Can't install any packages on Amazon Linux 2 instance

Question

I have launched an ec2(Amazon Linux 2) but I am not able to install any packages. Below errors and instructions, I am getting every time. The image is attached.![Enter image description here](https://repost.aws/media/postImages/original/IM1jSEyvbYQRag5x_05rUiNQ)

**One of the configured repositories failed (Unknown),**
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

1. Contact the upstream for the repository and get them to fix the problem.

2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

3. Run the command with the repository temporarily disabled
            yum --disablerepo= ...

4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

yum-config-manager --disable 
        or
            subscription-manager repos --disable=

5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

yum-config-manager --save --setopt=.skip_if_unavailable=true

Gabriel Bartholomeu · Answer

Hi rePost-User-5598008, could you update your post with more network information?

From the first couple lines we can see your server received a time out in port 443.

Is your instance connected to the internet? If not, do you mind trying [AWS Knowledge Center - EC2 Update YUM without internet](https://aws.amazon.com/premiumsupport/knowledge-center/ec2-al1-al2-update-yum-without-internet/) ?

Have you checked the Security Groups rules for this specific instance?

Can you reach any other endpoint?  
  * telnet amazonlinux-2-repos-ap-south-1.s3.dualstack.ap-south-1.amazonaws.com 443 (should show Connected)
  * telnet amazon.com 443( should show Connected)

Rob_H · Answer

Hello @prabal_surya

We answered your question in the latest episode of AWS Supports You. Please take a look at the YouTube video here, and we hope it helps answer your question! https://www.youtube.com/watch?v=lzadlmq4LcM

Please don't hesitate to comment here if you have any follow up questions. If this helped to answer your question, please make sure to mark this question as answered.

Have a great day!

Can't install any packages on Amazon Linux 2 instance

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