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