How to resolve hostnames in chroot? - Ask Ubuntu


i try repair broken ubunu 14.04 chroot. did, boot ubuntu usb mounted original system has repaired , changed system chroot:

sudo mount /dev/sdxy /mnt  sudo mount -o bind /dev /mnt/dev  sudo mount -o bind /sys /mnt/sys  sudo mount -t proc /proc /mnt/proc  sudo cp /proc/mounts /mnt/etc/mtab  sudo chroot /mnt /bin/bash

that worked fine, in chroot environment don't have access internet, apt isn't able resolve hostnames. supposed do? 

ping www.askubuntu.com

does not work either.

on newer ubuntu systems, name resolution handled resolvconf service, , /etc/resolv.conf symbolic link /run/resolvconf/resolv.conf. can either add bind mount /run filesystem along other bind mounts before executing chroot command

sudo mount -o bind /run /mnt/run

so chroot system picks host system's dns settings or, once you're in chrooted system, temporarily create static /etc/resolv.conf nameserver(s) of choice e.g.

echo 'nameserver 8.8.4.4' | sudo tee -a /etc/resolv.conf

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