这是我在Ubuntu中使用sudo crontab -e的crontab文件。前两行不起作用。但所有其他工作顺利进行。我不明白为什么？可能是什么问题？感谢
* * * * * php /var/www/html/bak/autopost/index.php
* * * * * php /var/www/html/bak/autopost/autosubmitimage.php
30 21 * * * php /var/www/html/bak/cron-update-aff-posts.php
30 23 * * * php /var/www/html/bak/cron-update-aff-posts.php
30 01 * * * php /var/www/html/bak/cron-update-aff-posts.php
30 06 * * * php /var/www/html/bak/cron-update-aff-posts.php
30 08 * * * php /var/www/html/bak/cron-update-aff-posts.php
30 10 * * * php /var/www/html/bak/cron-update-aff-posts.php
30 12 * * * php /var/www/html/bak/cron-update-aff-posts.php
31 01 * * * php /var/www/html/affiliates/bak/cron_post_to_wall.php
31 03 * * * php /var/www/html/affiliates/bak/cron_post_to_wall.php
31 05 * * * php /var/www/html/affiliates/bak/cron_post_to_wall.php
31 10 * * * php /var/www/html/affiliates/bak/cron_post_to_wall.php
31 12 * * * php /var/www/html/affiliates/bak/cron_post_to_wall.php
31 14 * * * php /var/www/html/affiliates/bak/cron_post_to_wall.php
31 16 * * * php /var/www/html/affiliates/bak/cron_post_to_wall.php
* * * * * php /var/www/html/images/update.php