SUMMARY:

• Overall 7+ years of experience as Linux/Unix system administrator on Redhat EL 4.x, 5.x, 6.x, Debian, CentOS 4.x, 5.x, Suse, Oracle Enterprise Linux, FreeBSD, Solaris 8,9,10 and VMware vSphere ESX/ESXi environment. Motivated, enthusiastic, and pro - active System Administrator with an excellent 'can-do' attitude.
• Experience in Red Hat Enterprise Linux, oracle linux, Ubuntu Linux, Fedora Linux.
• Experience and Familiar with Virtualization technologies like installing, configuring, administering VMware ESX/ESXi and Citrix Xen Server/openstack. Created and managed VMs (virtual server) and also involved in the maintenance of the virtual server.
• Experience with VMware VsphereESXi 4.1/5.0/5.1/5.5
• Understanding of networking concepts, (IE. Configuration of networks, router configuration and wireless security, TCP/IP, VPN, Content Filtering, VLANs, and routing in LAN/WAN, Ethernet Port, Patch Panel and wireless networks.)
• Understanding of networking fundamentals and network security. Installation, Configuration and managing Firewalls like Fortinet, ZyWall, SonicWall, ISA with content filtering, Anti-Spam, Web filtering, NAT, Application Publishing to public IP, Port Forwarding, log analyzing with Syslog Server.
• Experience using various search, text, and file systems. Have used ‘grep’, ‘Sed’ etc.
• Experience in implementation Intrusion Detection System: Tripwire, Snort, Lids.
• Experienced in installation, configuration, design and ongoing maintenance of Cisco router and switches.
• Experience in Installing, configuring and maintaining Samba, Web Sphere& Web Logic Application Servers, Nagois and Chef.
• Experience with x86 / x64 Intel, HP, IBM & Dell hardware like rack-mounted servers, tower servers, desktop, laptop and other peripherals.
• Experience in iSCSI SAN, NAS, NFS storage and RAID concept.
• Supported AWS Cloud environment with 200+ AWS instances and configured Elastic IP & Elastic Storage and also experience working on implemented security groups.
• Experience in Server monitoring, capacity planning, application monitoring with the help of Tivoli, HP insight, Nagios, Cacti, Zabbix
• Experienced in Amazon EC2 setting up instances, virtual private cloud (VPCs), and security groups.
• Handling day-to-day User Administration tasks like adding, deleting and modifying user data and documenting all user data in a centralized location.
• Experience working in customizing the Kickstart and Jumpstart scripts to automate the installation of various servers used for various internal projects.
• Responsible for Backup and Recovery operations of various servers using VERITAS Net Backup.
• Working Knowledge on using and developing Shell, Perl and python scripts used to automate day-to-day administrative tasks.
• Responsible for OS maintenance activities like upgrading the OS, updating the services and third-party software’s.
• Worked in maintaining integrity of Linux, Solaris servers by performing patching operations on a regular and planned way.
• Installation and configuration of Web Application servers like Apache, Tomcat and Weblogic.
• 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.
• Experienced in documenting various maintenance activities and upgrades and changes in the network architecture.

TECHNICAL SKILLS:

Operating Systems: Linux (RedHat, CENTOS & SUSE), Solaris 10/9/8, HP-UX 11.0, 11.11, IBM AIX (4.3/5.x), HPUX11i V1, V2 & V3, VMWare ESX, SLES 8,9,10 & 11, Windows NT /2000/2003, MAC OS X 8/9.x/10.x.

Hardware: M5000, M8000, T5220, T5240 Sun E15K, E25K, Sun Fire 6800/4900/3800, Sun Fire 490/280, v880/v890, Sun Enterprise Servers E6500, E4500, E3500, Work Group Servers E450, E420, E250, E220, Netra 1405, Netra X1, Ultra 80, 60, 30, 10, 5, 2, 1, Intel Servers

Networking: TCP/IP, NIS, NFS, FTP, DNS, DHCP, Samba, Apache, SMTP, SSH, IP-Tables

WEB Technologies: Tomcat, APACHE 2.x, 3.x, Jboss, Web Logic (8/9/10) & Web Sphere 4.0/5.0

Programming, Scripting Language & Databases: RDBMS, MySQL, Oracle, Sybase, MSSQL, C, UNIX Bash & Shell Scripting, Perl Scripting, Python, Ruby, HTML, VB

Backup Management: Veritas Netbackup 4.x/5.x/6.x, Ufsdump, Ufsrestore, TAR,cpio, dd, Tivoli, Symantec Netbackup 7.x

Third Party Software: VERITAS Volume Manager, VERITAS Cluster Service (VCS), HP Service Guard, Sun Cluster, EMC Storage, RAID Technologies, SSL, Splunk

Protocols: TCP/IP, UDP RIP, OSPF, EIGRP, IGRP, SNMP, SMTP, TELNET

PROFESSIONAL EXPERIENCE:

Confidential, San Francisco, CA

Linux/Unix Administrator

Responsibilities:

• Installation, configuration and Operating System upgrade on, Red Hat Linux 3.x, 4.x, 5.x, 6.x and Sun Solaris 8,9,10.
• Administrated server consolidation program through use of VMware ESX server and VMware Virtual Center.
• SWAP box configuration, Implementation of disaster backup and recovery.
• Performance Management & Tuning of RHEL.
• Veritas File system and Veritas Volume Manager 2.5 are used to configure the RAID 1 and RAID 5 Storage Systems
• Installed and configured SAMBA server for windows and Linux connectivity.
• Installed and Configured Sun availability Suite 3.5 to implement Point-in-time snap shots and remote mirroring.
• Implemented and configured Backup policies and Storage Units.
• Managing disk storage with Veritas Volume Manager 3.5/4.1 and Solaris Volume Manager with Veritas File System (VxFS).
• Installed Web Logic 8.1 with SP5 Server and configured Domains, Admin and managed servers for Applications to be deployed.
• Securing Apache, PHP, and Tomcat as per PCI scope
• Implemented NIS and NFS for administrative and project requirements.
• Installed and Configured Web and investigate the configuration changes in the production environment.
• Responsible for multicasting and NLB F5-BIGof various components as a system administrator.
• Worked closely with database administration staff to ensure optimal performance of databases, and maintain development applications and databases
• Tuning the kernel parameters based on the application/database requirement.
• Monitoring system resources, logs, disk usage, scheduling backups and restore
• Set up Quotas for the user accounts & limiting the disk space usage.
• Configuring SUDO and granting root permission to users for performing certain activities.
• Upgrading RHEL 5.x to RHEL 6.x using live upgrade and manual upgrade.
• File system tuning, growing, and shrinking with Veritas File system 3.5/4.x
• Worked on network connectivity, SAN storage, creating LVM and taking TSM backup.
• Installation, configuration Active Directory, Group Policy, Migrations, Security GPOs, DNS, DHCP, File & Print Server, IIS (Web Server), FTP, Terminal Server, Microsoft Clustering and Exchange Mail Server in Windows based server environment.
• Created BASH shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation.
• Installed Deployment & system configuration Automation JIRA, HPSA and Puppet server.
• Modifying user’s password policies, group policy, UID and GID assignment policies.
• Monitored the performance of the system using top, sar, ps, prstat, vmstat, netstat, iostat, and cpuinfo to check the CPU utilization, bottlenecks of I/O devices,, memory usage and network traffic.
• Troubleshoot network connectivity used ping, netstat, ifconfig, and trace route commands. Login to the remote system using sudo, putty, and telnet. Transfer files across the systems on the network used ftp, scp, and rsync commands.
• Linux technical support and prepared technical documentation for check in verification.
• 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.
• Working knowledge on ITSM remedy and Maximo ticketing systems.
• Provided 24x7 System Administration support for Red Hat Linux and CentOS servers and resolved trouble tickets on shift rotation basis.
• Provide support for building servers, patching, user administration tasks, deployment, software installation, performance tuning and troubleshooting and KVM.

Environment: Red Hat Linux 3,4,5,x 6 VMware ESX 3.5, vCenter 5.1, ESXi 5.1, Windows Server 2008 R2,sun Solaris 8,9,10, Solaris Volume Manager, Veritas Cluster Server, Weblogic 8.1, Samba, Oracle 9i/10g, HP DL 385 G6, HP DL380 G7

Confidential, Boise Idaho

Linux/ Unix Administrator

Responsibilities:

• Installed and configured RHEL 4.3, 4.7, 5.1, 5.2, 5.3 and SunOS on Dell and IBM Bladecenter servers.
• Administered, maintained Red Hat 3.0, 4.0, 5.0, 6.0 AS, ES, Troubleshooting Hardware, Operating System Application & Network problems and performance issues
• Deployed latest patches for Sun, Linux and Application servers,
• Performed Solaris and Red Hat Linux Kernel Tuning for TCP stack.
• Installing and upgrading Redhat Linux, firmware, failed hardware and system support software Dell PowerEdge Servers.
• Implemented log parser to provide support for multiple server log file formats
• Performance monitoring with Prtdiag,Sar, Iostat, VMstat, MPstat and Other Tools.
• Disk Space management using VERITAS Volume Manager and Apache Cassandra
• Configuration of Hardware and Software RAID. Disk replacement and File system recovery. Implemented Virtualization using VMware in Linux on HP-DL585.
• Installed and configured KVM on Dell Blade Servers using virt-manager
• Troubleshooting critical hardware and software issues and other day-to-day user trouble tickets; maintaining email servers designated for 5 million residential and over 100K HSI customer’s Installing and setting up Oracle9i on Linux for the development team.
• Created Servers, User mappings and Nicknames to access DB2 and Oracle databases.
• Installed VMware ESX server on Dell Servers and configured Solaris 9/10/ Red Hat Linux 4.0, 5.0, 6.0 / Windows 2000 virtual machines for various applications.
• Installation of software packages and checking the integrity of the installed packages. Installed different RPM Linux 4.0/5.0.
• Administered Linux servers for several functions including managing Apache/Tomcat server, mail server, MySQL database, and firewalls in both development and production
• Implemented OpenLDAP in enterprise environment, created user mailboxes, modified various user attributes in LDAP/LDIF
• Installed and configured Sudo for users to access the root privileges.
• Integrating UNIXfile systems using packages like SAMBA. Setting up printers on UNIX / NT machines to work seamlessly across platforms.
• Configured and administered firewall rules to effectively monitor system files, port security, and network traffic activity coming through the firewall.
• Assisted other teams for projects like ISS Development, Test and QS environments
• Worked with different hardware and software vendors to troubleshoot the hardware and software problems including Oracle, Openwave, Terris, Dell and many more.
• Document backup policies and procedures for backup routines, schedules and restore policies.
• Responsible for backup of all servers, and recovery of servers.
• Managing cron jobs, batch processing and job scheduling.
• Able to create and maintain documentation for servers and storage environments.
• Supporting and in-depth troubleshooting of Linux/Solaris systems 24 x 7 Environment

Environment: SunOS, Linux, VMWARE, IBM 8677, IBM Blade center Servers (HS20, HS21), Lenovo workstation’s (D2, D3, D10, D20), IBM P520, P550, P560, P570, P575, P595, IBM IntelliZpro-9228, MAC pro workstation’s, DELL Poweredge 1650,2850,2950,6400, SUN SPARC workstations (A21, A22, A70, A89), NFS, NIS, DNS, PICS, Preload Assist Servers.

Confidential, Atlanta, GA

Linux Systems Administrator

Responsibilities:

• Installation, configuration and Operating System upgrade on, Red Hat Linux and Sun Solaris.
• Performed automated installations of Operating System using kick-start for Red Hat Enterprise Linux 5/6 and Jumpstart for Solaris 9/10 Linux.
• Administrated server consolidation program through use of VMware ESX server and VMware Virtual Center
• Gathered VM requirements from the Performance Team, placed reservations and deployed Virtual Servers in Test and Production Environments.
• Experience in VMWARE ESXi 4/5 and vSphere and managed VM resource upgrades, Cold migration of VM from once vCenter to other.
• Handled and documented Cold Migration issues and IP, SAN, Network bandwidth and VLAN constraints.
• Performance Management & Tuning of RHEL.
• Responsible for multicasting of various components as a system administrator.
• Monitoring system resources, logs, disk usage, scheduling backups and restore
• Set up Quotas for the user accounts & limiting the disk space usage.
• Configuring SUDO and granting root permission to users for performing certain activities.
• Upgrading RHEL 5.0 to RHEL 5.5 using live upgrade and manual upgrade.
• Installing, configuring and maintaining AIX, SUSE LINUX servers including the logical partitioning on p690 and p650 servers.
• Installed and Configured Web logic 8.x, 9.x on Java Applications.
• Experience managing various file systems using LVM and SVM and also configured file systems through network using NFS, NAS, SAN methodologies and installed RAID devices.
• Designed and configured large AIX systems (p6, p5), Building VIO Servers LPRAS, VIO Client LPARS installed VIOS 2.3, AIX6.1/5.3 using HMC V6 and installed/backup VIOS, BOS using NIM.
• Installed and maintained OpenStack on KVM for cloud based applications.
• Extensive use of LVM, creating Volume Groups, Logical volumes, and disk mirroring.
• Performance Management & Tuning of AIX 5.2/5.3 UNIX Kernel.
• Hands on experience on various cloud computing products such as Amazon Web Services EC2 and VPC.
• Removing Virtual Resource from the VIO Server and Decommissioning the VIO Client LPARS.
• Implemented TSM backup Solution across the environment to backup the rootvg for all AIX servers.

Environment: Red Hat Linux 5, VMware ESX, VERITAS NetBackup, Weblogic, Oracle 10g, Tivoli Storage Manager(TSM), BMC Tools, NAGIOS, HPSM, JIRA

Confidential

System Administrator

Responsibilities:

• Installed and configured of Solaris and Linux servers using JUMPSTART and KICKSTART installation and periodic Patch Upgrading using Live upgrade.
• Troubleshooting hardware and replacement of failed components running on LINUX and SOLARIS environment, Performance tuning activities like allocation and monitoring of disk space using Disk Quota system.
• Installed and administered DNS, NIS, NIS+, NFS, and Send mail for centralization and firewall setup with intables on Solaris and Red Hat.
• Provided highly available data services to users using Solaris volume manager (SVM) and Logical volume manager (LVM).
• Created and maintained user accounts and print queues, installed tools/compilers including GNU required by the environment and maintained their licenses.
• Resolved config issues and problems regarding NFS mounts, NIS maps, user ids, rpminstalls, and driver installs.
• Configuration of Hardware and Software RAID. Disk replacement and File system recovery.
• Used VERITAS Volume manager for Storage administration.

Environment: Fujitsu DRS6000 sparc server, SUN Solaris 2.7/8/9, RHEL 4/5, SUN Enterprise 3500, 6500, 220R, 250, 420R, Enterprise workstations Ultra 80, Ultra 60, Ultra 10, Ultra 2, VERITAS Volume Manager 3.0.