cron command is used to schedule the task daily at the same time repeatedly. "at" command is used to schedule the task only once i.e to run only one time. cron can be edited at cannot be edited, after its schedule. mohammedrafi@NOC-RAFI:~$ at 21:22 warning: commands will be executed using /bin/sh at> echo "this is … Continue reading Diffrence b/w at and cron

Introducing process basics A running instance of a program is called as process. A program stored in the hard disk or pen drive is not a process. When that stored program starts executing, then we say that process has been created and is running. Let's very briefly understand the Linux operating system boot-up sequence: 1. In … Continue reading Introducing process basics

Before Learning shell-script we need to know few prerequisite lets know them first things first https://shaikmdrafi.wordpress.com/2016/04/28/shell-scripts/ Comparison of shells Initially, the UNIX OS used a shell program called Bourne Shell. Then eventually, many more shell programs were developed for different flavors of UNIX. The following is brief information about different shells: •Sh—Bourne Shell •Csh—C Shell •Ksh—Korn … Continue reading shell-scripting deep dive