hai
how to find linux os series
Your question makes no sense. Try to restate it in depth.
If by "os series" you mean the name of a particular linux distribution, there is no easy way of definitively doing it. You have to write a shell script that checks for and parses various files in /etc to try and determine the name of the distribution.
The current version is registered in /etc/redhat-release.
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I just saw this was a double post. Please be considerate of our time when asking questions.