[Ubuntu] 備份crontab

備份當前用戶crontab

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crontab -l > backup.txt
crontab -l > backup.txt
crontab -l > backup.txt

備份其他用戶crontab,如用戶zcg:

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crontab -u zcg -l > backup.txt
crontab -u zcg -l > backup.txt
crontab -u zcg -l > backup.txt

還原當前用戶crontab

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crontab backup.txt
crontab backup.txt
crontab backup.txt

還原指定用戶crontab

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crontab -u zcg backup.txt
crontab -u zcg backup.txt
crontab -u zcg backup.txt