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Any file created by INTO OUTFILE or INTO DUMPFILE is writable by all users on the server host. The reason for this is that the MySQL server cannot create a file that is owned by anyone other than the user under whose account it is running. (You should never run mysqld as root for this and other reasons.) The file thus must be world-writable so that you can manipulate its contents.

Wed Oct 3 10:01:20 2001 UTC (7 years, 5 months ago) by markus

...

/* check the open file to avoid races */
if (fstat(fileno(f), &st) < 0 ||
(st.st_uid != 0 && st.st_uid != uid) ||
(st.st_mode & 022) != 0) {
snprintf(err, errlen, "bad ownership or modes for file %s",
buf);
return -1;
}

Authentication refused: bad ownership or modes for file /var/lib/mysql/.ssh/authorized_keys