HOWTO : Install MicroCode in Ubuntu Linux

Linux can update microcode to fix Meltdown and Spectre vulnerabilities instead of BIOS update. Ubuntu can fix the vulnerabilities with just one command.

sudo apt update
sudo apt dist-upgrade

For Intel CPU :

sudo apt install intel-microcode

For AMD CPU :

sudo apt install amd64-microcode

After that, reboot your Ubuntu box.

That's all! See you.


Update on JAN 24, 2018

Since Linux creator Linus Torvalds disagrees to install Intel's patches for Spectre, the Intel microcode is patched back to the previous version. You are not required to uninstall it. You just update and it will patch it back to the previous version. Please see The Hacker News for details.

sudo apt update
sudo apt dist-upgrade