SUMMARY:

• Over 7+ years of experience as a Unix/Linux Professional. Worked extensively on different versions of UNIX including Sun Solaris 8/9/10, Red Hat Linux, CentOS, Debian and Ubuntu.
• Hands on experience in systems setup, configuration, upgrade, maintenance, migrations, performance monitoring and troubleshooting on different UNIX platforms like Sun Solaris, Linux, HP - UX system software and hardware as well as networking.
• Experience in Installing, upgrading and configuring RedHat Linux 3.x, 4.x, 5.x using Kickstart Servers and Interactive Installation.
• Extensive experience with operating systems, network protocols, systems programming and configurations, and/or hubs, switches, and routers.
• Thorough knowledge of UNIX internals and utilities. (Kernel, Memory, Swap)
• Extensive working experience in process scheduling, disk and file system I/O, kernel internals, TCP/IP networking, Microsoft IIS and Web Services, Network & Firewall.
• Expertise in RAID Configuration, Veritas Cluster Server, Veritas Volume manager, Logical Volume Manager and Veritas Net Backup.
• Experience in using various network protocols like HTTP, UDP, POP, FTP and SMTP.
• Proficient in Perl, Shell and Python scripting.
• Experience in RPM and YUM package management.
• Proficient in using admintool, vmstat, netstat, iostat, ifconfig, trace route.
• Experience in setting up LANs and WANs.
• Performing software installation, upgrades/patches/packages, troubleshooting, and maintenance on Linux/Unix Servers.
• Experienced in configuring various Servers including DNS, NIS, NFS, FTP, DHCP, LDAP, Samba, SENDMAIL and Apache in Linux.
• Well versed in configuring Volume Groups and Logical Volumes, extended logical volumes for the system growth needs using Logical Volume Manager (LVM).
• Adding new users / removing users / resetting user accounts. Adding new computers to the Domain. Analyzing, troubleshooting and resolving problems involving operating system issues.
• Performing software installation, upgrades/patches/packages, troubleshooting, and maintenance on Linux/Unix Servers.
• Scheduling various cron jobs for backups, database, proprietary jobs using CRON and BMC Control-M and troubleshooting daily job problems.
• Experience in creation and managing user accounts, security, rights, disk space and process monitoring in Red Hat Linux.
• Experience in supporting 250+ Amazon AWS Images running Red Hat, Ubuntu and Windows.Worked with Docker, Kubernetes, Openshift to build images and create communication between containers on AWS.
• A good team player with strong communication skills and an inquisitive mind to learn more.
• 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:

Operating System: Solaris 7, 8, 9, 10 &11, Redhat Linux 2.1, 3, 4.x5.x,6.x,7.x,Suse 9,10&11, CentOS, Windows 2000/03/08/12

Hardware: SUN, Intel systems, HP PA-RISC, Itaniums and IBM, NetApp 8040, 3020, 940, Quantum Scalar i500 LTO4 tape drives, ADIC Scalar 1000 AIT-3 drives.

Networking Protocols: SNMP, SMTP, TCP/IP, IPX/SPX, NetBEUI, OSPF, SSH, SSL, BGP, IGRP, EIGRP, LAN, WAN, PCNFS, ARP/RARP, LDAP, FTP/TFTP, RIP, DHCP, DNS, NIS, NIS+, Automounter.

Languages: C, C++, PHP,, Shell Scripting - ksh, Bash and csh, Perl, Ruby, Python

Tools: VERITAS Volume Manager, Veritas Cluster Server 4.1/5.0/5.1, VERITAS Net backup 5.1, Sun Cluster 2.x & 3.x, VMWare ESX

Web Servers: Apache HTTP Server 1.3x,2.2x, iPlanet 6.x

File Systems: UFS, VxFS, ZFS, ext, ext2, ext3,ReFS,Xen virtualization

PROFESSIONAL EXPERIENCE:

Confidential - Houston, TX

Senior Linux/Unix Administrator

Responsibilities:

• Installation, Configuration & Upgrade of Linux and Solaris operating systems.
• Working on VMware vsphere client tool to create Virtual Machines on a physical machine.
• Rebuild of the both Linux (Redhat/SUSE/Ubuntu) OS when the server is crashed, using the established profile settings.
• Remote monitoring and management of server hardware and also servers in Amazon AWS.
• Scheduling the jobs by creating crontabs /Crontabs on Linux and Windows Servers.
• Provide 24x7 support for multi-customer environment including server &storage consolidation
• Supported a large infrastructure of Sun Enterprise-class servers running Solaris, providing corporate IS infrastructure (email, file service, etc.) using LDAP, NIS, NFS, etc
• Installation, configuration and maintenance of DNS, DHCP, TCP/IP, FTP, SFTP, VPN and NIS on Sun Solaris.
• Installed & configured two new mail servers. Sendmail was configured as SMTP mail server.
• Configuring and maintaining RAID devices using Veritas (VxVM) products and creating the disk groups, adding the disks to disk group, creation the volumes, Growing volumes according to user requirements.
• Upgraded Linux Kernel using YUM.
• Backup and restore using basic UNIX commands like tar, cpio, dd, etc.
• Monitoring system performance and capacity working on reconfiguration
• User, Group Administration and Advanced File Permissions.
• RedHat Administration: Install RHEL5.x & 6.x systems using manual & automated Kickstart process. Administration of RHEL servers, setting up YUM repository, etc.
• Regular disk management like adding and replacing hard drives in existing servers and workstations. Creating partitions according to requirements, creating new file system or growing existing one over the hard drives and managing the file system.
• Performed system administration for a mixed Linux/Sun environment serving 1000+ users: Apache Web servers, FTP, mail administration, UNIX systems and network perfomance monitoring and OS fine tuning, user accounts administration.
• Created physical and logical volume groups using Logical Volume Manager.
• Performance monitoring and tuning of the applications and OS using iostat,sar, vmstat, prstat commands.
• Backup & Recovery system performance monitoring kernel tuning, debugging OS failure.
• User, Group management for all the UNIX servers.
• Managed user accounts and authentication process by NIS service.
• Assigned the Server Build Tasks, DHCP management, Kickstart Modifications and OS image management to each team member.
• Performed hardware maintenance, upgrades and troubleshooting on workstations and servers.
• Involved in development, user acceptance, and performance testing, production & disaster recovery server.

Environment: RHEL 6.x/5.x, Cent OS 5.7, Solaris 9/10/11, Apache 1.2/1.3/2.x, Logical& Veritas Volume Manager, Veritas netbackup 5.x/6.0,VM ESX 4.x/3.x.

Confidential - Nashville, TN

Linux/Unix Administrator

Responsibilities:

• Involved in configuration and support of a production environment hosted in a 24x7 setup.
• Configuration and Creation of UNIX File System on Solaris.
• NFS & NIS implementation.
• Experience with Windows Firewall and Iptables, DNS, Linux LVM and Disk Partitions.
• Performed tuning of the kernel parameters for the better performance of the operating system and tuning TCP parameters and analyzed performance of resources like CPU, Memory, Disk and swap using native commands like prstat, vmstat, sar, iostat, swap etc.
• Setting up labs from scratch, testing hardware, installing and configuring various hardware devices likeprinters, scanners, modems, network and communication devices.
• Maintaining appropriate file and system security, monitoring and controlling system access, changing permission, ownership of files and directories, maintaining passwords, assigning special privileges to selected users and controlling file access, monitoring status of process in order to increase the system efficiency, scheduling system related and cron jobs.
• Creation and Managing Users/Group accounts and set up a user’s work environment.
• Troubleshoot hardware and software issues.
• Providing day-to-day user administration like adding/deleting users and managing users queries. Shell programming for routine administration tasks. Analyzing & monitoring system performance through various system
• Planning and implementing system upgrades including hardware, operating system and periodical patch upgrades.
• Creating System Disk Partition, mirroring root disk drive, configuring device groups in UNIX and Linux environment.
• Setup LANs and WLANs; Troubleshoot network problems. Configure routers and access points.
• Extensively worked on hard disk mirroring and stripe with parity using RAID controllers
• Configured Samba Server on sun machine, established network connectivity with PC’s through SMB & NMB Protocol.
• Extensively worked and involved in capacity planning discussions.
• Scheduling the daily/weekly/monthly backups.
• Administering and fulfilling the user needs.
• Network interface management.
• Installation, configuration and administration of VMware, Oracle Solaris Zones, Containers and Ldoms.
• User administrationwhich included creating backup account for new users and deleting account for the retired or deleted users.
• Modifying/ Writing scripts in Bash and Korn shell for optimizing day to day administration
• Increasing and Decreasing the volume size and file system size (UFS and VXFS).
• Maintain uptime (achieved 95-99% for customer servers.)
• Working 24/7 on call for application and system support.
• Troubleshooting and solving problemsrelated to users, applications, hardware etc.

Environment: Solaris 10, Redhat EL 3.x, 4.x,5.x and 6.x, NFS, GPFS, NIS, LVM, BSD Linux, Shell Programming, VLAN, FTP, Fortinet Firewall Apache Web Server 1.3.x, 2.2.x, Sun Java System Web server 6.0, Veritas Volume Manager 4.1, 5, BigIP F5, Oracle 9i, DNS, NFS, Sun T2000, M5000, v480, v880.

Confidential - Atlanta,GA

Unix/ Linux Administrator

Responsibilities:

• Installing, configuring and updatingSolaris 7, 8, Red Hat 7.x, 8, 9,Windows NT/2000Systems using media and Jumpstart and Kickstart.
• Performed project coordination function for evaluation, installation, monitoring, and maintenance of server software on variety of hardware platforms.
• Maintained maximum uptime and maximum performance capacity for Enterprise Production, QA, Staging.
• Remote system administration using tools like SSH, Telnet, and Rlogin.
• Proactive maintenance on systems by timely upgrading Patches to the systems and applications, Scheduling of batch jobs and cron jobs.
• Installed and configured Apache Web Server with SSL module. For load balancing & data redundancy two web servers were used on two different machines and round-robin entries were created for them in DNS.
• Configured SAMBA between the Linux and windows servers to provide directory sharing capability among Linux and Windows servers.
• Configuration of NIS, NIS+, DNS, NFS, Sendmail, Samba, Apache for multiple environments.
• Network Information Server (NIS) implementation. This included NIS software installation and configuration. Installed master and slave NIS servers.
• Installed/ upgraded patches and security (Kernel) patches for all applications in installed infrastructure.
• Creating UNIX and PERL scripts forautomated data backup, status of the storage.
• Regular disk management like adding / replacing hot swappable drives on existing servers/workstations, partitioning according to requirements, creating new file systems or growing existing one over the hard drives and managing file systems.
• Involved in development, user acceptance, performance testing, production & disaster recovery server.
• User administrationwhich included creating backup account for new users and deleting account for the retired or deleted users.
• Installation, configuration and maintenance of TCP/IP, FTP, SFTP and VPN on Sun Solaris.
• Implementation of naming services like DNS, DHCP, IIS with Bind 8.4.x and NIS.
• Planned & documented Disaster recovery steps. This included deporting the disk groups from the production server and importing on the backup server.
• Administered system logs and security logs.
• Updated software packages and applied security patches.

Environment: Red Hat Enterprise Linux, Sun Solaris 9/8, Windows 2000/Windows NT, Sun Servers 240R/V240/V 480/880/1280/2900/6800, Veritas Storage Solutions 4.0 for Solaris Veritas Cluster Server (VCS), Veritas File System (VxFS, Veritas Volume Manager VxVM), Veritas Netbackup 3.5, Apache Web Server.

Confidential

Unix/Linux Administrator

Responsibilities:

• Providing L1 and L2 Remote administration support (24*7).
• System Administration of Sun Solaris (8/9/10).
• RedHat Administration: Install RHEL5.x & 6.x systems using manual & automated Kickstart process. Administration of RHEL servers, setting up YUM repository, etc.
• Configuration and Creation of UNIX File System on Solaris.
• Fixing the free space issues for all production and development servers file systems alerts.
• Setup of full networking services and protocols on Solaris, including NIS/NFS, DNS, SSH, SFTP, DHCP, TCP/IP, applications, and print servers to insure optimal networking, application, and printing functionality.
• Administered Linux servers for several functions including managing Apache server, mail.
• Installed and configured Sudo for users to access the root privileges.
• Creating UNIX and PERL scripts forautomated data backup, status of the storage.
• Troubleshooting and solving problemsrelated to users, applications, hardware etc.
• User administrationwhich included creating backup account for new users and deleting account for the retired or deleted users.
• Respond to emergency calls relating to server performance, diagnosis of problems, repairing problems or calling upon appropriate vendors to resolve the issue.
• Troubleshooting NFS servers, NFS Clients with Auto Mount Environment.
• Monitoring System Performance of Virtual memory, System events, Swapping, Disk utilization, CPU utilization.
• Scheduling of automatic, repetitive Jobs using commands with Crontab.
• Installation of software packages and checking the integrity of the installed packages. Installed different RPM Linux 4.0/5/0.
• Integrating UNIX file systems using packages like SAMBA. Setting up printers on UNIX / NT machines to work seamlessly across platforms.
• Worked with different hardware and software vendors to troubleshoot the hardware and software problems.
• Performed all LVM and file system tasks like creation of Logical volume and file system, Mount a file system, Modifying size of a Logical Volume and file system, Removing a file system.
• Monitoring system performance and capacity working on reconfiguration
• Installed/ upgraded patches and security (Kernel) patches for all applications in installed infrastructure.
• Managing cron jobs, at Jobs, batch processing and job scheduling.

Environment: Solaris 8/9/10, Linux, VMWARE, SUN SPARC workstations (A21, A22, A70, A89),NFS, NIS, DNS; 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, DELL Poweredge 1650,2850,2950,6400.

Confidential

Unix/Linux Administrator

Responsibilities:

• Provide 24x7 supports for multi-customer environment including server &storage consolidation.
• Have primary responsibility for managing the day-to-day operations of the UNIX team. This includes identifying needs, prioritizing operational requirements, and allocating resources as appropriate.
• Shell scripting to automate environment, Disaster Recovery, etc.
• Planned & documented Disaster recovery steps. This included deporting the disk groups from the production server and importing on the backup server.
• Perform operational tasks and activities e.g. monitoring log files, performance tuning and migration between environments.
• Monitor the performance and availability of key middleware components in production and test environments.
• Responsible for providing technical support and providing production support for internally developed application.
• On-Call Pager support for integration and remediation of servers and attached peripherals and escalate issues to appropriate groups.
• Analyze User Requirements; propose alternative solution in setting up local area network and ensuring the server is up and running.
• Performed Memory and Swap management to improve optimization and performance of the servers.
• Creating and ManagingUserandGroup Administrationand Access Privilege Setting withSUDOERS onSolaris,Red Hat Enterprise Linux.
• VirtualizationInstalled and Configured Network Printers, Print Servers & File Servers.
• Troubleshooting the Network and Boot problems.
• Managed a team of System Administrators who escalated the Weekly & Daily Backup Reports, recovery logs, User activity reports & monitoring Reports of Firewall Logs.
• Analyze User Requirements; propose alternative solution in setting up local area network and ensuring the server is up and running.
• Configured iptables on Linux servers.
• Worked on Firewall implementation & Load balancer between various Linux and Solaris servers.
• Server monitoring and maintenance of the client’s production server (Linux).
• Installation and Configuration of Applications running on Linux and Solaris servers.
• Configure, and automate the deployment of Linux and VMware infrastructure through existing Kickstart/Jumpstart infrastructure.

Environment: HP UX 11.00/11.11/11.23/11.31, Solaris 9/10,VxVM, VCS, Oracle RAC, VMWARE, HP Servers, Netapp, HP storage XP12K/24K/P9500.