Add A Cron Job Ubuntu Code Example


Example: set cron job in ubuntu

Setting Up a Website Backup through Cron :- =========================================== Step 1: Update your server. As a best practice, we will update and upgrade our server with the following command. 	apt-get update && apt-get upgrade  Step 2: Verify if the cron package is installed. 	dpkg -l cron      	a) Our example output let’s us know that the cron package is installed, along  	with its version:  ||/ Name Version Architecture Description +++-=========================-=================-=================-======================================================== ii cron 3.0pl1-128ubuntu2 amd64 process scheduling daemon  	b) Install cron package if necessary. 		sudo apt-get install cron  	c) Ensure that the cron service is running with the following command: 		systemctl status cron 		 Example Output: ---------------- * cron.service - Regular background program processing daemon Loaded: loaded (/lib/systemd/system/cron.service; enabled; vendor preset:enabled) Active: active (running) since Sat 2018-10-27 02:53:20 EDT; 5 days ago  Step 3: Configure the cron job. When you are logged in as your user, you are creating a cron job under that user. Creating a cron jobs owner is helpful when to know who is in charge of the cron as well as how to alter the cron  job in the future. 	crontab -e  Step 4: The system asks which editor you’d like to use; this tutorial is using option 2 (vim.basic).  tom@host2:~$ crontab -e no crontab for tom - using an empty one Select an editor. To change later, run 'select-editor'. 1. /bin/ed 2. /usr/bin/vim.basic 3. /usr/bin/vim.tiny Choose 1-3 []: 2  Step 5: In this file, you’ll see # signs followed by the direction on how to #use the file. Allow us a minute to explain the syntax needed to create a cron #task.  # Example of job definition: # .---------------- minute (0 - 59) # | .------------- hour (0 - 23) # | | .---------- day of month (1 - 31) # | | | .------- month (1 - 12) OR jan,feb,mar,apr ... # | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat # | | | | | # * * * * * user-name command to be executed

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