如果把 cronjob 寫在 /etc/crontab 下,那要注意格式
# Example of job definition:
# .---------------- minute (0 - 59)
# | .------------- hour (0 - 23)
# | | .---------- day of month (1 - 31)
# | | | .------- month (1 - 12) OR jan,feb,mar,apr ...
# | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# | | | | |
# * * * * * user-name command to be executed
在 "command to be executed" 前面, 要有 user-name...
如果用 crontab -e 的方式, 則不需要 user-name 那個欄位....
# * * * * * command to be executed
# Example of job definition:
# .---------------- minute (0 - 59)
# | .------------- hour (0 - 23)
# | | .---------- day of month (1 - 31)
# | | | .------- month (1 - 12) OR jan,feb,mar,apr ...
# | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# | | | | |
# * * * * * user-name command to be executed
在 "command to be executed" 前面, 要有 user-name...
如果用 crontab -e 的方式, 則不需要 user-name 那個欄位....
# * * * * * command to be executed
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