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I'm having trouble figuring out yum, rpm, and exim4.

All I want to do is 

yum install exim4

yum has been good to me in the past, smoothly fetching all packages and dependencies required to run the program I desire.

But not this time. exim4 wasn't included in the amzn-main package apparently.

amzn-main/latest
amzn-updates/latest
No package exim4 available.

Now I don't want any fish. I want to learn how to use the dadgam yum fishing rod.

  • I don't know where to get the command to install exim4 via yum.
  • I don't know how to expand the places my Linux instance is looking (besides just amzn-main) to actually find the exim4 yum package
    • I don't know whether it is safe to look in other places for packages for my ec2 instance other than amzn-main
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4 Answers 4

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2

Amazon Linux doesn't include exim in its packages at all. Use a different MTA.

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4
  • I see, so postfix or sendmail are options for me, but not exim. Does this mean exim just isn't available for me as a Linux AMI user? That seems a bit oppressive.
    – bobobobo
    Jan 14, 2014 at 23:21
  • Why? Are you attached to exim? In any case, if you have a problem with Amazon's choice of packages to ship, you have to complain to Amazon...
    – Michael Hampton
    Jan 14, 2014 at 23:27
  • Somebody recommended exim -- I suppose they should all be roughly eq. looking at a comparison. I tried installing sendmail and apparently it is already installed on AMI servers.. so that was cool.
    – bobobobo
    Jan 14, 2014 at 23:39
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    Or if you know how to build RPM's, get a recent exim src.rpm and rebuild it. It's not always easy, it depends how much rpm macro customization is done by AMI and/or the src rpm you grabbed. If you have never rebuilt RPM's before, I don't advise it.
    – Todd Lyons
    Jan 15, 2014 at 0:29
2

If you enable the repository EPEL, then you can install exim via yum. Here's are Amazon's instructions:

Modify /etc/yum.repos.d/epel.repo. Under the section marked [epel], change enabled=0 to enabled=1.

To temporarily enable the EPEL 6 repository, use the yum command line option --enablerepo=epel.

Please note that the Amazon Linux AMI repositories are configured with a higher priority than any third-party repositories. The reason for this is because there are several packages that are part of the Amazon Linux AMI that are also in third-party repositories, and we want to make sure that the Amazon Linux AMI version is installed in the default case.

Enabling EPEL is relatively safe, since according to the FAQ "EPEL is purely a complementary add-on repository and does not replace packages in RHEL or layered products."

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  • Warning: EPEL packages are not built or tested for Amazon Linux and may or may not work.
    – Michael Hampton
    Sep 6, 2018 at 21:05
2

These days exim is included, so no need for third party repos. You can simply yum install exim.

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-1

enable this:

sudo yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

https://aws.amazon.com/premiumsupport/knowledge-center/ec2-enable-epel/

Once that is installed, you don't need --enablerepo=epel on each yum command. It's enabled for good.

$ yum list available | grep exim

This shows that you are installing exim 4.90 (latest is 4.91, I don't see that available.)

finally:

$ sudo yum install exim

That's it. ......

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1
  • Warning: EPEL packages are not built or tested for Amazon Linux and may or may not work.
    – Michael Hampton
    Sep 6, 2018 at 21:05

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