Should I run crontab as root?

Should I run crontab as root?

3 Answers. If you have secured access to the script sufficiently and made sensible precautions, running something from roots crontab is not usually a security risk. But don’t run a script as root that a non root user can edit or overwrite. This applies to jobs run from cron as well as interactively.

Where is the system crontab?

/var/spool/cron/
When you create a crontab file, it is automatically placed in the /var/spool/cron/crontabs directory and is given your user name. You can create or edit a crontab file for another user, or root, if you have superuser privileges. Enter crontab command entries as described in “Syntax of crontab File Entries”.

Does sudo crontab run as root?

Yes, indeed they are different. The difference is that with sudo crontab -e the commands are schedule with root user’s credentials. So that the commands in the sudo’s cron table are executed as root user. But with crontab -e , the commands are scheduled with the regular user who is logged in.

What is a system crontab?

Cron is a system daemon used to execute desired tasks (in the background) at designated times. A crontab file is a simple text file containing a list of commands meant to be run at specified times. It is edited using the crontab command.

What is sudo crontab?

crontab -e edits the crontab for the current user, so any commands contained within will be ran as the user who’s crontab you are editing. sudo crontab -e will edit the root users crontab, and so the commands within will be run as root.

Where is crontab log?

By default the cron log in Ubuntu is located at /var/log/syslog. Use the below command to check the cron entries in this file.

Does crontab read .profile?

Cron does not read the.profile,.cshrc, etc. You must add the.profile to you cron script.

Where is crontab file located?

Each user on your system can have a personal crontab. Crontab files are located in /var/spool/ (or a subdirectory such as /var/spool/cron/crontabs), but they are not intended to be edited directly. Instead, they are edited by running crontab.

What does list in crontab do?

Cron Job Time Format. The first five fields in the command represent numbers that define when and how often the command runs.