Try this and see if it works:

After that, try running yast again...

W e coming closer.
henk@linux-at4l:~> sudo ln -s /usr/bin/ruby /usr/bin/ruby.ruby2.5
ln: failed to create symbolic link '/usr/bin/ruby.ruby2.5': File exists
henk@linux-at4l:~>

Interesting; so you can't create a symbolic link as the error states "File exists", but in post #15, when you did ls command, that did not show the file??

Can you try this again?

ls -ltrha /usr/bin/ruby.ruby2.5

ls -ltrha /usr/bin/rub*

here is the response
henk@linux-at4l:~> ls -ltrha /usr/bin/ruby.ruby2.5
lrwxrwxrwx 1 root root 13 May 28 19:24 /usr/bin/ruby.ruby2.5 -> /usr/bin/ruby
henk@linux-at4l:~> ls -ltrha /usr/bin/rub*
-rwxr-xr-x 1 root root 167 Feb 21 2018 /usr/bin/ruby-find-versioned
-rwxr-xr-x 1 root root 6.2K May 14 2018 /usr/bin/ruby
lrwxrwxrwx 1 root root 13 May 28 19:24 /usr/bin/ruby.ruby2.5 -> /usr/bin/ruby
henk@linux-at4l:~>

Possibly there is a corrupt file. You could try force reinstalling ruby-related packages, thus:

1 members found this post helpful.

tried 4 times but no result
linux-at4l:/home/henk # zypper in -f libruby2_5 libstorage-ng-ruby ruby ruby-common ruby2.5 ruby2.5-rubygem-abstract_method ruby2.5-rubygem-cfa ruby2.5-rubygem-cheetah ruby2.5-rubygem-fast_gettext ruby2.5-rubygem-gem2rpm ruby2.5-rubygem-ruby-augeas ruby2.5-rubygem-ruby-dbus ruby2.5-rubygem-simpleidn ruby2.5-stdlib yast2-ruby-binding
Timeout exceeded when accessing 'https://download.nvidia.com/opensuse/leap/15.0/media.1/media'.
Abort, retry, ignore? [a/r/i] (r):
Autoselecting 'r' after 21 seconds.
Timeout exceeded when accessing 'https://download.nvidia.com/opensuse/leap/15.0/media.1/media'.
Abort, retry, ignore? [a/r/i] (r):
Autoselecting 'r' after 8 seconds.
Timeout exceeded when accessing 'https://download.nvidia.com/opensuse/leap/15.0/media.1/media'.
Abort, retry, ignore? [a/r/i] (r):
Trying again...
Timeout exceeded when accessing 'https://download.nvidia.com/opensuse/leap/15.0/media.1/media'.
Abort, retry, ignore? [a/r/i] (a):
Trying again...
ABORT request: Aborting requested by user
linux-at4l:/home/henk # n

Disable the NVidia repo (zypper mr -d reponame) and try again. Those messages are all due to an nvidia.com problem that shouldn't have anything to do with ruby2.5.

1 members found this post helpful.

Please be complete, which reponame to use, or what do I have to remove

What's the actual name of the repo to be disabled?Take the name that includes the string idia, and substitute it in the command I previously provided:Alternatively, navigate to /etc/zypp/repos.d/, find the file that includes the string idia, and either delete it, or change its name to not end in .repo, or edit its content to include enabled=0 instead of enabled=1.

1 members found this post helpful.

I see a number of files marked no enabled, but no file with or else the word idea. In /etc/zypp/repos.d also the word idea was not find.

linux-at4l:/home/henk # zypper lr
Repository priorities are without effect. All enabled repositories share the same priority.

# | Alias | Name | Enabled | GPG Check | Refresh
---+-------------------------------------+-----------------------------------------+---------+-----------+--------
1 | download.nvidia.com-leap | nVidia Graphics Drivers | Yes | (r ) Yes | Yes
2 | download.opensuse.org-non-oss | Main Repository (NON-OSS) | Yes | (r ) Yes | Yes
3 | download.opensuse.org-non-oss_1 | Update Repository (Non-Oss) | Yes | (r ) Yes | Yes
4 | download.opensuse.org-oss | Main Repository (OSS) | Yes | (r ) Yes | Yes
5 | download.opensuse.org-oss_1 | Main Update Repository | Yes | (r ) Yes | Yes
6 | http-download.opensuse.org-d6c11ffd | home:dl8fcl:sdr | Yes | (r ) Yes | Yes
7 | openSUSE-Leap-15.0-1 | openSUSE-Leap-15.0-1 | Yes | (r ) Yes | Yes
8 | opensuse-guide.org-repo | Libdvdcss Repository | Yes | (r ) Yes | Yes
9 | packman.inode.at-suse | Packman Repository | Yes | (r ) Yes | Yes
10 | repo-debug | openSUSE-Leap-15.0-Debug | No | ---- | ----
11 | repo-debug-non-oss | openSUSE-Leap-15.0-Debug-Non-Oss | No | ---- | ----
12 | repo-debug-update | openSUSE-Leap-15.0-Update-Debug | No | ---- | ----
13 | repo-debug-update-non-oss | openSUSE-Leap-15.0-Update-Debug-Non-Oss | No | ---- | ----
14 | repo-source | openSUSE-Leap-15.0-Source | No | ---- | ----
15 | repo-source-non-oss | openSUSE-Leap-15.0-Source-Non-Oss | No | ---- | ----
linux-at4l:/home/henk # sudo zypper in -f libruby2_5 libstor
Timeout exceeded when accessing 'https://download.nvidia.com/opensuse/leap/15.0/media.1/media'.
Abort, retry, ignore? [a/r/i] (r):
T

Its oo.17 am local time, I'm going to sleep

Try this:If no material errors result, repeat the comment #20 instruction.

2 members found this post helpful.