apt install krb5-user;# fails on Ubuntu18.04

I have done these other steps and still see the error reported above:
  root@mercury-test:~# apt-get update
    Hit:1 http://archive.ubuntu.com/ubuntu bionic InRelease
    Get:2 http://archive.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
    Get:3 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
    Fetched 177 kB in 1s (127 kB/s)
    Reading package lists... Done
  root@mercury-test:~# apt-get upgrade -y
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    Calculating upgrade... Done
    0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  root@mercury-test:~# cat /etc/*-release
    DISTRIB_ID=Ubuntu
    DISTRIB_RELEASE=18.04
    DISTRIB_CODENAME=bionic
    DISTRIB_DESCRIPTION="Ubuntu 18.04.2 LTS"
    NAME="Ubuntu"
    VERSION="18.04.2 LTS (Bionic Beaver)"
    ID=ubuntu
    ID_LIKE=debian
    PRETTY_NAME="Ubuntu 18.04.2 LTS"
    VERSION_ID="18.04"
    HOME_URL="https://www.ubuntu.com/"
    SUPPORT_URL="https://help.ubuntu.com/"
    BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
    PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
    VERSION_CODENAME=bionic
    UBUNTU_CODENAME=bionic

Huh???
Note sure what you are talking about.

It works fine:

doug@serv-dev:~$ sudo apt install krb5-user
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  krb5-config libgssrpc4 libkadm5clnt-mit11 libkadm5srv-mit11 libkdb5-9
Suggested packages:
  krb5-doc
The following NEW packages will be installed:
  krb5-config krb5-user libgssrpc4 libkadm5clnt-mit11 libkadm5srv-mit11 libkdb5-9
0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
Need to get 307 kB of archives.
After this operation, 1,305 kB of additional disk space will be used.
Do you want to continue? [Y/n] n
Abort.

Perhaps check your /etc/apt/sources.list file. Is is the default file? My best guess is that "universe" has been disabled.

You probably don't have universe enabled in sources.list. it's a known bug
in the subiquity installer, I don't have the number at hand as I'm on my
phone.

On Thu, Feb 14, 2019, 00:00 Doug Smythies <<email address hidden> wrote:

> Huh???
> Note sure what you are talking about.
>
> It works fine:
>
> doug@serv-dev:~$ sudo apt install krb5-user
> Reading package lists... Done
> Building dependency tree
> Reading state information... Done
> The following additional packages will be installed:
> krb5-config libgssrpc4 libkadm5clnt-mit11 libkadm5srv-mit11 libkdb5-9
> Suggested packages:
> krb5-doc
> The following NEW packages will be installed:
> krb5-config krb5-user libgssrpc4 libkadm5clnt-mit11 libkadm5srv-mit11
> libkdb5-9
> 0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
> Need to get 307 kB of archives.
> After this operation, 1,305 kB of additional disk space will be used.
> Do you want to continue? [Y/n] n
> Abort.
>
> Perhaps check your /etc/apt/sources.list file. Is is the default file?
> My best guess is that "universe" has been disabled.
>
>
> ** Changed in: serverguide
> Status: New => Invalid
>
> --
> You received this bug notification because you are subscribed to Ubuntu
> Server Guide.
> https://bugs.launchpad.net/bugs/1815825
>
> Title:
> apt install krb5-user;# fails on Ubuntu18.04
>
> Status in Ubuntu Server Guide:
> Invalid
>
> Bug description:
> # apt install krb5-user
> Reading package lists... Done
> Building dependency tree
> Reading state information... Done
> Package krb5-user is not available, but is referred to by another
> package.
> This may mean that the package is missing, has been obsoleted, or
> is only available from another source
>
> E: Package 'krb5-user' has no installation candidate
> #
>
> I need to enable Acitve Directory integration for user authentication in
> a Microsoft active directory domain.
> The instructions on the Ubuntu Server Guide describe installing and
> configuring the krb5-user package. The package appears to have been remove
> from the Ubuntu repo. Is there a replacement package we can use, or can
> someone upload the package to the Ubuntu/Canonical repository?
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/serverguide/+bug/1815825/+subscriptions
>
> Launchpad-Notification-Type: bug
> Launchpad-Bug: product=serverguide; status=Invalid; importance=Undecided;
> assignee=None;
> Launchpad-Bug-Tags: ad sssd
> Launchpad-Bug-Information-Type: Public
> Launchpad-Bug-Private: no
> Launchpad-Bug-Security-Vulnerability: no
> Launchpad-Bug-Commenters: dsmythies rataylor
> Launchpad-Bug-Reporter: Randy Taylor (rataylor)
> Launchpad-Bug-Modifier: Doug Smythies (dsmythies)
> Launchpad-Message-Rationale: Subscriber (Ubuntu Server Guide)
> Launchpad-Message-For: ahasenack
>

If you used the subiquity installer, the related bug that Andreas referred to is bug 1783129.

I am going to assume this was the case and change this bug from invalid to a duplicate of that bug.

Once I found a version of /etc/apt/sources.list that I could get to work I was able to install krb5-user.

   Randy