需要从Web界面编辑root crontab作业？

I want to edit the crontab of root from the web interface. I have Apache and PHP installed on my Ubuntu. If there is any permissions required please also mention that.

I want to edit the crontab of root. I have some jobs running in that crontab. One of my projects wants me to change the running jobs Time from web interface.

So please tell me how can I access the crontab of root and edit it.

if you have access to the console, you should install webmin for web management interface of the server

http://www.webmin.com/

permission problems: solve those by allowing www-data to run the appropriate commands via sudo.

run crontab -u root -l to get the current crontab, edit it with php string manipulation code of your liking and intall it with crontab -u root $FILE. i recommend to place markers in the file to make it easier to find the correct places to edit like so:

# Edit this file to introduce tasks to be run by cron.
# ...
# m  h  dom mon dow   command
  0 14   27   *   *   backupmails-monthly.sh
  0 14    *   *   5   backupmails-weekly.sh
# MARKER_EDIT_HERE_START
  0 14   27   *   *   job_to_edit.sh
# MARKER_EDIT_HERE_END

a better solution if jobs run regularly: don't put them in the crontab but in /etc/cron/cron.{hourly,daily}.

These days there are tools like