/etc/issue
$ cat /etc/issue
Amazon Linux AMI release 2015.09
Kernel \r on an \m
/etc/system-release
$ cat /etc/system-release
Amazon Linux AMI release 2015.09
/etc/issue
$ cat /etc/issue
Amazon Linux AMI release 2015.09
Kernel \r on an \m
/etc/system-release
$ cat /etc/system-release
Amazon Linux AMI release 2015.09