Crontab不起作用

这是我在Ubuntu中使用sudocrontab-e的crontab文件。前两行不起作用。但其余的工作都很顺利。我不明白为什么？有什么问题吗？谢谢

* * * * * 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

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你想每秒呼叫一个页面吗？@VladutZzZ命令是每分钟呼叫一次。你不能每秒运行crontab