/usr/lib/mysql-testsuite/std_data/server-key-sha512.pem is in mysql-testsuite-5.6 5.6.16-1~exp1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | -----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
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