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Every Linux machine knows when you last changed your password, too. $ passwd --status

• emmelaich 10y ago
  Only root can do that.
  • Dylan16807 10y ago
    I'm not sure why that would matter, but that's not true. No sudo needed to look up that I set my password on this VM on 2013-10-08.
    • emmelaich 10y ago
      That was a direct copy'n'paste from a session on centos7. Password age is kept in /etc/shadow, not /etc/passwd. So the passwd command is (needs to be) setuid. Redhat generally limits what setuid programs can do. Probably sensible.