SUMMARY

• Over 6 years of experience in Red Hat Linux 4.x/5.x/6.x/7.x, Oracle Enterprise Linux (OEL) and Windows 2008/2003 administration.
• Strong experience in System Administration, Troubleshooting, Security, Backup, Disaster Recovery, Performance Monitoring on Red Hat Linux Systems.
• Good experience in installation, configuration and troubleshooting networking concepts like NIS, NFS, Samba, Send mail, HTTP, LDAP, SSH, SFTP, SMTP, SNMP,CRONTAB.
• Experience in Backup, Job Scheduling, and Troubleshooting TCP/IP network problems.
• Configuring, Managing and Scheduling CRONJOBs for App Accounts and Backup management.
• Installing RPM packages on Red Hat Linux Servers, updated wif the halp of YUM and Up2date.
• Actively involved on providing User permissions wif the halp of Net groups and posix groups.
• Working wif limits.conf for restricting applications users to use resources.
• Basic knowledge on Unix Shell Scripting - Bourne Shell Scripting.
• Installing and configuration of Web hosting administration TELNET, FTP, SSH, & RSH.
• Installing and configuring DNS and DHCP. Experienced in creating and configuring Forward Lookup Zone and Reverse Lookup Zone.
• Supported various databases like Oracle, UDB, SQL Server including Oracle RAC (Real Application Cluster) running Unix/Linux server.
• Working experience in using configuration management and automation tools like Puppet/Chef/CFEngine and cobbler for automating configurations and maintaining stability across several hundred machines.
• Working wif SAN team for exporting shared volumes and mounting shared volumes.
• Good knowledge on RAID groups and setting up NFS, CIFS and iSCSI protocols in SAN/NAS environment on RedHat. Good in capacity planning, recommending hardware for SAN implementation and replacements.
• Working wif Autosys team for regular installations and troubleshooting.
• Working wif HP XEN Blade Servers. Attaching disk space from DL-360 blade servers to VMs.
• Involved on setting up pseudo access for application accounts.
• Good experience in making application accounts password less SSH.
• Configuring, managing SELinux (Linux Firewalls) and allowed appropriate ports wif halp of IPTables.
• Working on SAN storage technologies using iSCSI TARGET and Network Storage Systems like DAS, NAS.
• Creating and maintaining users, profiles, security, rights, disk space and process monitoring.
• Experience in Patch and Package Administration, Performance Tuning, monitoring on UNIX.
• Experience in User Administration. Creating and maintaining user accounts, profiles, permissions, security rights, disk space and process monitoring.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding storage.
• Working experience wif cloud infrastructure of AWS (Amazon Web Services) and computing AMI virtual machines on Elastic Compute Cloud (EC2).
• Experience in implementing and configuring of Logical Volume Manager (LVM) for RHEL/SuSe, Solaris Volume Manager (SVM), VERITAS Volume Manager (VxVM).
• Good knowledge on WAS fix packs, intern packs, SSLs and Global security.
• Experience in working wif Data Center spanning servers on 24/7 and on-call Production environment.
• Experienced in maintaining daily backups of the servers, archiving of backups and restoration of data.

TECHNICAL SKILLS

Operating Systems: RedHat Linux (3/4/5/6), Cent OS 6.7, oracle Solaris 9/10, VMware, Windows 08/07/2003/XP/NT/9x

Utilities: NFS,NIS,NIS+,DNS,TCP,IP,SSH,FTPD,SFTPD,HTTP,LVM,Sendmail(SMTP),VMwareServer,VPN,MirrorDisk,svcs,LDAP,Crontabs,sed,awkPerformance management

Cluster Solutions: Redhat Cluster Suite, Sun Cluster 3.0/3.1

Storage: Tivoli Storage Manager, Storage Area Network (SAN), NAS

Tools: MobaXterm,WINSCP,putty,Xshell,Sametime,RemedyActionRequestSyste,MonitoringTool.

Office Tools: Microsoft Office, MS Word, MS Excel, MS Power Point, MS Outlook.

PROFESSIONAL EXPERIENCE

Confidential, Windsor, CT

Sr. Linux Engineer

Responsibilities:

• Installing new or rebuilding existing Servers on Oracle Enterprise Linux and configuring hardware, peripherals, services, directories, storage as per the standards and project requirements.
• Working wif networking team to add New VMs to VLANs, wif SAN team for exporting Shared volumes and DNS team for adding VMs to Fully Qualified Domain.
• Deployment and management through AWS cloud formation on EC2 instances and also maintaining amazon S3 storage.
• Working wif net groups and posix groups for user permissions.
• Working wif limits.conf for restricting applications users to use system resources.
• Creating application accounts, SCP only accounts and adding app accounts to respective groups.
• Creating volume groups, Logical volumes and mounting on mount point as requested by user.
• Working wif HP XEN Blade Servers. Attaching disk space from DL-360 blade servers to VMs.
• Working wif SAN team for exporting shared volumes and mounting shared volumes.
• Performance monitoring using SAR, Iostat, VMstat and MPstat on prods dev and Test servers.
• Creating VMs on Cloud stack and attaching disk space from cloud stack to VMs when required.
• Responsible for configuring networking concepts like NIS, NFS, SAMBA, LDAP, SSH, SFTP, SNMP, DNS, DHCP, troubleshooting network problems such as TCP/IP, supporting users in solving their problems.
• Helping users to recycle disk space and processes running on prod., when it reaches max. Threshold.
• Adding Application accounts and UNIX ids to LDAP server and reset LDAP passwords.
• Setting up pseudo access to application accounts, making application accounts password-less SSH.
• Helping users to unlocking application accounts and reset passwords.
• Involved in WAS cluster setup and application deployment.
• Created environment/file system for Oracle RAC running on Linux and UNIX platform. Used GFS on Linux and Vertias SFRAC on Solaris for oracle RAC.
• Using VMware for testing various applications on different operating systems.
• Installing RPM packages on Red Hat Linux Servers and updating wif the halp of YUM and Up2date.
• Installing, Configuring, Administrating and Troubleshooting of ESX 4.x/ESXi5.x, Virtual Center.
• Configuring, Managing and Scheduling CRONTABs for App Accounts and Backup management on a regular basis.
• Actively involved in raising Hardware tickets wif IBM/HP vendors and co-ordinating wif them for resolution of any hardware related problems.

Environment: OEL 5/6, Red Hat Linux 4.x/5.x Oracle 9i/10g, Samba, IBM blade servers, cronjobs, WebsphereWeb Logic 8.1, VMware ESX 4.x/5.x, Apache Server 1.x, 2.x, Bash, Espresso.

Confidential, Dallas, TX

Sr. Linux Administrator

Responsibilities:

• Installed, Configured and Upgraded OEL 5 and 6, Redhat LinuxRHEL4/5/6 operating systems.
• Installed and Configured Logical Volume Manager on Linux 6.
• Implemented RAID techniques and the created Disk groups and volumes.
• Used VMware for testing various applications on different operating systems.
• Installation, Configuration, Administration and Troubleshooting of ESX 4.x/ESXi5.x, Virtual Center.
• Created Templates, Clones for VM and Deploying VM from template and OVF template.
• Installed Redhat Linux using Kick start wif the halp of HTTP server.
• Installed and configured server automation tool puppet.
• Provided sudo access to users, granted privileges for app users to view or edit cron jobs, maintained user accounts by setting up accounts never expire, passwords never expire.
• Managed Disk and File system through Logical Volume Manager.
• Configured yum repository server for installing packages from a centralized server.
• Updated Servers wif latest Patches using Local repo wif the halp of yum.repos.d.
• Manually managed DNS, FTP, NIS, and HTTP, Account management, Samba, NFS, Auto mount, VNC, Disk management, NTP, package update, OS installation and taking its image.
• Configured and managed SELinux (Linux Firewalls) and allowed appropriate ports wif halp of IPTABLES.
• Involved in Relocation and migration of Linux server and SAN storage between data centers and testing.
• Worked on SAN storage Technologies using ISCSI Target and Network Storage Systems like NAS, SAN.
• Created Physical Volumes, Volume groups and Logical Volumes, implemented disk mirroring on LVM.
• Involved in day to day maintenance and troubleshooting problems related to Linux.
• Involved in installation and configuration servers. Configuration of Boot Server for Kick starts process& performed Kick start and puppet to install OS on Several workstations.
• Installation and configuration of RHCS (Redhat Cluster Suites) for high availability.
• Created slices or volumes, constructing file systems, monitoring free space, disk usage, Administration& monitoring of disk based file system. Knowledge on Nagios monitoring tool.
• Configured DNS, DHCP servers & Installation of Web logic, troubleshooting etc.

Environment: Red Hat Linux 4.x,5.x AS ES, Oracle 9i/10g, Samba, NT/2000 Server, Web sphere, Web Logic 8.1, VMware ESX 2.x, Apache Server 1.x,2.x,, Bash.

Confidential, TROY, MI

Linux Administrator

Responsibilities:

• Installed, upgraded and configured RedhatEnterpriseLinux4.2, 5.2, 5.3, 5.6.
• Configuration and administration of DNS, LDAP, NFS, NIS and NIS+ on RedHat Linux
• Hands on experience working wif production servers at multiple data centers.
• Automated server building using Kick start in RHEL 6 and Jump start in Sun Solaris 10.
• Installed and configured Puppet and made all repeated tasks automated.
• Planning, documenting and supporting high availability, data replication, business persistence, fail-over, fail-back using Redhat Cluster Server in Linux environment.
• Troubleshooting production servers and configuring standalone production server for testing.
• Configured system imaging tools ghost and System Imager for data center migration.
• Configured yum repository server for installing packages from a centralized server.
• Created local repository to connect Linux server to RHEL site for downloading packages and patches.
• Created local repository in yum.repos.d to run packages using yum, rpm and up2date.
• Configured and managed SELinux (Linux Firewalls) and allowed appropriate ports wif halp of IPTABLES.
• Installed and configured DCHP server in Linux to give IP leases to production servers.
• Management of RedHat Linux user accounts, groups, directories and file permissions.
• Configured, managed ESX VM’s wif virtual center and VI client.
• Performed Kernel tuning wif the systole and installed packages wif yum and rpm.
• Installed and configured LAMP Linux Apache, MySQL and PHP.
• Performed Disk management wif the halp of LVM (Logical Volume Manager).
• Configuration and Administration of Apache Web Server and SSL.
• Backup management using CRONTAB, running the backup based on client requirements.
• Involved in IBM Web sphere MQ coding like MQ managers, channels, and listeners.
• Password-less setup and agent-forwarding done for SSH login using ssh-key gen tool.
• Used NAGIOS monitor tool to monitor CPU, memory and disk space loads.
• Established and maintained network users, user environment, directories, and security.
• Documented testing procedures and steps involved in data migration on production servers.
• Provided 24/7 on call support on Linux Production Servers. Responsible for maintaining security on RedHat Linux.

Environment: RHEL 6.x/5.x/4.x, Solaris 8/9/10, IBM blade servers, Websphere 5.x/6.x, Apache 1.2/1.3/2.x, Oracle 11g/10g/9i, Logical Volume Manager, crontab backup, SAN, VM ESX 3.x/2.x.

Confidential

Linux Systems Administrator

Responsibilities:

• Installation, Configuration, Administration & Trouble Shooting of RHEL 5.
• System builds from the scratch for UNIX and Linux system.
• User administration through power broker and power password tools.
• Installation and configuration of Apache HTTP web servers.
• Installing Applications, software, packages, and patches on Linux Servers using RPMS.
• Package, Patches management, migration, integration & distribution in development, testing.
• Managing day-to-day user administration like adding or deleting users, password aging users/groups, NFS using the TCP/IP applications such as Telnet, FTP, and R-logins.
• Created Local repository in yum.repos.d and connected Linux machine to RHEL website for updates.
• Worked wif RedHat Linux tools like RPM and yum to install packages and patches for RedHat Linux.
• Installed and configured Virtual machines, vsphere VM ESX 3.x/2.x.
• Installation and Configuration of Linux clusters for High availability, failover and redundancy purpose.
• Installed and configured Logical Volume Manager and resized File system online
• Created User, Groups. File Systems per database requirement.
• Disk and File system management through Volume Manager.
• Used NAGIOS tool to monitor log files, temperature and hardware errors.
• Managed physical and Logical volumes, Volume Groups etc. in Linux.
• Installation, Configuration of Web logic, Web sphere and Apache Servers in Linux 4, 5 and 6.
• Implemented SUDO, SSH and other security tools. Configured IPv4, IPv6 and IPSEC.
• NFS Management - Take care of user accounts/groups, setting up of NFS environment.
• Maintained site services, includes NIS master, slave servers, DNS, Samba, FTP and Netbackup server.
• Involved in trouble shooting day-to-day system and user problems wif halp of Dtrace.
• Involved in planning and implemented Disaster Recovery sites from the scratch.

Environment: Solaris 8,9,10, Redhat Linux AS3.0, LAS 4.0, VCS, 3.0, Sun 12K, Solaris Volume ManagerWeb logic 8.1, Samba, Oracle 9i/10g. Sun Ultra Enterprise Servers (E450, E420R, E250),