• Experienced in managing, supporting, troubleshooting, hardening Linux servers for large enterprise network 5000+ severs.• Installed, configured, and performed OS upgrades on RHEL 6.X/7.X, SUSE 10.X/11.X systems.• Managed day-to-day tasks for all Linux/Unix servers within the environment.• Administered, implemented, supported, and resolved complex issues in VMWare, Linux, AIX, and Solaris environments.• Executed ongoing infrastructure maintenance and enhancements, involving… Show more • Experienced in managing, supporting, troubleshooting, hardening Linux servers for large enterprise network 5000+ severs.• Installed, configured, and performed OS upgrades on RHEL 6.X/7.X, SUSE 10.X/11.X systems.• Managed day-to-day tasks for all Linux/Unix servers within the environment.• Administered, implemented, supported, and resolved complex issues in VMWare, Linux, AIX, and Solaris environments.• Executed ongoing infrastructure maintenance and enhancements, involving off-hours activities.• Oversaw backup and recovery operations for various servers.• Implemented volume management, disk management, and software RAID solutions using Logical Volume Manager.• Operated in a multi-platform, multi-operating system, multi-component environment with numerous servers builds and configurations.• Conducted User Account Management, data backups, and user logon support.• Utilized scheduling tools like Control M and Autosys to set up jobs for backups and monitoring processes.• Configured networking concepts such as NIS, NFS, SAMBA, LDAP, SSH, SFTP, SNMP, DNS, DHCP, and troubleshooted network issues.• Monitored system activities, including CPU, memory, disk, and swap space usage to prevent performance issues.• Employed YUM configuration for patching servers to the latest OS/Kernel version.• Configured and managed virtual disks, disk mirrors, and RAID 0, 1, and 5 levels.• Developed shell scripts for CRON jobs to check disk usage and perform file system clean-ups in different environments.• Automated processes for installing, configuring, and maintaining networking tools like NFS, NTP, FTP, SFTP, and troubleshooting.• Provided 24x7 support for servers and participated in rotating on-call pager responsibilities for the production environment.Environment: Red Hat Enterprise Linux 6/7/8, VMware, Perl, Python, WAS 5/6/7, Splunk, Logical Volume Manager, WebSphere application server 7.x, Tomcat, IBM/HTTP, NFS, FTP, NTP, SFTP. Show less

• Installed, configured, and maintained RedHat Linux 6.3, managing HP and DELL servers running on RedHat Linux, SUSE Linux 9, and GNU.• Conducted Linux kernel and memory upgrades, administered swap areas, and executed RedHat Linux Kickstart Installations. Configured DNS, DHCP, NIS, NFS, and other network services in RedHat Linux.• Performed daily backups, data restoration on request using VERITAS NetBackup, and participated in server consolidation and virtualization using HPSA vSphere… Show more • Installed, configured, and maintained RedHat Linux 6.3, managing HP and DELL servers running on RedHat Linux, SUSE Linux 9, and GNU.• Conducted Linux kernel and memory upgrades, administered swap areas, and executed RedHat Linux Kickstart Installations. Configured DNS, DHCP, NIS, NFS, and other network services in RedHat Linux.• Performed daily backups, data restoration on request using VERITAS NetBackup, and participated in server consolidation and virtualization using HPSA vSphere virtual infrastructure and HPSA vSphere ESX.• Developed Shell Scripts as cron jobs and deployment scripts using VIM editor. Conducted server audits post-installation and prepared documentation.• Utilized EMC disk storage for disk space allocation and performed network troubleshooting using 'ndd,' 'traceroute,' 'netstat,' 'ifconfig,' and 'snoop.'• Ensured security and resolved network issues for an environment with 2500 users with VPN access.• Installed required software, patches, and documentation, handled licensing troubleshooting, and implemented network monitoring using Nagios tool.• Set up various user profiles, environment variables, and security measures for smooth operation.• Monitored servers with BMC patrol Express and demonstrated a good understanding of web services software architectural and design issues.• Oversaw overall system performance, conducted user management, system updates, and disk storage management.• Created and managed user permissions-maintained User File System quotas on red hat, Linux and AIX.• Provided production support for Apache and JBoss, including installation, configuration, management, and troubleshooting.• Implemented RAID 1 and RAID 5 on mission-critical servers, such as domain controllers and file servers.• Established full networking services and protocols on UNIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, TCP/IP, ARP, applications, kickstart, and print servers for optimal functionality. Show less

• Installed servers based on Solaris 8, 9, and RedHat Linux within development, test, and production environments.• Conducted installation, configuration, and upgrades of Sun Solaris, HP-UX, Linux, and AIX.• Monitored hardware and software on Sun and RedHat Linux systems, addressing issues based on alerts and system-generated errors in both Production and Development environments.• Implemented proactive maintenance through timely patch upgrades, batch job scheduling, and cron job… Show more • Installed servers based on Solaris 8, 9, and RedHat Linux within development, test, and production environments.• Conducted installation, configuration, and upgrades of Sun Solaris, HP-UX, Linux, and AIX.• Monitored hardware and software on Sun and RedHat Linux systems, addressing issues based on alerts and system-generated errors in both Production and Development environments.• Implemented proactive maintenance through timely patch upgrades, batch job scheduling, and cron job management.• Installed and configured Oracle RAC on Linux and Solaris servers.• Coordinated projects, overseeing the evaluation, installation, monitoring, and maintenance of server software on various hardware platforms.• Managed disk resources, including adding/replacing hard drives, partitioning, creating new file systems, and expanding existing ones.• Installed and configured Logical Volume Manager (LVM) and Veritas Volume Manager on Sun Solaris and RedHat Linux hardware.• Configured UNIX server services, devices, and applications, collaborating with application teams to customize the environment.• Maintained volumes and file systems using VxVM/VxFS for Oracle.• Utilized VxVM for tasks such as adding disks, creating new disk groups/volumes, resizing, and importing/exporting disk groups between servers.• Installed and configured Apache, SSL, SSH, PHP, and Perl on SUN Solaris.• Established network environments using TCP/IP, NIS, NFS, DNS, SNMP agents, DHCP, and Proxy.• Created user accounts, mounted home folders, and addressed user queries related to mounting issues.• Conducted day-to-day user administration, including adding/deleting users, and managing user queries.• Performed systems monitoring, upgrades, performance tuning, and backup and recovery.• Engaged in user maintenance and performance tuning for all servers.Environment: Sun Solaris (8, 9), AIX (4.2), HP-UX (11.0), Windows-2000/2003, Sun Ultra E 4800/3000/450/250, Sun Fire 4800/3800, HP-9000, RS-6000, Veritas Show less

• Managed UNIX Systems on clustered Sun Servers with Dynamic LPARs and fiber-attached SAN storage.• Deployed Red Hat Enterprise Linux on Dell servers through network installations using Kickstart.• Contributed to the creation of technical design specifications, overseeing the installation and configuration of Red Hat Linux, SUN Solaris, and IBM AIX Servers.• Oversaw SUSE Enterprise Linux 9 and Red Hat Enterprise Linux 5.x servers in various environments, proactively monitoring and… Show more • Managed UNIX Systems on clustered Sun Servers with Dynamic LPARs and fiber-attached SAN storage.• Deployed Red Hat Enterprise Linux on Dell servers through network installations using Kickstart.• Contributed to the creation of technical design specifications, overseeing the installation and configuration of Red Hat Linux, SUN Solaris, and IBM AIX Servers.• Oversaw SUSE Enterprise Linux 9 and Red Hat Enterprise Linux 5.x servers in various environments, proactively monitoring and administering both production and development servers.• Applied patches and packages for UNIX (Sun Solaris, HP-UX) and Linux Servers (Red Hat, SUSE), addressing issues arising from these updates.• Implemented Virtualization with VMware ESX Server on Linux, specifically on HP-460C Blade and Dell-2950.• Conducted Server consolidation and virtualization using VMware infrastructure, incorporating VMware ESX, VMWare Virtual Center, and Virtual SMP.• Deployed high-availability applications based on the Unix/Java stack, particularly the JBoss Application server on Red Hat Linux OS.• Offered support for Red Hat JBoss 4.x and Apache Tomcat 2.x, as well as ATG applications, focusing on installation and configuration operations.• Implemented cluster systems on IBM Systems p servers and monitored them using IBM HACMP 5.2.• Demonstrated proficiency in using the IBM Hardware Management Console to build and partition IBM Power5 and Power5+ servers, conducting NIM Installations on LPAR.• Utilized Python for processing various types of data, including text, numbers, images, scientific data, etc., on computer systems.• Executed Disk Mirrors and RAID 0, 1, and 5 configurations on multiple UNIX and Linux servers.• Collaborated with Database administrators to optimize the kernel for Oracle installations on Linux.Environment: Red Hat Enterprise Linux 4.x/5.x, IBM AIX 5L 5.x, Sun Solaris 9/10, SUSE 9/10, Dell PowerEdge 1650/1750/2950, System p Series 570/590/630/670/P690, HP 460C, VMWare ESX Show less