PROFESSIONAL SUMMARY:

• 8 years of experience in System Administration working on Linux, Solaris and SuSe environments.
• Installing, configuring, supporting & maintenance of Red Hat Linux 4.x/5.x/6.x and
• SuSe Enterprise servers.
• Installing, upgrading and configuring Solaris 8, 9 & 10 on Sun servers using Jump Start and Interactive Installation.
• Proficient in managing and troubleshooting User accounts, Group accounts and system security in Red Hat Linux and Solaris.
• Expertise in system performance tuning and capacity planning.
• Extensive experience with operating systems, network protocols, system programming and configurations.
• Good experience in setting up of RAID0, RAID1 (mirroring) and RAID5 for data redundancy.
• Installed and setup RHEL for web application servers like WebSphere, WebLogic, Tomcat, apache and Oracle databases, RAC environments.
• Created KVM guest operating systems on a Red Hat Enterprise Linux.
• Worked on Disk and File system management through Red Hat GFS and other logical volume manager for other flavors of UNIX.
• Extensive experience in writing and troubleshooting scripts in shell, perl and python languages.
• Worked on OS migrations, upgrade, BIOS and NIC firmware upgrades.
• Expert in Patch and Package Installation and firmware up gradation.
• Installation and upgrade of Software and Patches, configuration management, version control, service pack and reviewing connectivity issue regarding security problem.
• Installed RPM packages on Red Hat Linux Servers, updated with the help of YUM and Up2date.
• Monitoring system resources, logs, disk usage, scheduling backups and restore.
• Enabling cron jobs and scripts to automate tasks required for optimizing operations.
• Good in file - system management, disk management, disk utilization, service management, device management and memory management.
• Experience in configuration of Auto mount, Send mail, FTP, remote access, Active directory, Security management and security troubleshooting skills.
• Extensive experience in Databases, Clustering, Firewalls and cross-platform tools like SAMBA.
• Experience in installation of Oracle, MSSQL Server and MYSQL.
• Working knowledge of VMware (Virtualization).
• Experience on SAN and NAS connectivity.
• Worked with in SLA, production and 24/7 environments and on call pager support.
• Excellent communication skills, hardworking and fast learner.
• Interactive with various vendors for procurement, support and troubleshooting.

TECHNICAL SKILLS:

Operating Systems: Linux (Red Hat, CENTOS & SUSE), IBM AIX 5.x, Solaris 10/9/8, SLES 8,9,10 & 11, Ubuntu 12/13, Windows NT /2008/2010

Networking: TCP/IP, NIS, NFS, DNS, DHCP, Cisco Routers/Switches, WAN, SMTP, LAN, FTP/TFTP

WEB Technologies: Tomcat, APACHE 2.x, 3.x

Programming& Databases: MySQL, MSSQL, C, UNIX Shell Scripting, Perl Scripting, HTML, Perl, VB

Tools: SVN

Scripting: Bash, shell, Python

FUNCTIONAL:

• Mapping requirements and providing customized software solutions involving finalization of product specifications and selection of appropriate techniques.
• Conducting system study and coordinating with team members for System Design & Integration, Application Maintenance, etc.
• Handling various technical aspects like server Installation, monitoring critical Paths & taking appropriate actions.
• Managing smooth implementation of projects at clients’ location.
• Extending post-implementation, application maintenance and technical support to the client.

PROFESSIONAL EXPERIENCE:

Confidential, Woonsocket, RI

LINUX System Administrator

Roles and Responsibilities:

• Installation, Configuration & Administration of SUSE SLES 11.x & 12.x Operating System running on IBM Blade Center S HS12 & HS23 & HP DL360G9s.
• Installing System updates via RPM/YaST/Zypper.
• Linux OS Management that includes sudo, cron, syslog/rsyslog, setting file permissions, MBR partitioning, GRUB, GRUB2, GPT partitioning, troubleshooting boot issues, boot alternate operating systems, and boot alternate disks.
• Building and maintain VMs builds using KVM/QEMU.
• Creation of virtual machines and OS installation on VM guests.
• Allocating resources to virtual machines using virt-manager or building VMs using customized xml files, templates and cloning, configuration of data stores, network bonding, configuring pass-through devices.
• Expertise in LVM that includes add/expand/configure disks, disk partitioning with FDISK & PARTED.
• Extensive working experience on BASH scripting - functions/loops/command line arguments.
• Usage of AWK, SED, PERL, pipes, regular expressions and script debugging.
• Configuration of network interfaces and respective system files.
• Troubleshooting network connectivity issues using ping, traceroute, tcpdump, net stat, sockets, routing, and firewalls/iptables.
• Installation and configuration of SQUID proxy server.
• Backup/Restore of MySQL/Maria DB and simple SQL queries.
• Installation and configuration of APACHE Web Server. Integration with TOMCAT.
• SSL certificates, configuration of virtual hosts, security considerations, generating key files, CSRs and self-signed certificates.
• NTP configuration, validation, peers, servers, & synchronization.
• NFS sharing files/directories, with security considerations.
• Troubleshooting disk failure, file system and network failure.
• Experience working with Subversion SVN control systems.
• Management of host based firewall rules (iptables)/custom firewall rules.
• Reviewing/validating firewall rules change requests before/after implementations.
• Downloading, testing, deploying, applying patches in a timely matter.
• Experience working with security analysts to ensure systems meet compliance requirements.
• Worked on Store Disaster Recovery Processes, Encryption and OS Upgrade Projects for CVS Pharmacy Stores.
• Programs developing to automate the project process to implement on all stores.
• Act as Level 3 Support to all store issues that get escalated to our queue.
• 24X7 On-Call Production Support rotation on a regular basis for day to day server issues of 10,000 stores all over US.

Environment: SUSE SLES 11.x/12.x, IBM Blade S HS12/23, HP ProLiant DL3860G9, Logical Volume Manager, KVM/QEMU, APACHE, TOMCAT, Maria DB, MYSQL, SVN.

Confidential, Washington DC

Linux Administrator

Responsibilities:

• Installation, configuration and Operating System upgrade on Sun Solaris 8,9,10 and Red Hat Linux 4.0 on sun Servers & HP-Dl585 servers.
• Installation of Oracle-8i Server, Oracle Client Software on the application server and configuring the connectivity using JDBC drivers for the DB. Troubleshooting the connectivity from the Application to DB, maintenance of the DB’s in server.
• Installed of all the required Software, patches, documentation, licensing trouble shooting.
• Used Symantec Enterprise Security Manager for system integrity check on newly build servers.
• Supported Bugzilla, Media Wiki, SVN running in Red Hat Enterprise Linux.
• Performed Red Hat Linux kernel, memory upgrades and undertook Red hat Linux Kick start installations.
• Installation of Oracle Patches and Troubleshooting, Creating and modifying application related objects, Creating Profiles, Users, Roles and maintaining system security.
• Managed Red Hat Linux kernel, memory upgrades and swaps area. Red hat Linux Kick start Installation.
• SENDMAIL configuration and administration, testing the mail server.
• Involved in making the new builds Infrastructure Ready, Application Ready & Production Ready.
• Managed server nodes running Red Hat Linux, for application bioask.com.
• Used internal tools like ESM, Opsware Server Automation, Tideway.
• Co-coordinating with team members to push the newly builds into production on the said time-line.
• Wrote bash and Perl scripting for automation purpose.
• Implemented Virtualization using VMware in Linux servers.
• Red Hat Linux kernel, memory upgrades and swaps area. Red Hat Linux Kick start Installation Sun Solaris Jump start Installation. Configuring DNS, DHCP, NIS, NFS in Sun Solaris 8/9& other Network Services.
• Formatted raw disks & partitioned them using the format utility. Created file system using newfs and mounted it. Created devices and special files using mknod.
• Network Monitoring Using Nagios tool.
• Setup various user profiles, environment variables/security to ensure smooth operation.

Environment: Red hat Linux 4.0, Sun Solaris 8,9 Sun T2000, Solaris Volume Manager, Solstice Disk Suite, Veritas Cluster Server, Enterprise Security Manager, Opsware, Web logic 8.1.

Confidential, Roseville, CA

System/Linux Administrator

Responsibilities:

• Performed installation, configuration and maintenance of Red Hat Linux4.x, 5.x, 6.x.
• Provided 24x7 System Administration support for HP-UX/10.x/11.x based servers and Red Hat Linux 4.x, 5.x, 6.x servers and resolved trouble tickets on shift rotation basis.
• Wrote bash script for getting information about various Red Hat Linux servers.
• Maintaining CPU, Memory resources on Micro partition VIO Server’s and Client’s environments.
• Worked on EMC disk storage to allocate disk space.
• Creation of LVM’s on SAN using Red Hat Linux utilities.
• Experience in Servers consolidation and virtualization using VMware virtual infrastructure, VMware ESX.
• Installed and maintained IBM Tivoli Storage Manager (TSM) for Backups and data storage.
• Monitored overall system performance, performed user management, system updates and disk & storage management.
• Performed daily backups, restoration of data as per requests from developers using Veritas NetBackup.
• Performed Red Hat Linux kernel, memory upgrades and undertook Red Hat Linux Kick start installations.
• Created users, manage user permissions, maintain User & File System quota on Red Hat Linux and AIX.
• Performed troubleshooting, tuning, security, backup, recovery and upgrades of HP-UX/10.x/11.x Red Hat Linux4.0/3.0/9.0 based systems.
• Production support of Apache and JBoss including installation, configuration, management and troubleshooting.
• Setup of full networking services and protocols on UNIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, TCP/IP, ARP, applications, and print servers to insure optimal networking, application, and printing functionality.
• Installed and configured Sudo for users to access the root privileges.

Environnent: HP-UX/10.x/11.x, RedHat Enterprise Linux 4.x/5.x, SUSE Linux 9/10, Tivoli storage Manager, Oracle 9i, Logical Volume Manger for Linux and VMware ESX Server 2.x, Samba 3.0, Veritas NetBackup, Apache 2.0, HACMP, HMC, ILO, RAID, WebLogic, HP DL585.Hitachi disk Arrays, JIRA, XML,, Anthill Pro, Web Servers.

Confidential, Montvale, NJ

System/Linux Administrator

Responsibilities: 

• Installed, maintained and upgraded RedHat Linux and Solaris Servers using kickstart based network installation. 
• Installation and Configurations of RedHat Linux 6/5, AIX Maintenance & System Administration.
• Configured and administered multiple production Red hat 4/5/6 servers across multiple platforms. 
• Monitored the systems and administered Servers for day-to-day problems, patches, user administration, and hardware failure, monitoring log files, backup, configuration changes and documentation. 
• Perl development to interact with LDAP (AD) servers to query & modify person, host & netgroup data. 
• Installation, setup, configuration, security administration and maintenance for flavours of servers. 
• Worked closely with SAN team and allocated storage to the server and shared with its cluster nodes. 
• Most of these tasks are performed using native Korn Shell and Perl scripts system resources from one partition to another partition. 
• Preparation and execution of server patching and upgrade on more than 5000 servers including AIX, Solaris and RedHat Linux servers. 
• Configured the yum repositories for installing and updating the packages on the RedHat Linux. 
• Experienced in configuring and maintaining System Securities using IPTABLES. 
• Experienced in networking with LAN, WAN, Routers, Gateways, etc. 
• Working on Volume management, Disk Management, software RAID solutions using VERITAS Volume manager. File system Tuning and growing using VERITAS File System (VxFS). 
• Configured, maintained, applied changes and fail-over schedules of HA servers running Veritas Cluster Server and Red hat Cluster Server. 
• Coded various Perl/Shell scripts to automate backup and recovery. 
• Expert in setting up SSH, SCP, SFTP connectivity between Linux hosts. Experienced in DNS, NIS, NFS, CIFS, FTP, NIS, Samba Server, LDAP, remote access, security management, and system troubleshooting skills. 
• UNIX Shell/Perl scripting for job automation. Creating zones for application. 
• Created ZFS file system in Solaris 10 using Zpool and ZFS and created Veritas file systems 5.0, RAID 0, 1, 5 volumes. 
• Implemented Oracle RAC high availability application cluster on RHEL 4.5. 

  Environment: Linux instances, AIX Servers, IBM-Blade Centre (Chassis Blades HS23, HS-22 & Racks), HMC V7R7.7.0, ILO, KVM, RHEL 7/6/5, VMware-vSphere.

Confidential

System/Linux Administrator

Responsibilities:

• Performed installation, configuration and maintenance of Red Hat Linux4.x, 5.x, 6.x.
• Provided 24x7 System Administration support for Red Hat Linux 4.x, 5.x, 6.x servers and resolved trouble tickets on shift rotation basis.
• Installation of Red Hat Linux 4.x, 5.x, 6.x using Kick start installation.
• Wrote bash script for getting information about various Red Hat Linux servers.
• Worked on DM-Multipath to determine SCSI disks to corresponding LUNS.
• Creation of LVM’s on SAN using Red Hat Linux utilities.
• Experienced in Servers consolidation and virtualization using VMware Vsphere Client and Citrix Xen.
• Worked on Migrating servers from one host to other in VMware, Xen.
• Worked on Migrating servers from one datacenter to other in VMware VSphere Client.
• Working knowledge of Hyper-V virtualization on Microsoft Windows 2008 platform.
• Monitored overall system performance, performed user management, system updates and disk & storage management.
• Performed Patching in the Red Hat Linux servers and worked on installing, upgrading the packages in the Linux systems.
• Performed Red Hat Linux kernel, memory upgrades and undertook Red Hat Linux Kick start installations.
• Created users, manage user permissions, maintain User & File System quota on Red Hat Linux.
• Performed troubleshooting, tuning, security, backup, recovery and upgrades of Red Hat Linux based systems.
• Setup of full networking services and protocols on UNIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, TCP/IP, ARP, applications, and print servers to insure optimal networking, application, and printing functionality.
• Installed and configured Sudo for users to access the root privileges.

Environnent : Red Hat Enterprise Linux 4.x/5.x, Oracle 9i, Logical Volume Manger for Linux and VMware ESX Server 2.x, Apache 2.0, ILO, RAID, VMware VSphere Client, Citrix Xen.