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(This article was first published on <strong><a href="http://blog.revolutionanalytics.com/2018/06/hotfix-for-mro-350-on-linux.html"> Revolutions</a></strong>, and kindly contributed to <a rel="nofollow" href="https://www.r-bloggers.com/">R-bloggers)</a> </div>
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<p>On Monday, we learned about a serious issue with the installer for Microsoft R Open on Linux-based systems. (Thanks to Norbert Preining for <a rel="nofollow" href="https://www.preining.info/blog/2018/06/microsofts-failed-attempt-on-debian-packaging/" target="_blank">reporting the problem</a>.) The issue was that the installation and de-installation scripts would modify the system shell, and did not use the standard practices to create and restore symlinks for system applications.</p>
<p>The Microsoft R team <a rel="nofollow" href="https://social.msdn.microsoft.com/Forums/en-US/6b51afe3-72b4-47a4-ab72-180cf3f2fba2/debianubuntu-packaging-is-badly-hosed-and-dangerous?forum=ropen" target="_blank">developed a solution the problem</a> with the help of some Debian experts at Microsoft, and last night issued a hotfix for Microsoft R Open 3.5.0 which is now <a rel="nofollow" href="https://mran.microsoft.com/download" target="_blank">available for download</a>. With this fix, the MRO installer no longer relinks <code>/bin/sh</code> to <code>/bin/bash</code>, and instead uses <code>dpkg-divert</code> for Debian-based platforms and <code>update-alternatives</code> for RPM-based platforms. We will also request a discussion with the Debian maintainers of R to further review our installation process. Finally, with the next release — MRO 3.5.1, scheduled for August 9 — we will also include the setup code (including the installation scripts) in the <a rel="nofollow" href="https://github.com/Microsoft/microsoft-r-open/tree/public" target="_blank">MRO GitHub repository</a> for everybody to inspect and give feedback on. </p>
<p>You can find more details about the issue, the how it was resolved, and the processes we have put in place to make sure it doesn’t happen again in the <a rel="nofollow" href="https://blogs.msdn.microsoft.com/mlserver/2018/06/13/how-we-are-fixing-our-installer-for-microsoft-r-open-on-linux/" target="_blank">blog post</a> linked below.</p>
<p>Microsoft Machine Learning Server blog: <a rel="nofollow" href="https://blogs.msdn.microsoft.com/mlserver/2018/06/13/how-we-are-fixing-our-installer-for-microsoft-r-open-on-linux/" target="_blank">How we are fixing our installer for Microsoft R Open on Linux</a></p>
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