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https://unix.stackexchange.com/questions/106008/day-of-week-0-7-in-crontab-has-8-options-but-we-have-only-7-days-in-a-week
您即将离开知乎,请注意您的帐号和财产安全。
https://unix.stackexchange.com/questions/106008/day-of-week-0-7-in-crontab-has-8-options-but-we-have-only-7-days-in-a-week