Description

Most of the services on Ubuntu Linux machines including gateways and Jetstream VMs are scheduled through crontab jobs.

Setup and Configuration

To access crontab, run the following command in terminal:

crontab -e

Maintenance and Troubleshooting

The source of crontab related problems often fall into two categories: 1- Crontab jobs are different between the admin user (root) and regular user (ubuntu). For the admin user, it can be accessed using sudo crontab -e and for the regular user with crontab -e. 2- To make sure the application paths are correct, using the absolute path for applications instead of relative path is strongly recommended. For instance, use /bin/ping instead of ping for the ping command.