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Avatar del usuario
$15 USD / hora
Bandera de INDIA
hanumangarh town, india
$15 USD / hora
Aquí son las 2:31 p. m.
Se unió el mayo 30, 2011
1 Recomendación

Sahil K.

@greendesertweb

4,9 (30 comentarios)
5,6
5,6
86%
86%
$15 USD / hora
Bandera de INDIA
hanumangarh town, india
$15 USD / hora
97 %
Trabajos finalizados
62 %
Dentro del presupuesto
62 %
A tiempo
17 %
Tasa de recontratación

Linux System Administrator

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

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Portafolio

1826517
1826517

Comentarios

Cambios guardados
Mostrando 1 - 5 de 30 reseñas
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5,0
$300,00 USD
He is a great guy to work with, we will work with him again
Avatar del usuario
Bandera de Bashar S.
@slashtec
hace 2 años
5,0
$40,00 USD
Hope we will work again soon, thank you
System Admin
Linux
Windows Server
Ubuntu
VMware
E
Bandera de Shai C.
@erany
hace 5 años
4,8
£1.615,00 GBP
Excellent
PHP
System Admin
Linux
Joomla
+1 más
Avatar del usuario
Bandera de Abba K.
@abbakhan
hace 6 años
5,0
€1.420,00 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 +
PHP
System Admin
Linux
Joomla
+1 más
Avatar del usuario
Bandera de Abba K.
@abbakhan
hace 6 años
5,0
£10,00 GBP
Professional, fast and...knows what the job!!
PHP
Script Install
System Admin
Linux
Web Security
+1 más
Avatar del usuario
Bandera de Paolo P.
@paolonewage
hace 6 años

Experiencia

Linux Server Administrator

Emizentech Pvt. Ltd.
feb 2014 - Presente
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

Eperium Business Solution India
ago 2010 - feb 2012 (1 año, 6 meses)
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.

Educación

M.Tech.

India 2012 - 2014
(2 años)

B.Tech.

India 2006 - 2010
(4 años)

Calificaciones

Red hat Certified Engineer

Engineering College Bikaner
2009
Certification for Linux Administration

Publicaciones

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

Elsevier
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

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

IEEE
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

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Certificaciones

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