SUMMARY

• Over 17 years of industry experience in administration & supporting with Red Hat 4,5,6,7 SuSE Linux 9,10 SUN Solaris 6,7,8,9,10.
• Exclusive experience in System Administration, Installs, OS upgrades, Patching and Performance tuning.
• Working with big financial companies from past 5 years. Managing trading infrastructure & Mission Critical regulatory applications.
• With excellent scripting skills, I can manage thousands of mission critical production servers like one server.
• Experience in configuring Jumpstart and Kickstart servers for complete hands - free installation of servers, with custom profiles, begin/finish scripts, custom package suites/clusters.
• Experience with VMware, creating Linux VMs, relocating VMs from one cluster to other using Vmotion, converting Physical to Virtual using P2V.
• Deploying packages using Bladelogic & spuds, troubleshooting & fixing the issues encountered during installations.
• Experience in firmware upgrades on Oracle ilom, alom & HP iLo consoles.
• Configured NIC bonding on Redhat 5/6 and IPMP on Solaris 8/9/10 servers.
• Experience in Puppet, PXE, IPtables, Red Hat clusters, LVM, VxVm, SVM.
• Using Linux native multipathing for dual presented external storages. Creating & managing filesystems with LVM, VxVM.
• Expertise in using multipathing softwares like powerpath, MPxIO, VxDMP, & native multipathing.
• Well experienced in troubleshooting SAN & NAS storage performance related issues.
• Experienced in SAN storage frame based migrations & host based migrations.
• Data migration approaches include Veritas volume replicator, storage based replication solutions like SRDF & host based migrations using VxVM, SVM, and ASM rebalance.
• Experience in supporting 11g RAC environments including installs, upgrades, managing ASM storage activities.
• Implementation of RAID technology using VxVm, SVM & Hardware RAID tools.
• Planning, documenting and supporting high availability, fail-over, fail-back using Veritas Cluster Server, Veritas cluster file systems in SAN environment.
• Planning & creation of clones & BCVs for multi-Terabyte databases to have backups configured via Netbackup media servers.
• Resolve technical problems as they happen, take ownership of problems & work on resolutions using both internal resources & third-party technical support partners (Redhat, Oracle, Symantec, EMC, Hitachi, NetApp and HP).
• Involved in Major Incident management calls & assisted in critical outage situations to isolate the root cause, put a temporary fix in place, and recommend long-term fixes.
• Experience in troubleshooting and resolving network issues related to the servers.
• Involved in gathering requirements for new projects & providing optimal, cost-effective solutions.
• Experience in making Disaster Recovery and Disaster Contingency Plans.
• Active participant in coordinating with different teams such as Network Engineers, Database team and application teams to resolve the issues and provide Customer Satisfaction.

TECHNICAL SKILLS

Language: Perl, shell scripts, expect, PHP scripts, printer filter (PCL codes), C, VB Script, java scripts, HTML, PL/SQL,PowerShell,Ansible, hammer

OS: Redhat Linux, Solaris, Fedora, CentOS, Tru64 UNIX, HP UNIX, IRIX UNIX, Windows (Station & Server), VMware vSphere 5.5, Novell Netware, SuSE Linux, IBM AIX.

Database: Oracle server, Oracle RAC, MS SQL, MS Access, MySQL server, GEMS database, PostgreSQL

Cloud Computing: Oracle Exalogic Elastic Cloud Machine, AWS

Harwdare: DELL Poweredge, DELL Bladeserver, HP Proiant Series, HP Blades, HP Proliant series, SUN Ultra Enterprise, Sun Fire, Sun Sparc Engerprise T series, Compaq Proliant server etc.

Software fault tolerance: Redhat Cluster, Sun Cluster, VERITAS cluster, Round Robin, Heartbeat, LVS, F5 Load Balancer (GSLB, WIP/VIP), Solaris SVM (disk mirror, disk set), GFS

RAID: disk mirror, RAID 5, RAID 1+0, RAID 6, Network disk mirror (DRBD)

Storage area network (SAN): EMC SAN disk, Hitachi SAN disk, 3par SAN disk, NAS, Promise VTrak E610, NetApp

Network fault tolerance: IPMP, Bonding Ethernet Interfaces in Linux Gigabit Network Kernel ByPass (OpenOnload)

System Monitor: Nagios, Hobbit (Xymon), Whatsup, SNMP, Tripwire, netprobe, nimsoft, auditd

Kickstart server build: httpd/xinetd/syslinux/ tftp-server/dhcpd/cobbler

Network Security: VPN server, SSH Tunnel, Bridge Networks (branch office to headquarter) with OpenVPN.

Networking: DNS server, WINS server, DHCP server, Cisco PIX firewall, Cisco RSM (Vlan), Cisco switch

Authentication: Active Directory, Kerberos, LDAP server, NIS, Single Sign On, Smart card, Citrix, Trusteer, Cloakware, CyberArk

File server: NFS server, Samba server

Email servers: Sendmail server, Cyrus IMAP server, Exchange server, Lync server, SharePoint, IIS server, SquirrelMail server, LimeSurvey, Sentrion Sendmail, Orchestria (Data Loss Prevention), SVN repository, FTP Voyager, Remote syslog setup

Backup & Restore: Legato, CommVault, IBM TSM

Console Access: Raritan IP-Reach, HP iLO, Terminal Server, LOM, ILOM, RSC, ALOM, XSCF. VMware client

Application servers: Apache web server, Tomcat, Oracle Weblogic, Oracle Application Server, EZProxy Server

Big Data: Handoop

UPS: APC

Version control: SVN

Internet Protocol: IPv4 and Ipv6

PROFESSIONAL EXPERIENCE

Sr. Linux/Unix Administrator

Confidential, Raleigh, NC

Responsibilities:

• OS patch/upgrade with ansible script (Power on Cloud VM hosts, pre checkout, OS patch, reboot, post checkout, etc)
• Using hammer for change in Satellite.
• NAS filer migration from NetApp and SAN storage migration to Dell EMC Unity hardware as part of Storage fransformation.
• NAS,vxfs, LVM, ASM. It save significant maintenance cost, provide “ALL flash” storage to customers.
• Server migration from OMA data center (NY) to CDC data center in New Jersey. (OTV, VLAN change, VCS cluster, Oralce Cluster, QIP, HP ILO, etc)
• EXSI VM server migration from one cluster to another. (IP, default gateway, hostname change)
• Fed White Paper Test Support
• SAN switch migration for more than 500 physical servers (Vxdmp, powerpath, multipathd multiple path heatch checkout)
• OS upgrade for Redhat Linux servers, spacewalk migration to satellite (VCS cluster, Oracle RAC, PeopleSoft, Informatic, etc)
• SSL certificate migration from SHA1 to SHA2 for Web server ansApplication.
• FTPS server/client setup, troubelshooting, etc (certificate renewal, permission, etc).
• Controm-M Agent install, control-M batch job troubleshooting.

Sr. Linux/Unix Administrator

Confidential, Jersey City, NJ

Responsibilities:

• Manage about 20000 UNIX/Linux/AIX servers (Physical servers/ESX Virtual servers).
• Solaris Physical virtual hosts (globalzone/localzone). SuSE Linux, Redhat Linux, AIX (HMC/VIO servers/LPAR).
• Authentication type include NIS, LDAP (SSH Tectia Server), Kerberos (Centrify SSH). Powerbroker (pbrun).
• Support Oracle Exalogic Elastic Cloud Machines. Troubleshooting alerts for Exadata.
• Managing trading infrastructure & Mission Critical regulatory applications.
• Extensive low latency network tuning and testing Infiniband, VMA, Mellanox and SolarFlare 10GigE.
• Closely work with DBA/Storage Team for disk space carving (SAN storage/NAS storage), SAN multipathing (vxdmp, powerpath, multipathd), Storage replication/split/re-established.
• Storage uplift for VCS cluster.AIX LPAR.
• VCS DR test for SRDF between two data centers and SRDF/STAR Configuration for the replication of data stored in EMC Symetrix arrays over three data centers.
• Support CIFS, NFS, Samba, NAS, GFS. Solaris SVM (disk mirror, disk set).
• Server patch (Solaris, SuSE, AIX, Redhat Linux)
• TSM backup and recovery and troubleshooting backup failure issues (i.e. backup missing, check archive, restore data per request, etc).
• Rebuild NTP server from backup tape due to disk failure. Rear backup and recovery.
• Fix network issues (i.e. cable, IPMP, flap, etc), Troubleshooting Control-M issues.
• Hardware health monitoring/replacement. Identify Hardware issues and work with App owner/ Vendor to get issued fixed.
• WOA-StealthAUDIT auditing tool, Titian, Symantic Enterprise Security Manager, Fixed nimsoft/geneos netprobe alerts.
• Fix compliance issues (SSL/TLS issues, permission issue, etc), disk space issue,
• Fix CyberArk issue (i.e. root account not synchronized, root account missing in CyberArk).
• Decommission server. Build server (Solaris/SuSE Linux, Redhat Linux) using pexlinux.
• Bladelogic install softwares (Control-M, netprobe, etc). Bladelogic Agent Troubleshooting (UNIX server missing in Bladelogic console, agent is not alive)

Sr. Linux/Unix Administrator

Confidential, Raleigh, NC

Responsibilities:

• Manage about 2000 UNIX/Linux servers (Physical servers/ESX Virtual servers/ PROD/DR, BCV, UAT, DEV, IT servers/Solaris VM hosts, SuSE Linux, Redhat Linux).
• Authentication type include NIS, LDAP (SSH Tectia Server), Kerberos (Centrify SSH).
• Support about 2500 database (Oracle RAC, Oracle DataGuard, Sybase Database), PeopleSoft, Informatica, etc.
• Close work with DBA/Storage Team for disk space carving (SAN storage/NAS storage)
• SAN multipathing (vxdmp, powerpath, multipathd), Storage replication/split/re-established. Fixed max lun issue for Redhat Linux.
• Setup Control-M Agent for Application Team, and troubleshooting Control-M jobs.
• FTPS setup, certification installation, troubleshoot FTPS/Vsftp/FTP related issues.
• Troubleshoot ASM disk related issue (i.e. permission issue, ASM disk missing, SAN/NAS storage disk I/O issue), closely work with Application Team/DBA/Storage Team/Network Team.
• System heath checkout on daily basis and fix all issues related to system (i.e. certificate expire, VCS alerts, console, Vxfs disk group issue, file system issue, disk space issue
• HBA issue, netmask issue, ntp issue, powerpath issue, vxdmp issue, Veritas vxvm issue, etc)
• Trouble performance issues related to Oracle database, PeopleSoft, Informatic, etc (top, sar, iostat, ps, vmstat, etc).
• Server/Service group/SAN disk space/NAS storage decommission.
• Console access (ILO, VMware vSphere Web Client, different console for Solaris like oconsole, zlogin, telnet), cold boot/hot boot.
• BMC PatrolAgent/BMC RTServer, Cloakware, geneos netprobe, netbackup, ptgagent, spacewalk, splunk, splunkagent, tripwire, weblogic, automount,
• User access permission issue (netgroup for NIS, LDAP/Kerberos access, user permission, sudo permission, user/machine netgroup, etc).
• Aperture for house keeping server HW, and HPAM for server house information keeping.
• Software installation via Bladelogic, SPUD2, spacewalk, yum, rpm, etc. Fix Control-M job issues
• Fixed bond interface issue/global LDAP server issue, etc. Oracle performance tunning (sysctl.conf, limit.conf, etc)
• Collect coredump file, sosreport for Vendor when server hang, process crash abnmormally. scp/ssh without password setup
• Java Performance tunning by changing TCP max buffer size in sysctl.conf (net.core.rmem max/ net.core.wmem max)
• Puppet master/puppet client.
• QMW/QUID/PFT tests quarterly. On call, IM call, etc.

Sr. Email Engineer

Confidential, NYC, NY

Responsibilities:

• Migrating Legacy Application servers from UserDB into AMG.
• Global Support backbone Messaging Operation.
• VMware imaging and installing Sentrion backbone mail servers.

Sr. Email Engineer

Confidential, Warren, NJ

Responsibilities:

• Build UAT/PROD mail servers for backbone Email infrastructure (Hub, DMZ, etc) from scratch. Build Sentrion Admin servers, LDAP servers for Sentrion mail servers, use SVN repository for revision control.
• Build two central maillog servers behind WIP F5 load balancer in two different data centers. Create F5 Load balancer (WIP/VIP) for mail server in case MX record is not available for Application.
• Added new server in Nagios for health monitor. Closely work with DNS Team/Network Team/DLP Team/Exchange sever
• Team/Storage Team/DLP Team/ GEMS database/ FTP Voyager/ ProofPoint/ VMWare Team for the mail server migration project.
• Write shell and power shell scripts to analyze maillog files, monitor mail traffic, confirm ports open, etc
• Test and implement new release from different team in backbone UAT and Production environments.
• ITIL Change Management, DNS/Firewall request.

Sr. Linux/Unix Administrator

Confidential, West Long Branch, NJ

Responsibilities:

• Daily support and maintain all those servers and Application running in UNIX/Linux server.
• Redhat rhn register. Upgrade Dell server BIOS, Raid controller Firmware, Lantronix Box firmware for printer server, HP printer firmware.
• Enable KerberOS authentication for our UNIX/Linux servers.
• Enabled our monmouth.edu. with DNSSEC
• Setup ntp, logwatch, logrotate in all UNIX servers. Server performance tuning. Troubleshoot server all issues in our servers.
• Virtualize Linux server in VMware vSphere 4. Snapshot Linux server, clone Linux server, VDR backup.
• Setup Whatsup use Unix syslog file for email alert.
• Enable remote logging with syslog in our Linux server (PIX Firewall, Switch, Router, Bluesocket log files from remote devices)
• Wrote a scripts (shell/perl/php/expect) to automate daily monitor/maintainance. Use expect script to backup all the Cisco router and Switch configuration files our tftp server.
• Implement high fault tolerance server by using disk mirror, Raid 5, Hardware RAID-10, Hot Swap, Redundant power supply system.
• Setup/manage all type of printers(CUPS/LPRng) running in UNIX/Linux servers. Create printer filter for business.
• Printer include: Richo, Xerox, HP, Lexmark Optra 7614, Dot Matrix Printer, etc. Use WebJet Admin to manage HP printer
• Support Legato backup/CommVault backup server. Restore user’s lost emails, email alias, user account and home directory.
• Check server room light status on the daily base. Install PowerChute to avoid data loss or corrupt due to improper shutdown.
• UPS(APC), I can use APC web interface to remote power cycle server in case we need.
• SAN: EMC Clariion storage system, Setup Promise VTrak E610.
• Use HyperTerminal configure Promise VTrak E610, Lantronix Box (setup IP address, default gateway)..

UNIX/Linux System Administrator

Confidential, East Brunswick, NJ

Responsibilities:

• Administer the DNS Servers, Add new domains, MX record, A record, CNAME record, PTR record.
• Set round robin for web servers. Make reverse delegation for Our clients’ DNS servers. Fix all the DNS related problems.
• Administer Apache Servers. Published client’s web site in our Apache server, upload web site to Apache server.
• Manage Sendmail 8.9 Servers, set up sendmail masquerading.
• Resolve users’ email problems (i.e. mail box full, cannot send email out, open-relay, block spammer’s mail servers, etc.)
• Fix all the system problems, disk space issue, backup issue, network issue, etc
• Wrote scripts to make them running in background to monitor server health (DNS server, Apache server, Sendmail server).
• Upgrade software, add patches, add new hardware in UNIX machines.
• Use Visual Basic, SQL language to write an application, created database for all the IP addresses with Access database, with ODBC to make this application access our database.