This tutorial is intended to do two things: to expand on the Cron Troubleshooting article; and to give an overview of a simple scripting concept that uses the creation of a file as a flag to signify something is running. This is primarily useful when you need to run something continuously, but not more than one copy at a time. You can create a file as a flag to check if a job is already running, , and in turn, check for that flag before taking further action. Continue reading “Using a Cron Wrapper Script”
Cron jobs are an incredibly useful Linux tool aimed at saving you time by scheduling tasks within your server. A programmed cron task will execute commands within a script by the minute, day, week or month. They can be scheduled to do many tasks including backing up your server’s files nightly, updating inventory orders in a database or even compressing files for migrating. Repetitive tasks become a cinch when incorporating a cron job. While there are numerous ways to run a cron task, we will be using the crontab option that is inherent within Ubuntu to set up a nightly backup of our website. Continue reading “Create a Cron Task in Ubuntu 16.04”
Ansible is an easy to use automation software that can update a server, configure tasks, manage daily server functions and deploys jobs as needed on a schedule of your choosing. It is usually administered from a single location or control server and uses SSH to connect to the remote servers. Because it employs SSH to connect, it is very secure and, there is no software to install on the servers being managed. It can be run from your desktop, laptop or other platforms to assist with automating the tedious tasks which every server owner faces.
Cron is a service for Linux servers that automatically executes scheduled commands. A cron job can be a series of shell commands, scripts, or other programs. Cron tasks or jobs can perform a variety of functions and once ran can send out an e-mail message to inform you of its completion or errors. If you receive an error, there are many ways to troubleshoot the cron task. Use this article for troubleshooting assistance or a tutorial on the basics of cron jobs. If you would like to learn more about creating a cron job check out our Knowledge Base tutorials on the subject. Continue reading “Troubleshooting: Cron Jobs”
Over the years WHMCS has made some changes to where it stores certain directories, specifically directories outside of public_html. The goal of this is to increase overall security by moving sensitive files to a more protected location. While this change does help to improve WHMCS security, it also adds a few steps of complexity.
This article is meant to help simplify this complexity, or at least provide a reference configuration that you can use to troubleshoot cron issues, or gain a better understanding of WHMCS crons in general. I used WHMCS 7.3 for this article, but the general concept and instructions should apply for any 7.0 version of WHMCS.
Continue reading “Configuring and Troubleshooting WHMCS Crons”
Servers can automatically perform tasks that you would otherwise have to perform yourself, such as running scripts. On Linux servers, the cron utility is the preferred way to automate the running of scripts. In this article we’ll cover how to view the jobs scheduled in the crontab list. For an introduction to Cron check-out our KB: How To: Automate Server Scripts With Cron. Knowing how to setup crontab is an important skill, but even if you’re not editing these knowing how to view them is important as well. Continue reading “How to Display (List) All Jobs in Cron / Crontab”
Servers can automatically perform tasks that you would otherwise have to perform yourself, such as running scripts. On Linux servers, the cron utility is the preferred way to automate the running of scripts.
Continue reading “How To: Automate Server Scripts With Cron”