How can I refresh resolv.conf after changing the resolv options in the interfaces file?











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After bringing up a dhcp controlled instance in AWS I have made changes to the /etc/network/interfaces file for custom nameserver and DNS search strings:



auto lo

auto eth0

iface lo inet loopback

dns-nameservers 1.1.1.1 9.9.9.9

dns-search flapjacks.io flapjacks.net



iface eth0 inet dhcp


I was hoping to be able to restart a service to get resolv.conf to reflect these changes, but I do not know the service to restart... the changes do show up after reboot however. Does anyone know what service should update this?






networking server dns resolv.conf







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    up vote
    0
    down vote

    favorite












    After bringing up a dhcp controlled instance in AWS I have made changes to the /etc/network/interfaces file for custom nameserver and DNS search strings:



    auto lo
    
auto eth0
    
iface lo inet loopback
    
dns-nameservers 1.1.1.1 9.9.9.9
    
dns-search flapjacks.io flapjacks.net
    

    
iface eth0 inet dhcp


    I was hoping to be able to restart a service to get resolv.conf to reflect these changes, but I do not know the service to restart... the changes do show up after reboot however. Does anyone know what service should update this?






    networking server dns resolv.conf







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      After bringing up a dhcp controlled instance in AWS I have made changes to the /etc/network/interfaces file for custom nameserver and DNS search strings:



      auto lo
      
auto eth0
      
iface lo inet loopback
      
dns-nameservers 1.1.1.1 9.9.9.9
      
dns-search flapjacks.io flapjacks.net
      

      
iface eth0 inet dhcp


      I was hoping to be able to restart a service to get resolv.conf to reflect these changes, but I do not know the service to restart... the changes do show up after reboot however. Does anyone know what service should update this?






      networking server dns resolv.conf







      share|improve this question













      After bringing up a dhcp controlled instance in AWS I have made changes to the /etc/network/interfaces file for custom nameserver and DNS search strings:



      auto lo
      
auto eth0
      
iface lo inet loopback
      
dns-nameservers 1.1.1.1 9.9.9.9
      
dns-search flapjacks.io flapjacks.net
      

      
iface eth0 inet dhcp


      I was hoping to be able to restart a service to get resolv.conf to reflect these changes, but I do not know the service to restart... the changes do show up after reboot however. Does anyone know what service should update this?






      networking server dns resolv.conf




      networking server dns resolv.conf






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked yesterday









      Thaidog

      83




      83






















          1 Answer
          1






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          up vote
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          I suggest that you try:



          sudo ifdown eth0 && sudo ifup -v eth0


          The -v for verbose should produce sufficient outptut to see that the process completed successfully.






          share|improve this answer





















          • Didn't work. Looks to have restarted DHCP + ifup and ifdown but the resolv.conf has not been updated.
            – Thaidog
            yesterday










          • Does resolv.conf contain 127.0.0.xx suggesting that dnsmasq is running? What does this report? sudo systemd-resolve --status It should show the DNS naeservers to be used in absence of a cached lookup previously supplied by dnsmasq. I doubt that you really want to bypass or disable dnsmasq.
            – chili555
            yesterday










          • dnsmasq is not installed / running - and your command does not appear valid: "systemd-resolve: unrecognized option '--status'"
            – Thaidog
            yesterday










          • I'm not sure what all you did to remove dnsmasq. Is systed running? ps aux | grep systemd Which version are you running? lsb-release -d and also: uname -r
            – chili555
            yesterday










          • This is 16.04 LTS server - 4.4.0-131-generic - why would i need dnsmasq?
            – Thaidog
            14 hours ago











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          up vote
          0
          down vote













          I suggest that you try:



          sudo ifdown eth0 && sudo ifup -v eth0


          The -v for verbose should produce sufficient outptut to see that the process completed successfully.






          share|improve this answer





















          • Didn't work. Looks to have restarted DHCP + ifup and ifdown but the resolv.conf has not been updated.
            – Thaidog
            yesterday










          • Does resolv.conf contain 127.0.0.xx suggesting that dnsmasq is running? What does this report? sudo systemd-resolve --status It should show the DNS naeservers to be used in absence of a cached lookup previously supplied by dnsmasq. I doubt that you really want to bypass or disable dnsmasq.
            – chili555
            yesterday










          • dnsmasq is not installed / running - and your command does not appear valid: "systemd-resolve: unrecognized option '--status'"
            – Thaidog
            yesterday










          • I'm not sure what all you did to remove dnsmasq. Is systed running? ps aux | grep systemd Which version are you running? lsb-release -d and also: uname -r
            – chili555
            yesterday










          • This is 16.04 LTS server - 4.4.0-131-generic - why would i need dnsmasq?
            – Thaidog
            14 hours ago















          up vote
          0
          down vote













          I suggest that you try:



          sudo ifdown eth0 && sudo ifup -v eth0


          The -v for verbose should produce sufficient outptut to see that the process completed successfully.






          share|improve this answer





















          • Didn't work. Looks to have restarted DHCP + ifup and ifdown but the resolv.conf has not been updated.
            – Thaidog
            yesterday










          • Does resolv.conf contain 127.0.0.xx suggesting that dnsmasq is running? What does this report? sudo systemd-resolve --status It should show the DNS naeservers to be used in absence of a cached lookup previously supplied by dnsmasq. I doubt that you really want to bypass or disable dnsmasq.
            – chili555
            yesterday










          • dnsmasq is not installed / running - and your command does not appear valid: "systemd-resolve: unrecognized option '--status'"
            – Thaidog
            yesterday










          • I'm not sure what all you did to remove dnsmasq. Is systed running? ps aux | grep systemd Which version are you running? lsb-release -d and also: uname -r
            – chili555
            yesterday










          • This is 16.04 LTS server - 4.4.0-131-generic - why would i need dnsmasq?
            – Thaidog
            14 hours ago













          up vote
          0
          down vote










          up vote
          0
          down vote









          I suggest that you try:



          sudo ifdown eth0 && sudo ifup -v eth0


          The -v for verbose should produce sufficient outptut to see that the process completed successfully.






          share|improve this answer












          I suggest that you try:



          sudo ifdown eth0 && sudo ifup -v eth0


          The -v for verbose should produce sufficient outptut to see that the process completed successfully.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered yesterday









          chili555

          37.5k54976




          37.5k54976












          • Didn't work. Looks to have restarted DHCP + ifup and ifdown but the resolv.conf has not been updated.
            – Thaidog
            yesterday










          • Does resolv.conf contain 127.0.0.xx suggesting that dnsmasq is running? What does this report? sudo systemd-resolve --status It should show the DNS naeservers to be used in absence of a cached lookup previously supplied by dnsmasq. I doubt that you really want to bypass or disable dnsmasq.
            – chili555
            yesterday










          • dnsmasq is not installed / running - and your command does not appear valid: "systemd-resolve: unrecognized option '--status'"
            – Thaidog
            yesterday










          • I'm not sure what all you did to remove dnsmasq. Is systed running? ps aux | grep systemd Which version are you running? lsb-release -d and also: uname -r
            – chili555
            yesterday










          • This is 16.04 LTS server - 4.4.0-131-generic - why would i need dnsmasq?
            – Thaidog
            14 hours ago


















          • Didn't work. Looks to have restarted DHCP + ifup and ifdown but the resolv.conf has not been updated.
            – Thaidog
            yesterday










          • Does resolv.conf contain 127.0.0.xx suggesting that dnsmasq is running? What does this report? sudo systemd-resolve --status It should show the DNS naeservers to be used in absence of a cached lookup previously supplied by dnsmasq. I doubt that you really want to bypass or disable dnsmasq.
            – chili555
            yesterday










          • dnsmasq is not installed / running - and your command does not appear valid: "systemd-resolve: unrecognized option '--status'"
            – Thaidog
            yesterday










          • I'm not sure what all you did to remove dnsmasq. Is systed running? ps aux | grep systemd Which version are you running? lsb-release -d and also: uname -r
            – chili555
            yesterday










          • This is 16.04 LTS server - 4.4.0-131-generic - why would i need dnsmasq?
            – Thaidog
            14 hours ago
















          Didn't work. Looks to have restarted DHCP + ifup and ifdown but the resolv.conf has not been updated.
          – Thaidog
          yesterday




          Didn't work. Looks to have restarted DHCP + ifup and ifdown but the resolv.conf has not been updated.
          – Thaidog
          yesterday












          Does resolv.conf contain 127.0.0.xx suggesting that dnsmasq is running? What does this report? sudo systemd-resolve --status It should show the DNS naeservers to be used in absence of a cached lookup previously supplied by dnsmasq. I doubt that you really want to bypass or disable dnsmasq.
          – chili555
          yesterday




          Does resolv.conf contain 127.0.0.xx suggesting that dnsmasq is running? What does this report? sudo systemd-resolve --status It should show the DNS naeservers to be used in absence of a cached lookup previously supplied by dnsmasq. I doubt that you really want to bypass or disable dnsmasq.
          – chili555
          yesterday












          dnsmasq is not installed / running - and your command does not appear valid: "systemd-resolve: unrecognized option '--status'"
          – Thaidog
          yesterday




          dnsmasq is not installed / running - and your command does not appear valid: "systemd-resolve: unrecognized option '--status'"
          – Thaidog
          yesterday












          I'm not sure what all you did to remove dnsmasq. Is systed running? ps aux | grep systemd Which version are you running? lsb-release -d and also: uname -r
          – chili555
          yesterday




          I'm not sure what all you did to remove dnsmasq. Is systed running? ps aux | grep systemd Which version are you running? lsb-release -d and also: uname -r
          – chili555
          yesterday












          This is 16.04 LTS server - 4.4.0-131-generic - why would i need dnsmasq?
          – Thaidog
          14 hours ago




          This is 16.04 LTS server - 4.4.0-131-generic - why would i need dnsmasq?
          – Thaidog
          14 hours ago


















           

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