Task Automation using ‘at’ service

March 27, 2017 Dhiraj 0

Scheduling one-time tasks has never been easier than using ‘at’ service. Time format of ‘at’:

Few examples and their meaning: $at 8pm Next upcoming 8pm $at 20:00 Same as above $at 9am Sunday Upcoming Sunday, 9 am $at 5pm […]

Managing Oracle Instance

February 17, 2017 Dhiraj 0

Oracle Database Startup Modes NOMOUNT MOUNT OPEN RESTRICT FORCE The first two( NOMOUNT and MOUNT) is known as maintenance mode. OPEN is general startup mode. Only DBAs can startup the instance in RESTRICT mode and access the database, other users […]

Bash Shell Scripting – Day 1

February 16, 2017 Dhiraj 0

Introduction to Bash Shell Scripting Bash( Bourne Again Shell) is the default shell script for RHEL. It was developed by Steven Bourne of AT & T for GNU Project. IT incorporates all major features of it predecessors- ssh( UNIX, default), […]

Getting Help by Using man in Linux/Unix Platform

January 13, 2017 Dhiraj 0

Using ‘man’ Page ‘man’ page displays commands objective, syntax and their option list. It also displays typical examples Syntax:


This command will show the list of available options in the cp(copy) command. The list will be sufficiently […]

Local Logging in RHEL 7

August 30, 2016 Dhiraj 0

It was a lovely experience installing Red Hat Enterprise Linux Server 6.5 (RHEL, hereafter) today. I installed it on my laptop on VMware Workstation 10. I kept gazing throughout the installation process without knowing what those white texts scrolling above the black background meant. […]