Reboot to windows form linux-Only for once

Follow the below steps to boot to windows when you are in Linux.

1. check the entries in grub.cfg

[sudiptakumar_laha@symc Desktop]$ sudo grep '^menuentry' /boot/grub2/grub.cfg
menuentry 'CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-327.el7.x86_64-advanced-e138508e-48ed-4b19-9bcc-446bbfa2da86' {
menuentry 'CentOS Linux (0-rescue-a962980d35964ca6aa2a4d23e8f02266) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-0-rescue-a962980d35964ca6aa2a4d23e8f02266-advanced-e138508e-48ed-4b19-9bcc-446bbfa2da86' {
menuentry "Windows 7" {

2. Here we see windows 7 is the 3nd meny entry and the index is 2 starting from 0. Hence sent grup-reboot 2

[sudiptakumar_laha@symc Desktop]$ sudo grub2-reboot 2

3. Now reboot your computer.

[sudiptakumar_laha@symc Desktop]$ sudo reboot

Elasticsearch -Part 1

Brief of elasticsearch

Elastic search organizes your data  a makes it available for online searching.

Similar products:

1. Apache Lucene

Installation prerequisites:

• A virtual machine with Linux installed.  One of the option may be to use oracle virtual box(https://www.virtualbox.org/wiki/Downloads) and  and Ubuntu 16(http://www.ubuntu.com/download/desktop) installed. All are available for free.
• Download elaticsearch tar from the url https://www.elastic.co/downloads/elasticsearch

Installation instructions:

• Create a directory /elaticsearch  and copy elasticsearch-2.3.4.tar.gz  inside the directory.
• cd /elasticsearch
• Extract the elasticserach contents tar -xvf elasticsearch-2.3.4.tar.gz

Starting elastic search

• Go to the bin directory of the elaticsearch folderextracted folder  and execute the below command.
• /elasticsearch

Verify elastic search install

• Open your preferred browser
• Go to url "http://localhost:9200/?pretty" . If you see a proper response then elastic search is installed properly