Imej profil greendesertweb
Penanda India Hanumangarh Town, India
Ahli semenjak 30 Mei 2011
1 Cadangan


Dalam Talian Luar Talian
Linux server administrator with more than 5 year of experience in the management and analysis of linux servers. Advance knowledge with setup highly scalable servers with performance tuning, server security, Cloud Computing, Amazon EC2, Troubleshoot problems. Expertise in - Designing Web Server - Buliding web server based on Apache, Nginx, Nginx/php-fpm, Varnish as backend. Security - Malwaere removal , server hardening , Firewall, SSL Certificate installation. Database Server - Building mysql ,tweaking mysql variables for performance Scripting - Bash Scripting for monitoring servers, auto backup. Mail server- Building mail server for sending and recieving mails exim,postfix,sendmail,troubleshoot mail issues. Monitoring services and servers - Nagios monitoring tool Amazon - AWS EC2 server setup , Security. Performance - Tune web & database server, varnish, redis, pagespeed, memcache, apc with Magento, Wordpress,Joomla. Virtualization Technology - VMware VSphere Esxi/Xen Server
$10 USD/hr
29 ulasan
  • 97%Kerja Diselesai
  • 97%Mengikut Bajet
  • 97%Tepat Pada Masa
  • 18%Kadar Ulang Upah


Ulasan Terkini

  • Imej abbakhan Project for Sahil K. -- 2 £115.00 GBP


  • Imej abbakhan Project for Sahil K. €1420.00 EUR

    “Sahil is a fantastic professional in his work and customer service! One can get a freelancer like him only in dream, its good luck for me to get him in real life, specially in the deep jungle of FL "professionals" His attitude in work, service, quality overall everything is TOP class +”

  • Imej paolonewage Project for Sahil K. £10.00 GBP

    “Professional, fast and...knows what the job!!”

  • Imej hannesmeyne Project for Sahil K. -- 2 €70.00 EUR

    “Always a pleasure to work with Sahil!”

  • Imej hannesmeyne Project for Sahil K. $25.00 USD

    “Great work!”

  • Imej hannesmeyne Server expert nginx, apache, plesk €24.00 EUR

    “Very good! I will hire sahil again and he did a great job! Recommend!!!”


Linux Server Administrator

Feb 2014

System administration of multiple servers (Red Hat, Centos,OpenSuse,Ubuntu). Installation of different types of linux Distro with XenServer and VmWare Esxi for VPS Setup. Configuring Apache,Nginx Web servers, SSLs,Php,Php-FPM, Mysql Tuning. Worked with Mail server (Sendmail,iRedMail,Exim,Postfix) Worked with Git,Svn version control system. Bash Scripting for Automated backup of servers and monitoring servers. Varnish,Redis,Memcache installation and configuration. Nagios Monitoring Servers.

System Admin

Aug 2010 - Feb 2012 (1 year)

Installation of different types of linux Distro with ftp/http/network installation. Shell Scripting (Bash). Configuring apache web servers, SSLs,Php. Worked with Mysql Performance Tuning. Monitoring servers using Nagios open source tool. Worked with Sendmail,Postfix mail server. Package installation Using “Yum” ,”rpms”,”Zypper” and “Source”. Worked with OpenFire Internal messenger tool. Configured Tripwire for monitoring files. Worked with Git,Svn version control system. Created bash script for Automated backup of servers and monitoring servers. Server Optimization with different application. Configuring Tomcat,Java Bridge for Payment Gateway.



2006 - 2010 (4 years)


2012 - 2014 (2 years)


Red hat Certified Engineer (2009)

Engineering College Bikaner

Certification for Linux Administration


ECR(Encryption with Cover Text and Reordering) based Text Steganography

This paper presents ECR(Encryption with Cover Text and Reordering) based text steganography approach which works on simple encryption technique using ExOR Operation of to characters and reorder them which would be more secured and hard to fetch original message from enciphered text. Our encrypted text is reordered using Eight bit random key for hiding our data in a more secure way. Our Eight bit random key will contain four number of zero and four number of one where one bit describes our encrypted text and

PDAC (Parallel Encryption with Digit Arithmetic of Cover Text) Based Text Steganography

This paper presents an efficient text steganography approach based on simple mathematical calculation and parallelism. In this approach we are doing simply addition and subtraction with the digits of ASCII code of each character of cover text and then this new digits will use to encrypt our plaintext. For enhancing the performance of our algorithm we use parallelism for encryption. In this approach one character of cover text hides four character of plaintext so it will increase the performance such as me


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