How do I edit crontab for another user?
How to Create or Edit a crontab File
- Create a new crontab file, or edit an existing file. $ crontab -e [ username ]
- Add command lines to the crontab file. Follow the syntax described in Syntax of crontab File Entries.
- Verify your crontab file changes. # crontab -l [ username ]
Where are user crontabs stored?
/var/spool/cron/crontabs
The crontab files are stored in /var/spool/cron/crontabs . Several crontab files besides root are provided during SunOS software installation (see the following table). Besides the default crontab file, users can create crontab files to schedule their own system events.
Where are crontab scripts saved?
In Red Hat based distributions such as CentOS, crontab files are stored in the /var/spool/cron directory, while on Debian and Ubuntu files are stored in the /var/spool/cron/crontabs directory. Although you can edit the user crontab files manually, it is recommended to use the crontab command.
Is it possible for crontab to allow you to designate a user to run a script as?
The crontab command line option -u allows you to specify an username and edit the jobs of that user. But sometimes, you want to run a particular command as another user while still using the root or super-user crontab. You can use the su or sudo command to do that.
How can I list the crontabs for all users?
Or you can find crontab from spool where is located file for all users. cat /var/spool/cron/crontabs/ . To show all users’ crontabs with the username printed at the beginning of each line: cd /var/spool/cron/crontabs/ && grep .
Where is the global crontab saved in cronjob?
Each user’s local crontab is saved at /var/spool/cron/crontabs/ whereas the global crontab for a system is saved at /etc/crontab. This will be the file we will use to set up our automatic updates.
How to find all cron jobs for all users?
As a rule, you should always use crontab -e and never modify crontab files directly. Doing so ensures your changes are valid and picked-up by the cron daemon. But when the job is just viewing the crontabs, looking at the files themselves is the easiest way to find every job for every user.
How to schedule APT Update with cronjob?
We will add the job of updating our system to the global crontab. To do so, we open the file using our preferred text editor. Once we enter the file, we will add the following command to the cron jobs list. This will schedule the system to call apt update and apt upgrade through the root user every Wednesday at 8 PM.