Sr. Linux Administrator

Technical Summary:

• Over 7 years of extensive experience in Installation, Configuration, Upgrading, Support, and Maintenance of various Linux flavors like RHEL, SUSE , CentOS, Ubuntu, Unix flavors like Sun Solaris, IBM AIX and Windows Servers.
• Handled routine maintenance with latest Security updates and software update.
• Experienced in configuration of DNS, NIS, NFS, LDAP, FTP remote access on Linux and Solaris.
• Extensively worked on VERITAS File System 3.x/4.x/5.0 , VERITAS Cluster 3.x/4.x , VERITAS Volume manager and Logical Volume manager for disk management and mirroring.
• Extensively worked on Automatic Scripting using shell scripts bash, awk, sed .
• Expertise in Building and supporting environments consisting Testing, Contingency, Production and Disaster Recovery Servers.
• Hardware configuration, installation and management on Sun, HP servers and Workstations.
• Handling and generating tickets via the Remedy footprints ticketing tools.
• Installation, Configuration and Maintenance of Samba, Apache Tomcat, Web Sphere and Jboss servers in Sun Solaris and Linux environment.
• Experienced with installation, configuration of RAID volume management using Veritas Volume Manager and Solstice disk suit on Solaris Disk across Quotas.
• Experience on backup and recovery software like Veritas Net backup 5.0 and 6.0 on Linux environment.
• Configuration and administration of Fiber card Adapter's and handling of SAN SAN arrays HITACHI, EMC .
• Configured Security authenticators, managed security realms.
• Knowledge of Routers, Switches, Hubs, Firewalls, LAN, WAN Intranet, Internet.
• Experience in architecting, setting up data centers and migration of applications.
• Strong analytical, diagnostics, troubleshooting skills to consistently deliver productive technological solutions.
• Providing 24/7 technical support to Production and development environments
• Excellent client relation skills and the drive to complete tasks effectively and efficiently where customer services and technical skills are demanded as well as the ability to communicate effectively with all levels of management and the client community.

TECHNICAL SKILLS

PROFESSIONAL EXPERIENCE:

Confidential

Role: Sr. Unix administrator

Responsibilities:

• Performed installation, configuration and maintenance of Redhat Linux 4.x/ 5.x/6.x/7.x Installation, configuration and Operating System upgrade on Sun Solaris 10,11,12 on sun Servers.
• Also excelled on Linux kernel, memory upgrades, and swap area. Red hat Linux Kick starts Installation. Configuring DNS, DHCP, NIS, NFS in Red hat Linux other Network Services.
• Performed daily backups, restoration of data as per requests from developers using Veritas Netbackup. Veritas File system and Veritas Volume Manager 2.5 are used to configure the RAID 1 and RAID 5 Storage Systems Experience in Servers consolidation and virtualization using VMware virtual infrastructure, VMware ESX. Implemented RSA two factor authentications in the environment, which gives more security for the users logging in. Worked closely with DBA's in various aspects. Worked on upgrading CA workload automation for the batch servers.
• Wrote Shell Scripts as cron jobs and deployment scripts for various reasons.
• Provided application support for Weblogic application servers as required.
• Network trouble shooting using 'ndd', 'traceroute', 'netstat', 'ifconfig' etc
• Installed of all the required Software, patches, documentation, licensing trouble shooting.
• Monitored overall system performance, performed user management, system updates and disk storage management.
• Troubleshooting host-based connectivity issues related to EMC software like PowerPath, Navisphere and Unisphere.
• Configured LDAP and worked on integrating it with Active Directory.
• Created users, manage user permissions, maintain User File System quota on Redhat Linux and Solaris. Setup of full networking services and protocols on UNIX including NIS/NFS, DNS, SSH, DHCP, NIDS, TCP/IP, ARP, applications, kickstart and print servers to insure optimal networking, application, and printing functionality. Installed and configured Sudo for users to access the root privileges.
• Used Zone Configuration in solaris10 boxes. Used zoneadm utility to create and maintain the zones. Created many number of zones under the Global zone and setup network for the zones.
• Performed zone migrations from one machine to other on T5240's.
• Worked on Decommissioning of the servers.

Environment: Redhat 4,5,6, HP Gen 8 Blades and Rack mount Servers, HP Server Automation, Vmware Vsphere 4.1 and 5.1, Microsoft System Center, IBM Storage, and NetBackup Storage.

Confidential

Role: Linux administrator

Responsibilities:

• Installation, Configuration and upgrade of Redhat Linux 4,5,6 , CentOS, Solaris, HP-UX Windows 2000 / 2003/2008 Operating System.
• User Administration, management and archiving.
• Configuring NFS, NIS, NIS , DNS, Auto Mount Disk Space Management on SUN Servers.
• Experience in Configuring and Managing Virtual Disks, Disk Mirrors RAID Levels.
• Worked with OVF Open Virtual Machine Format supported tools Virtual Box, Red hat Virtualization XEN , and VMware Workstation.
• Experience with VMware Virtualization using ESX hypervisor of Vsphere 4.0.
• Installation, Configuration and Maintenance of Samba, Apache Tomcat, Web Sphere and Jboss servers in AIX, Sun Solaris and Linux environment.
• Experience in Active directory configurations and support.
• Troubleshooting host-based connectivity issues related to EMC software like PowerPath and Navisphere and worked on upgrading their version.
• Expertise in creating and managing Logical Volume Manager in AIX, HP-UX and Red hat Linux.
• SENDMAIL configurations and administrations, testing the mail servers.
• Creating new file system, managing checking data consistency of the file system.
• Setup and configure VERITAS NetBackup 5.x, 6.x and 6.5x Net Backup server / client tape libraries.
• Monitor Modify and Optimize NetBackup activity, backup schedules and reporting to proactively avoid issues.
• Performed automated installations of Operating systems using Jumpstart, Flash Archive for Solaris and Ignite for HP-UX.
• Installation of Packages and Patches for Solaris 8/9/10, Red hat Linux 4/5/6.
• Disk and file system management through Veritas Volume Manager / Veritas File System and Solstice Disk Suite.

Environment: Redhat 3,4,5 , CentOS and Solaris 8 / 9 / 10, Sun Enterprise Server, HP 9000 K, L, N Class Server, IBM RS/6000, pSeries Server, NetBackup 5.0, Veritas Volume Manager 4.x/5.0, SAN EMC Clariion CX 700/ CX 600/ CX 500, EMC DMC 2000/ 3000, NetApp NAS 3000, Windows NT 2003/2000/ XP.

Confidential Role: Unix/Linux Administrator

Responsibilities:

• Installation, Configuration Upgrade of Solaris, AIX, HP-UX, Linux and Windows-NT operating systems.
• Installation Packages and patches.
• Supported 24/7 high availability production servers.
• Monitoring System using HP/ITO, Do kernel tuning to enhance the system Performance.
• Configuration and Administration of DNS, NIS, NIS , NFS, send mail.
• Installation, configuration and remediation of various Security software
• Expertise in VMware Virtualization using Vsphere 4.0.
• Installation and configuration of Netscape and Apache web server and Samba Server.
• Jumpstart installation. Writing Shell and Perl Scripting for automation of job.
• Configuration of Hardware and Software RAID. Disk replacement and File system recovery.
• Interaction with vendors for Hardware and software supports.
• Configuration and Administration of Veritas Cluster and MC Service Guard.
• Day to day maintenance of Veritas cluster Servers and MC Service Guard.
• Disk and File system management through Veritas Volume Manager, LVM and SVM.
• Installation and configuration of Apache and Websphere Server in Linux Platform.
• Backup management through Veritas Netbackup. Creation of Volumes and pools and scheduling the job.
• Installation and configuration of Network Printer with Centralized control of print client.
• Database Backup and Recovery. Performance Monitoring and Tuning
• Planning and setup of Disaster Recovery Servers.
• Trouble shooting of day to day system and user problems.
• Designing computer displays to accomplish goals using flowcharts and diagrams.
• Installing Operating Systems and Application Software.
• Training for users to use the program.

Environment: Solaris 8/9/10, HP-UX, 10.x/11.x, AIX 4.x/5.x, Windows NT 2003/2000/ XP, NT, Redhat 5, SUSE, Sun Enterprise 450/420R/250 Servers, Ultra Enterprise 2/1 Servers, SPARC server 1000, SPARC server 20 Enterprise Servers, SPARC server 1000/20, SPARCstation 10, Sun Sparc Ultra 1,5,10.

Confidential Role: UNIX/Linux Systems Administrator

Responsibilities:

• Responsible for day-to-day System Administration for SUN SOLARIS servers.
• Build the E450 and 6000 Servers with Solaris operating system.
• Storage setups, RAID, Logical Volume Manager, system backup design and disaster recovery
• Systems performance monitoring.
• Experience with VMware Virtualization.
• Solaris Operating Systems upgrade, package installations, updates, patches and software fixes.
• Configured the Send mail client side for Sun Solaris servers.
• Responsible for troubleshooting end user and application problems.
• Veritas File system and Veritas Volume Manager 2.5 are used to configure the RAID 1 and RAID 5 Storage Systems.
• Creating User accounts, Mail account, groups, printer etc
• Installing operating systems, patches, hardware, vendor software packages, system customization and documentation of all departmental UNIX, PC-based workstations and Terminal.
• Monitoring system resources, logs, disk usage, scheduling backups and restore.
• Set up Quotas for the user accounts limiting the disk space usage.
• Creation/Configuration of Additional swap/ tmp dynamically as and when required.
• NFS Management - Take care of user accounts/groups, setting up of NFS Environment.
• Solving the problems as when created when NFS data being accessed.
• Configured auto mounts/maps for the user accounts. Administration/Configuration of Print Servers/Clients in the Network
• Worked closely with database administration staff to ensure optimal performance of databases, and maintain development applications and databases.
• Assembling the systems and installing operating system and application software.

Environment: Solaris 10/9/8/2.x, HP-UX 11.0/11i, AIX 4.3, 5.1/5.3L,Sun E10K and E15K Servers, Sun Enterprise 6500/500/4500/450/ 420R/250 Servers, Ultra Enterprise 2/1 Servers, SPARC server 1000, SPARC server 20 Enterprise Servers, SPARC server 1000/20

Confidential Role: Unix/Linux Administrator

Responsibilities:

• Installation, Configuration, Upgradation and administration of Sun Solaris, RedHat Linux and HP-UX.
• User account management, managing passwords setting up quotas and support.
• Worked on Linux Kick-start OS integration, DDNS, DHCP, SMTP, Samba, NFS, FTP, SFTP, SSH, LDAP integration.
• Controlled the access to users by adding or removing the user from the groups as per the requirements by using LDAP.
• Troubleshooted LDAP server if there are any login issues for the users.
• Used LDAP to set Permissions, as an administrator to allow only certain people to access the LDAP database
• Network traffic control, IPSec, Quos, VLAN, Proxy, Radius integration on Cisco Hardware via Red Hat Linux Software.
• Managing file systems and disk management using Solstice Disksuite.
• Responsible for configuring real time backup of web servers.
• Log file was managed for troubleshooting and probable errors.
• Responsible for reviewing all open tickets, resolve and close any existing tickets.

Environment: Dell Hardware, RHEL 3.x, SUSE Linux, Sun Solaris 2.6 and 2.7, Sun E450, E250, Sparc stations 20, Switches, Hubs, DAt DLT Tape Drivers, Apache, IIS 4.0 and Oracle 8i.