The GNU/Linux system supports several utilities for scheduling tasks. The cron utility is the most widely supported. It allows you to schedule tasks to be run in the background at regular intervals. The cron utility uses a table (crontab) with a list of scripts or commands to be executed and the time when they are […]
Archives for August 2018
Understanding How an Email System Works
E-mail has become an extremely popular communication tool. A solid understanding of email system concept helps system administrators to investigate various kinds of issues with the email system. 1. How does an email travel The diagram below shows a typical sequence of events that takes place when Alice composes a message using her mail user […]
HDPCA Practice Exam Questions and AWS Instance Setup Details
Before taking the HDPCA exam, you can get the feel of the exam by using the HDPCA practice exam on AWS cloud. The practice exam is very similar to the actual exam. You can perform 6 tasks for practice on this machine. The recommended instance configuration in AWS is m3.2xlarge which has 30 GB of […]