How to check Linux Redhat version command

How to check Redhat version ? What command I need to type? Is it uname or something else?

Run any one of the following command to check RedHat Linux version

  1. cat /etc/redhat-release
  2. cat /etc/os-release
  3. hostnamectl
  4. lsb_release -a

For more info please see my tutorials:
https://www.cyberciti.biz/faq/what-version-of-redhat-linux-am-i-running/
And:
https://www.cyberciti.biz/faq/how-do-i-determine-rhel-version/