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operating-systems.html: add a warning for Linux/CPU vulns #1231

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Mikaela merged 14 commits from cpu-vulns into master 2019-08-31 17:05:37 +00:00
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@@ -56,7 +56,7 @@ tor="http://sejnfjrq6szgca7v.onion"
<li><code>echo GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT mds=full,nosmt" | sudo tee /etc/default/grub.d/mds.conf</code> to create a new grub config file source with the echoed content</li> <li><code>echo GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT mds=full,nosmt" | sudo tee /etc/default/grub.d/mds.conf</code> to create a new grub config file source with the echoed content</li>
<li><code>sudo grub-mkconfig -o /boot/grub/grub.cfg</code> to generate a new grub config file including this new kernel flag</li> <li><code>sudo grub-mkconfig -o /boot/grub/grub.cfg</code> to generate a new grub config file including this new kernel flag</li>
<li><code>sudo reboot</code> to reboot</li> <li><code>sudo reboot</code> to reboot</li>
Mikaela commented 2019-08-30 10:37:50 +00:00 (Migrated from github.com)
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I think it's more universal than systemctl reboot

I think it's more universal than `systemctl reboot`
<li>afterward the reboot check <code>tail -n +1 /sys/devices/system/cpu/vulnerabilities/*</code> again to see that MDS now says SMT disabled.</li> <li>after the reboot, check <code>tail -n +1 /sys/devices/system/cpu/vulnerabilities/*</code> again to see that MDS now says SMT disabled.</li>
</ol> </ol>
<h5>Further reading</h5> <h5>Further reading</h5>