Professional Summary:

• Experience in scheduling or executing scripts via background scheduler or Cron.
• Experience with Git.
• Experience in troubleshooting and resolving network issues related to the servers.
• Experience with configuration management tools like puppet and satellite server.
• Proficient working with TCP/IP, DNS, DHCP, NFS version 2/3/4 , NIS, NIS , SAMBA, LDAP, SSH, SSL, SFTP, SMTP, SNMP, SAN, NAS.
• Experience with configuring firewalls using Linux. Familiar with configuring advanced features such as NAT, port redirection, and logging.
• Hands on experience in creating, maintaining user profiles, security, rights, Backup of data and Disaster Recovery.
• Experience in setting up Veritas volume manager VxVM and Veritas cluster server environment.
• Experience in installing and configuring the mail servers like Sendmail 8.13, 8.14.x and Postfix 1.x, 2.x.
• Experience in Managing VMware Vcenter and it's VM's.
• Experience in administering Vsphere 4.0.
• Experience in Netapp 7-mode and c-mode and ONTAP 7.x, 8.x.
• Have Ability to interface with users at all levels of the organization and good end-user support skills.
• Have tested various Linux Environments in the Development/Test Stages to help create a better standardized environment and resolutions of any problems if any occurred.
• Experience with Linux systems administration like Kernel Tuning, Application Tuning and Standard Administration.
• Good experience in setting up of RAID0, RAID1 mirroring and RAID5 for data redundancy using Veritas Volume Manager VxVM and Veritas File System VxFS .
• Experience managing volumes/file systems using Logical Volume Manager LVM , Solstice Disk Suite Solaris Volume Manager and Veritas Volume Manager VxVM 3.x, 4.x, 5 and also configured volumes/filesystems through network using NFS, NAS, SAN methodologies and installed RAID devices.
• Comfortable with installing, upgrading and configuring Red Hat Servers using Kickstart and Solaris Server using Jumpstart and customizing the Kickstart and Jumpstart scripts to automate the installation of various servers.
• Experience in Installation, configuration, Administration and Supporting of RHEL 4, 5.x, 6.x SUSE Linux Enterprise Server SLES 11.x, 10.x, 11i Solaris 8, 9, 10, 11 AIX 6.1, 5.3, 5.2,Windows Server NT, 2002, 2003, 2007, 2008, 2010.
• Experience with a variety of hardware platforms like Dell, HP, IBM Blade Chassis, Cisco UCS, DL360, DL560, etc.
• Strong experience working with various Development Test teams in a dynamic organization environment.
• Around 8 years of experience in System Administration working on Red Hat Enterprise Linux RHEL , Cent OS, Ubuntu, Sun Solaris, SUSE, AIX, HP-UX and windows environment.
• Solid knowledge of Linux kernel internals, some experience building customized kernels and customized RPM packages.
• Comfortable performing system upgrades, installing layered products, and analyzing and troubleshooting complex production systems.
• Familiar with Red Hat Network RHN and Red Hat Network Satellite for operating system upgrade or maintenance.
• Experience in implementing technologies such as: Apache, Tomcat, JBoss, Web Sphere including reverse proxy and modules.
• Experience in storage technologies like NetApp and EMC storage.
• Experience in Shell scripting using sh, ksh, bash and python.
• Familiar with Installation, configuration of Packages, Security Fixes and Patches using Red Hat Satellite Server.
• Good at handling routine maintenance with latest Security updates and software update.
• Installation and configuration of web hosting administration such as FTP, SSH, RSH, Telnet, and HTTP.
• Strong knowledge of system performance and monitoring tools such as CA Unicenter, sar, dstat, iostat, vmstat, etc.
• Good Verbal and written communication.

Technical Skills:

• Operating Systems: Red Hat Enterprise Linux 3.x/4.x/5.x/6.x, Ubuntu 12.x/13.x/14.x, Solaris 7.x/8.x/9.x/10.x, AIX 4.x/5.x, HPUX 10.x/11.x, Windows NT/2002/2003/2007/2008/2010.
• Hardware: HP Blade servers, HP Proliant DL360G2, DL360G5, DB380, DL385 and DL560 DELL Poweredge 1350, 1750, 1850, 2850, 6450 Sun Enterprise M3000, M5000 Sun Fire X2-2/X3-2/X4-2/X4-4 HP-UX 11, V440, V490, V880, V890, V240R IBM P595F IBM X Servers X220, X240, X2950, X3200, X3400, X3550, X3650, X3650M2, X3650M3, X3650M4, X3850 Sun StorEdge A1000, A5000
• Web/Application server: Apache 1.x/2.x, Tomcat 6.0/7.0/8.0, MQ series, Weblogic 8, JBoss, IIS, Sendmail, Postfix, Squid, Samba, WebSphere 4.x/5.x, DNS
• Backup Management: Veritas Netbackup 4.x/5.x/6.x
• Monitoring Tools: Nagios, solar winds, Munin, Cacti.
• Language: SQL, XML, Python, Korn, Bash Shell Scripting.
• Virtualization: VMware 3.5/4.1, Vsphere4.x/5.x, Vcenter.
• Volume Managers: Logical Volume Manager, Veritas Volume Manager, Solstice Disk Suite Solaris
• Volume Manager
• File System: VxFS, UFS, Ext, Ext2, Ext3, Ext4, ZFS.
• Networking: TCP/IP, UDP, LAN, WAN, NFS version 2/3/4 , NIS, LDAP NIS , DNS, DHCP, NAS, SAN.

Cluster Environments: RedHat Cluster Services, Veritas Cluster Services 3.x/4.x, Sun Cluster Services

Confidential

Linux/Unix Administrator

Responsibilities:

• Developed BASH shell script to automate day to day system admin tasks.
• Configure storage using Veritas volume manager for Veritas servers.
• Securing services using TCP wrapper, IP Tables and SE Linux.
• Assist developers and project managers for technical assistance and contribute to the projects to upgrade, migrate infrastructure systems and services.
• Installation, configuration and Operating System upgrade on, Red Hat Linux 5.x, 6.x, Ubuntu 13.x, 14.x and Windows 2008, 2010.
• Performed server installation using Kickstart, Network, and DVD on physical servers, VMware.
• Build new Virtual machine and physical server.
• Managing the VMware ESX and ESXi server 5.5, 5.1, 4.0.0 and 3.5.0 based on requirement.
• Upgrading from VMware ESX server from 3.5.0, 4.0.0, and 5.0 in environment.
• Install and configure the hardware agents on the ESX servers for Hardware monitoring and alerts SNMP Open Manager .
• Cloning, Creating Templates and taking Snapshots and recovering when needed.
• Install and configure DNS, DHCP, NFS, NIS NIS .
• Reallocate system resources as necessary, optimize systems performance, and recommend additional components to improve overall performance.
• System OS patching and security hardening.
• Install, configure, update, and troubleshoot web servers like Apache, Tomcat.
• Install, configure, update, and troubleshoot mail servers such as Sendmail, Postfix.
• Worked on A1000 StorEdge storage disk arrays and configured in RAID 0, 1 and 5 levels. Good knowledge in RAID concepts.
• Responsible for the proper functioning of the systems and all supported applications.
• Reviewing of system and application logs, and verifying completion of scheduled jobs such as backups.
• Install and configure various services like DHCP, NFS, DNS, Apache Web Server, NIS, LDAP, Samba, JBoss, Web Sphere, SSH, FTP/SFTP, Sendmail/SMTP, Telnet, Web logic, RPM Package Management, File System Management.
• Monitoring the hosts and networks using sar, dstat, Iostat, VMstat, MPstat, netstat, ethtool and Other Tools.
• Setup logrotate for applications logs and system logs.
• Managing package install/upgrades using YUM and RPM.
• Support Unix system administration tasks, including patch management and operational support
• Regular backing up of critical data and restoring backed up data. Worked in solving tickets issued on day to day activities and problems related to development and test servers.
• Managed various file systems using LVM and also configured filesystems through network using NFS, NAS, SAN methodologies.
• Hands on with Netapp, ONTAP 8.x in NAS with 7 mode and cluster mode.
• Modifying user's password policies, group policy, UID and GID assignment policies.
• Scheduling jobs through cron - frequent modification to crontab.
• Used Puppet Master to keep in sync configuration on hosts running agents.
• Created a FTP web interface to manage and send files to our customer FTP site using PHP.
• Install, configure, update, and troubleshoot database servers like MySQL,Oracle9i/10g/11g
• Participate in testing of new tools, applications, and releases provide appropriate feedback for tool improvement.

Environment: Red Hat Linux 5.x,6.x, Ubuntu 13.x,14.x, Windows 2008,2010, VMware ESX 3.5, Veritas Volume Manager VxVM , Veritas Cluster Server, HP Blade servers, HP Proliant DL360, DL560 DELL Poweredge 1850, 2850, 6450 Sun StorEdge A1000, A5000, Apache 2.2/2.4 ,Tomcat 6.x/7.x, Sendmail, Postfix, Netapp, ONTAP, TCP/IP, NFS, NAS, SAN, RAID, Web logic 8.1, Samba, JBoss 6.x/7.x, Oracle 9i/10g/11g, YUM, RPM.

Confidential

Linux/Unix Administrator

Responsibilities:

• Worked with engineering team to resolve tickets related to engineering issues like firewall change requests.
• Monitored the systems CPU, memory, IDE/SCSI disks, disk controllers, RAID, RAID controllers, file systems, and network parameters using the tools NAGIOS system monitoring tool and BMC performance management tools.
• Veritas Netbackup troubleshooting using remote tools and commands.
• Work with storage team and application team to ensure the storage allocation and design is done at initial construction time.
• Drafted shell scripts for automated installations, to extract logs.
• Hands on with EMC storage.
• Migration of applications from older Sun/Solaris hardware over to HP blade environment running Red Hat Linux RHEL 4, 5, and 6. P2V migrations of hardware servers to VMware environment running on ESX V4.1 servers HP Proliant hardware .
• Performed Installation, configuration of RHEL 5, Solaris and AIX operating systems.
• Actively Involved in Building and configuring of red hat Linux and Solaris 9/10 servers remotely using Jump Start /Kick Start Servers.
• Installation, configuration and management of SAMP Solaris/Apache/MySql/PHP and LAMP Linux/Apache/MySql/PHP stacks.
• Maintained a secure hosting environment with latest certified Prism-CMS software, security patches, and software updates and upgrades to database, and application tiers.
• Creating templates, cloning Linux Virtual Machines and migrating servers between ESX hosts.
• Making Kernel upgrades for Linux.
• Setup and management of SFTP server for file transfer services.
• Implemented chroot jailing for users to have restricted access to the SFTP server.
• Provided support for JBoss 5.x and apache 2.0 application for operation related to installation and configuration.
• Worked with Database administrators to tune kernel for Oracle installations on Linux.
• Integration of more than 500 Linux servers to authenticate using Windows Active Directory using Winbind and Samba.
• Managing DNS for external and internal domain Sendmail Relay Server for outgoing mails.
• Creating Zones, containers, LDOMs on Solaris servers, creating zpools, ZFS file system installing Oracle, Java based applications on them.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding NAS storage on 2, 3, 4 node clusters.
• Designing Firewall rules for new servers to enable communication with application, Oracle 10g servers.
• Setting up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents, DHCP and Proxy.
• Install/troubleshoot AUTOSYS to schedule application jobs.
• Generated detailed documents and reports on issues and solutions for future reference.

Environment: RHEL 4.5/5.0, Solaris 8 /9, Windows 2007/2008/2010, Veritas Volume Manager VxVM , Veritas Cluster Servers, Veritas Net backup, IBM X Servers X3400, X3550, X3650, X3650M2, TCP/IP, NIS, NFS, DNS, SNMP, DHCP, Apache 2.0, NAS, Oracle 10g, Oracle RAC, Samba, Winbind, JBoss 5.x.

Confidential

Linux administrator

Responsibilities:

• Installation of Red Hat Enterprise Linux 4.x, 5.x using Kickstart and PXE on HP Blade Servers.
• Installing, Configuring and Upgrading of the Cent OS 5.x.
• Able to configure and Install Fedora core 2 having kernel 2.6.
• Performed support role for applications on mission critical Enterprise Networks and Multi-server environments.
• Troubleshooting various issues on ssh, ftp, telnet etc.
• Implementations of automatic secure SSH Login, User and Group administration.
• Configured Printers, Print Server and Print Clients using commands like lp, lpstat, lpadmin, lpfilter GUI.
• Updated firmware on HBA cards like qlogic and installed it on HP DL, C7000, PE Dell R410, R610 servers.
• Virtualized Linux servers and deployed automated tasks using BMC Blade Logic Server Automation Suite.
• Samba NFS file Server for sharing files on multiple clients.
• Patch and package administration for installation of patches as per the company policy and installation of packaged application.
• Configured iptables on Linux servers.
• Implemented Spacewalk Open Source Red Hat Satellite Server System management application for auto provisioning, software grouping, custom package channel, system inventory, auto deploying patches and monitoring of Red Hat Servers.
• Swap space administration.
• Responsible for developing and planning the implementation of technical downtime and recovery processes and the technical setup of downtime systems.
• Data Warehousing and System Backup using tar, cpio for local systems.
• Experience scheduling jobs with ControlM and Cron.
• Worked on POSTFIX mail server running on Red Hat Linux.
• Remote system administration using tools like SSH, Telnet, and Rlogin.
• Implemented open source base monitoring tool Nagios 3.0 for servers, SAN switches, EMC SAN Storage and VMware ESX and ESXi.
• Day to Day activities included handling security issues like stale UNIX account cleanups, 90 day password changes, setting max age and min age, creating a list of umask permission for various users.
• Ensuring data redundancy with RAID implementation.
• Shell and perl scripts to automate daily repetitive activities.
• Build Apache2 web server in Solaris and Apache in Red Hat, FTP and NFS.
• Open ports for applications and process that require special ports.
• User, Group management for all the UNIX servers.
• Network trouble shooting using ndd, traceroute, netstat, ifconfig and snoop.
• Do documentations and system training to teammate and lower tier support.

ENVIRONMENT: Red Hat Enterprise Linux 3.x/4.x/5.x , Cent OS 5, Fedora core 2, Apache2.0, Postfix, BMC Patrol, RAID, HP DL, C7000, PE Dell R410,R610, VMware ESX Server2.x, RAID, FTP, NFS.

Confidential

System Administrator

Responsibilities:

• Installing Configuring Linux, Sun Solaris, AIX operating systems Windows2007/NT.
• Built new servers using Custom jumpstart installation and Kick start.
• Planning of OS upgrades for existing infrastructure.
• Planning and Implementation of Kernel patches on Solaris and Linux Servers.
• Configuring Managing disks using LVM on Linux and AIX.
• TCP/IP Configuration like assigning IP addresses, configuring network interfaces, assigning static routes, hostnames etc.
• Management and Troubleshooting of NIS and NFS and other servers.
• Securing services using TCP wrapper, IP Tables and SE Linux.
• Extensive experience in installing, integrating, tuning and troubleshooting Apache, Tomcat, WebSphere and Weblogic application server.
• Creating and managing VERITAS volume manager VxVM and Veritas cluster services.
• Performed capacity analysis, monitored and controlled disk space usage on systems.
• Storage setups, RAID, Logical Volume Manager, system backup design and disaster recovery.
• Configuring the backup devices DAT and LTO.
• Network traffic control, IPSec, Quos, VLAN, Proxy, Radius integration on Cisco Hardware via Red Hat Linux Software.
• Creating User accounts, Mail account, groups, printer etc.
• Repairing the corrupted file system using FSCK.
• Installing and configuration of IIS, Apache, and Samba.
• Installation and configuration of Oracle 7.x/8.x/9i.
• Integration of Windows 2000/NT with various UNIX servers/workstation using NFS Samba.
• IBM PowerVM and VIOS installation and configuration.
• Review server loads and recommend load balancing for optimization.
• Plan, design and implement LPAR layouts and disk allocations as requested.
• Worked on Solaris volume manager to create file systems as per user and database requirements.
• Responsible for DNS server management, User disk quota management, Projects quotas management. Trouble shooting the problems regarding NIS and DNS.
• Support the PeopleSoft/Weblogic team by helping in the OS and Application upgrades and installation of new SSL certificates for Weblogic8.1.
• On-call support using the Remedy Ticket System for routine system administration issues.

Environment: IBM RS/6000, RHEL 3.x,4.x, Windows 2007/ NT, HP Proliant DL360G2, DL360G5 IBM X Servers X220, X240, X2950, X3200, X3400,LVM for Linux/AIX, DNS, Apache 2.0, Sendmail, NFS, Kick Start, Oracle 7.x/8.x/9i, Veritas volume manager VxVM , Veritas cluster services, Weblogic8.1, RAID, Iptables, IIS, Squid, and Samba.

Confidential

Systems Administrator

Responsibilities:

• Installation, configuration and administration of Red Hat Linux servers and support for Servers.
• Provided 24x7 System Administration support for 300 Red Hat Linux 3.x, 4.xservers and resolved trouble tickets on shift rotation basis.
• Configuration of Hardware and Software RAID on Digital Sun Servers.
• Kernel tuning, Writing Shell scripts for system maintenance and file management.
• Used lilo and fsck to resolved server issues using rescue mode, and single user mode.
• Shell scripting for database startups, backups using bash shell scripting.
• Monitoring system resources, logs, disk usage, scheduling backups and restore.
• Setup Clustering for Linux servers.
• Installation and configuration of Oracle 7.x/8.x.
• Creating templates, cloning Linux virtual Machines and migrating servers across ESX hosts.
• Managing HP-UX, Compaq and Linux workstations and servers.
• Configured and Administering NFS and NIS on Sun Solaris server environment.
• Responsible for preparing architectural flow diagrams and presentations.
• Day to day ticket resolving submit CRQ based on user requirement.
• Set up Quotas for the user accounts limiting the disk space usage.
• Responsible for scheduling jobs using crontab and at.
• Responsible for configuring and managing Squid server in Linux.
• Rpm management using Opsware.
• Install and support user requested rpm's whenever it is required.
• Perform day to day Linux administration such as user accounts, logon scripts, directory services, file system shares, permissions.
• Setting up user quota and SUID, SGID, STICKY BIT.
• Troubleshooting Backup and Restore problems Creation of LVMs on SAN using Linux utilities
• Configured Sendmail.
• In day to day activities have done all the Veritas Volume manager VxVM activities like extending the file system , Creating new file systems, configuring the volume manager, Initializing and encapsulating the disks, Mirroring the disks and applying raid5.
• Creating LDOMs, installing Solaris, creating volumes, installing packages.
• Wrote Technical documentation for various projects and worked with Technical writer to finalize the documents.

Environment: Red Hat Linux 3.x, 4.x,Solaris 8 OS, HP-UX 11, V440, V490, V880, V890, V240R, JBODs Compaq servers and SUN fire 6800K , SENDMAIL, SAN, Veritas Volume Manager 3.4, Veritas Net backup, Squid, Oracle 7.x/8.x