ubuntu:
1. lsb_release -a
2. cat /etc/issue
3. cat /etc/os-release
4. hostnamectl

centos:
1. cat /etc/redhat-release
![]()
2. cat /etc/os-release

3. hostnamectl

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

1. cat /etc/redhat-release
![]()
2. cat /etc/os-release

3. hostnamectl


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