Ubuntu

Some problem with apt update on Ubuntu 20.04 LTS server on Raspberry Pi 4 B

Asked by Ngo Dang Khoi on 2020-12-19

I'm trying to run apt update and this is what I get:

Err:1 http://ports.ubuntu.com/ubuntu-ports focal InRelease
    Temporary failure resolving 'ports.ubuntu.com'
Err:2 http://ports.ubuntu.com/ubuntu-ports focal-updates InRealease
    Temporary failure resolving 'ports.ubuntu.com'
Err:3 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease
    Temporary failure resolving 'ports.ubuntu.com'
Err:4 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease
    Temporary failure resolving 'ports.ubuntu.com'
reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/focal/InRealease Temporary failure resolving 'ports.ubuntu.com'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/focal-updates/InRealease Temporary failure resolving 'ports.ubuntu.com'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/focal-backports/InRealease Temporary failure resolving 'ports.ubuntu.com'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/focal-security/InRealease Temporary failure resolving 'ports.ubuntu.com'
W: Some index files failed to download. They have been ignored, or old ones used instead.

I'm a newbie to linux hope you can help me fix this

Question information

Language:: English Edit question

Status:: Answered

For:: Ubuntu Edit question

Assignee:: No assignee Edit question

Last query:: 2020-12-20

Last reply:: 2020-12-20

Link existing bug

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Manfred Hampl (m-hampl) said on 2020-12-19:

The problem seems not to be related to the update, but apparently is caused by a networking problem.

Can you ping internet servers, e.g. 8.8.8.8 or google.com from your Raspberry PI system?
Can you access the internet from your Raspberry PI system, e.g. with a web browser?
Do you use a web proxy?

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Ngo Dang Khoi (khoi0308) said on 2020-12-20:

When I run 'ping 8.8.8.8' it returns 'ping: connect: Network is unreachable' when I run 'ping google.com' it returns 'ping: google.com: Temporary failure in name resolution'
Can I use an ethernet cable to connect from a laptop that is connect to the internet through wifi to the Raspberry Pi?