The script must be run as root user. You can view the source code here. Use the wget command or curl command to grab the source code on your Linux box:

$ cd /tmp/
$ wget


$ git clone

How to check Linux for Spectre and Meltdown vulnerability

Run the script as root user using sudo command or su command:

$ sudo sh

Another output from my CentOS 7.x server where Meltdown/Spectre v1 was patched with Kernel:

$ sudo sh


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