SUMMARY

Overall 7 years of experience in administering and troubleshooting servers as well as network issues. More than 6 years of experience on Unix/Linux Servers and in LAN and WAN network environment. More than 4 years of experience on Windows 2000/2003/2008 based Servers.

WORK EXPERIENCE

Confidential,New York, NY 10006 (Jan 2012 – Present)

Senior Systems Administrator

• Managed over 4000+ servers containing Centos 5.x, Debain, Ubuntu, Windows 2003 and Windows 2008 Operating System.
• Responding to tickets created by customers for support and troubleshooting issues related to Open Source applications and Operating Systems.
• Installing and configuring Varnish Caching with apache and nginx.
• Improving NFS performance and tweaking ext4 file system.
• Installation of Blade Server for cloud environment.
• Deploying Nagios with pnp4nagios, Ganglia and Munin monitoring system.
• Hardware and Software based Load Balancing.
• Mysql server upgrade and migration.
• Adding users in LDAP.

Confidential,Sayreville, NJ 08872 (Nov 2008 – Dec 2011)

Unix-Linux Systems Administrator

• Managed over 5000+ servers containing Centos 5.x, Fedora, FreeBSD 6.x, 7.x, and 8.x, Debain, Ubuntu, Windows 2003 and Windows 2008 Operating System.
• Installing and configuring Apache, Lightttpd, Nginx, php, MySql, Vsftpd, Postfix, Sendmail, Dovecot, Squirrelmail, PhpMyAdmin, Spamassassin, Calm Antivirus, Squid proxy on Unix and Linux servers.
• Responding to tickets created by customers for support and troubleshooting issues related to Open Source applications and Operating Systems.
• Implementing hybrid web server configuration to speed up static file loading.
• File system tuning with ext3, ext4, reiserfs and xfs file system.
• Tweak & Tuning of Apache, Lighttpd, Nginx, Mysql, php, NFS for an optimal performance.
• Varnish with memcached caching server with multiple php-fpm.
• Migration and cloning of Linux and Unix servers.
• Configuring Postfix as SMTP mail gateway server for relay with domainkeys and dkim validation.
• Configuring software raid0, raid1, raid10 and raid5.
• Configured and managed of Lustre File system with storage capacity of 68TB.
• Implementing and configuring Gluster File system with storage capacity of 32TB.
• Implementing OCFS2 file system with Drbd using ISCSI and ATAOE
• Upgrading of Lustre 1.8.2 to 1.8.5 version.
• Installing and configuring Robinhood to monitor storage space utilized by each user.
• Installing and configuring Bind DNS and DJBdns with Geo location feature.
• Installing and configuring LVS load balancer, with High Availability and failover.
• Installing and configuring NTP server, NIS Master and Slave server, NFS and Samba server.
• Installing and configuring PopTop and OpenVPN for VPN connection.
• Installing and configuring nagios, cacti, ganglia, collectl and munin monitoring tools.
• Installing and configuring awstats and webalizer web stats analyzing software.
• Chroot jail set up for ftp, sftp and SSH users. Proxyftp for securing the FTP connections.
• Implementing firewall using iptables on linux OS and ipfw on FreeBSD.
• Install and configure Open Source CMS like Wordpress, Drupal and Joomla.
• Installing and Managing WHM/Cpanel control panel for customers.
• Installing and configuring IIS on windows 2003 and windows 2008 server.
• Implementing a Cloud computing Infrastructure using Citrix Xen Hypervisor and KVM Hypervisor.
• Implemented CloudStack, OpenStack and Eucalyptus for cloud computing test infrastructure.

Confidential,New York, NY 10038 (May 2007- March 2008)

Unix-Linux Systems Administrator

• Administering, managing and troubleshooting around 65 servers which include Linux, UNIX and Windows Operating System.
• Backing up of MySQL database with using LVM snapshots for live backup.
• Migration of 3 database server from Gentoo OS to Centos 5 and database version upgraded from MySQL 4.1 to MySQL 5.1v
• Implemented 5 new web servers with FreeBSD 6.2, Apache 1.3 and PHP 4.4 with mirroring.
• Rebuild and compiled a custom kernel to get multi-CPU support using SMP option and used kernel debugger option to debug the FreeBSD operating system crash.
• Implemented a script to tweak and configure FreeBSD server after fresh install.
• Installed and configured MRTG graphing for all the servers and switches.
• Configuring and Managing BIG IP F5.
• Installed and configured Awstats for web log analyses of the entire Endai web based product, on FreeBSD 6.2.
• Configuring and Maintaining djbdns, Postfix mail server, Exchange 2003 server, Windows Active Directory, Samba, NIS and NFS Server.
• Implemented Nagios monitoring system on FreeBSD 6.2.
• Operating system Environment is FreeBSD 4.X, 5.X, 6.2, Centos 5, Gentoo, windows 2003 and windows XP Pro.
• Installed and configured Twiki for documentation.
• Installed and configured Vsftpd server for FTP access.
• Installed and configured DjbDns dnscache caching server.
• One year Datacenter Experience at TeleHouse Datacenter [New York].

Confidential,Gujarat, INDIA (ISP service Provider) (Aug 2002-July 2004)

• Installing and Configuring of DNS, Bind Dns, DHCP, Apache, Qmail, PHP, MYSQL, VPOPMAIL, COURIER-IMAP, SQWEBMAIL, SQUIRRELMAIL on Linux and Solaris.
• Configured Cisco Catalyst 2950T-24-port Switch and modems.
• Scheduling jobs using “at” and “crontab” commands.
• Shell scripting
• LVM, RAID, Solstice DiskSuite, Solstice Adminsuite
• Complete planning, building and administering LAN and troubleshooting the network.
• Applying Firewall using IPchains and IPtables.
• Administered leased lines VSAT bandwidth of Bharti Broadband Networks Limited.

Confidential,Gujarat, INDIA (Website Developer and Hosting) (Aug 2001-July 2002)

• Installation and maintenance of NT and windows 2000 server.
• Active Directory: -DNS with Active Directory support, to join Windows 2000 Professional to Active Directory, to join Windows ME to Active Directory, Administrative Software Installation on Windows 2000 Server. MS Office Word, Excel, PowerPoint and Outlook Express.
• Configuring proxy.
• Internet Services: -Installing IIS, HTTP (Web) Services, and PHP 4 on IIS 5.0 on Windows 2000 Server.
• Remote Access Services, VNC (Virtual Network Computing), Terminal Service (Remote administration mode), Power Management on Windows 2000 Server.
• Setting the profiles, policies and the print services for the users and groups.
• SYSTEM PROFICIENCY
  Technical Key Skills:

Installing and Configuring Bind DNS, DjbDns, DHCP, NIS, NFS, Squid, Samba, MAIL with Postfix, Qmail, and Sendmail, Vsftpd, Proftpd, ProxyFTP, POPTOP, OPENVPN, APACHE, LIGHTHTTPD, NGINX, PHP, MYSQL, TOMCAT, LOAD BALANCING, VPOPMAIL, COURIER-IMAP, SQUIRRELMAIL, SQWEBMAIL, MAIL-SCANNER, SPAMASSASSIN, CLAM-ANTIVIRUS, NAGIOS, BIG BROTHER, GANGALIA, COLLECTL, MRTG, CACTI, MUNIN, TWIKI, AWSTATS, WEBALIZER, on Linux and Unix. Shell scripting, Perl, LVM and RAID. Parallel file systems like GlusterFS, Lustre, GFS2, and OCFS2.

Operating System:
FreeBSD 4.x, 5.x, 6.x, 7.x, 8.x Centos 6.0, 5.x, Debain, ubuntu, Gentoo, Sun Solaris 8, Red hat Linux 7.1,7.2,8, Fedora core, Windows 2008, Windows 2003, Windows 2000, Windows XP Home & Pro, Windows NT 4.0, Windows (95, 98, ME), and DOS

Server Platform:
Dell PowerEdge 2950, Dell PowerEdge 1950, Dell PowerEdge 1850, Dell PowerEdge 1435, Dell PowerEdge 1425, Dell Blade Servers M610e with M1000e, SuperMicro, Blade Server RLX 24 blades, SUN Ultra 5/10, Sparc Station (10, 5) and IBM x200 series server

Devices:
Cisco Router 2800, 6500 series, Cisco 2960, 2950 Switches, Rad Webranger T1 Router,
Sonicwall firewalls, Repeaters, Hubs, SCSI Devices, LSI Raid, 3ware, and BIG IP F5 Product.

CERTFICATION

SCSA – CX-310-203 (Sun Certified System Administrator) for Solaris 10 OS
SCNA – 389 (Sun Certified Network Administration)
SCSA – 238 (Sun Certified System Administration-I)
SCSA – 288 (Sun Certified System Administration-II)
CCNA (Cisco Certified Network Associate)
MCSA 2003 (Microsoft Certified Systems Administrator)
MCSE 2003 (Microsoft Certified Systems Engineer)
MCSE 2000 (Microsoft Certified Systems Engineer)
MCP (Microsoft Certified Professional)

EDUCATION

Bachelor of Science in Networking Technology
Diploma in Automobile Engineering