Day 6/100 of DevOps

Task: a. Install cronie package on all Nautilus app servers and start crond service.

b. Add a cron */5 * * * * echo hello > /tmp/cron_text for root user.

Here, there are 3 applications. We need to make changes in all of these.

Steps:

1. Connect to the target server (App Server)

   ssh tony@stapp03

2. Switch to the root user for administrative privileges:

   sudo su - or sudo -i

3. Install the cronie package (cron implementation)

   yum install cronie -y

4. Start the Crond service and check the status

   systemctl start crond

   systemctl status crond

6. Open the root user's crontab for editing

   sudo crontab -e

7. Add the following line to the file

   /5 * echo hello > /tmp/cron_text

*/5: This specifies that the command should run every five minutes.

* * *: These asterisks represent the hour, day of the month, month, and day of the week, respectively, indicating that the job should run regardless of these values.

echo hello > /tmp/cron_text: This is the command to be executed, which writes "hello" into the file

/tmp/cron_text, overwriting its content each time.

Once Added, resrat the Crond service

systemctl restart crond

8. Verify the changes

   After 5 minutes, I confirmed it worked by checking with:

   cat /tmp/cron_text