Check version of running Oracle linux

[root@d5382f5ba7f4 /]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.2 (Maipo)
[root@d5382f5ba7f4 /]#
[root@d5382f5ba7f4 /]#  cat /etc/oracle-release
Oracle Linux Server release 7.2
[root@d5382f5ba7f4 /]#
[root@d5382f5ba7f4 /]# cat /etc/enterprise-release
cat: /etc/enterprise-release: No such file or directory
[root@d5382f5ba7f4 /]#

And show which RPM package a file belong to?

[root@d5382f5ba7f4 /]# rpm -qf /etc/redhat-release
oraclelinux-release-7.2-1.0.5.el7.x86_64
[root@d5382f5ba7f4 /]#
[root@d5382f5ba7f4 /]# rpm -qf /etc/oracle-release
oraclelinux-release-7.2-1.0.5.el7.x86_64
[root@d5382f5ba7f4 /]#
[root@d5382f5ba7f4 /]#