  GET   HTTP 1 1  gt  Host  google com  gt  User-Agent  curl 7 47 0  gt  Accept       gt   lt  HTTP 1 1 302 Found  lt  Cache-Control  private  lt  Content-Type  text html  charset UTF-8  lt  Referrer-Policy  no-referrer  lt  Location  http   www google pl  gfe rd cr ei pt9UWfqXL4uBX W5n8gB  lt  Content-Length  256  lt  Date  Thu  29 Jun 2017 11 08 22 GMT  lt   lt HTML gt  lt HEAD gt  lt meta http-equiv  content-type  content  text html charset utf-8  gt   lt TITLE gt 302 Moved lt  TITLE gt  lt  HEAD gt  lt BODY gt   lt H1 gt 302 Moved lt  H1 gt  The document has moved  lt A HREF  http   www google pl  gfe rd cr amp ei pt9UWfqXL4uBX W5n8gB  gt here lt  A gt    lt  BODY gt  lt  HTML gt    Connection  0 to host google com left intact    curl -v http   pl archive ubuntu com    Could not resolve host  pl archive ubuntu com   Closing connection 0 curl   6  Could not resolve host  pl archive ubuntu com   Revelation  Eventually I used strace on curl and found that it was connection to nscd deamon   connect 4   sa family AF LOCAL  sun path   var run nscd socket    110    0   Solution  I ve restarted the nscd service  Name Service Cache Daemon  and it helped to solve this issue   systemctl restart nscd service

User · Answer

Perhaps you have some very weird and restrictive SELinux rules in place   If not  try strace -o  tmp wtf -fF curl -v google com and try to spot from  tmp wtf output file what s going on

[linux] curl: (6) Could not resolve host: google.com; Name or service not known

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