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I write the image on my microSD card and boot, and "sudo apt-get update". "Temporary failure resolving - port.ubuntu.com" Can't update. How to solve this issue?

I downloaded the image from this link. https://wiki.ubuntu.com/ARM/RaspberryPi#Ubuntu_arm64.2FAArch64 I wrote the image by Win32DiskImager.

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    Does adding nameserver 8.8.8.8 (Google's DNS server) to a new line on /etc/resolv.conf have any effect? It could be a DNS issue, but it's difficult to tell at this stage.
    – Aurora0001
    Jan 6 '18 at 14:15
  • As the issue includes temporary waiting may solve it.
    – Steve Robillard
    Jan 6 '18 at 15:21
  • Thank you very much to Mr/Ms Aurora0001 & Steve Robillard. After wrote this question, I unintentionally tried Raspbian os and everything gone be alright. So, I'll try your advise someday with super great thanksfullness. Hope your nice advices help future me or others.
    – shshsh12
    Jan 7 '18 at 11:23
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This is very late reply, hopefully you have already solve this issue

I encounter a similar issue when I tried to boot Ubuntu 20.04 LTS on raspberry pi using a microSD card, turns out the cause is that it is not connected to the internet. I connected it to the internet through an Ethernet cable and the error is gone.

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