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    This is insecure because any user could view the password - either directly via /proc/$pid/cmdline or via the ps command. It's true that mysql overwrites the password in argv during startup but there is always a time window where another user could observe the password. Also, on some systems the argv overwriting might not work. Commented Jul 14, 2019 at 14:49
  • Thanks for the hint that there must not be any blank space after the option letter. Saved my day. Commented Oct 7, 2020 at 8:11
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    Of course this is insecure, but most people are doing something like this in a build process that will be deleted shortly afterwards... Commented Jun 29, 2021 at 22:41
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    List of running processes might be captured by machine monitoring tools and appear then in log files. A short running process is a bad excuse. Commented Sep 23, 2022 at 8:55
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    Just be a 'real person' and enter the password when prompted rather than sharing it with anyone, including your mother. Commented Mar 9, 2024 at 17:09