Unix/linux Systems Administrator Resume
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St Louis, MO
SUMMARY:
- Over 7 years of experience specialized in System Administration working on Red hat Linux, Ubuntu Linux, AIX, and Windows environments
- Good Experience with Linux Servers builds and Automation of server builds
- Knowledge of Dell servers and IBM P - Series
- Experience in administering AIX & Linux
- Experience in Installation, Configuration, Backup, Recovery, Maintenance, Support of AIX & Linux
- Experience in Installing, upgrading and configuring RedHat Linux 3.x, 4.x, 5.x using Kickstart Servers and Interactive Installation
- Experience in Creation and managing user accounts, security, rights, disk space and process monitoring in AIX and Red hat Linux.
- Installation and upgradation of Packages and Patches configuration mgmt., version control, service pack. & reviewing connectivity issue regarding security problem.
- Experience in installation and maintenance of IBM AIX 5.3/6.1/7.1
- Experience in AIX System LVM, with filesystems, paging space, dump devices, resizing Dump devices
- Experienced in configuring networks using smit mktcpip and smit chinet
- Knowledge of networking (TCP/IP, Ethernet), DHCP, NIS, DNS, NFS
- Experienced in working with SAN to allocate disks and troubleshoot path issues
- Experienced in working with Business Units to plan and implement Disaster Recovery
- Experience performing upgrades from OS 5.3 to 6.1 and 7.1
- Experienced in using sysback to backup and restore mksysbs, datavgs and appvgs
- Experience with Storage array migrations
- Experience performing storage migrations
- Experience restoring servers using mksysb lppsource through NIM master
- Experience in virtualization and configuration utilizing IBM HMC with PowerVM
- Experience to use NIM to install, manage, troubleshoot and restore LPARs
- Experience Decommissioning servers
- Experience on working with multiple ticket tools, including in house, USD, Maximo, SBM, Remedy ticketing tool, to generated and solve tickets
- Experience in configuration of NIS, NIS+, DNS, DHCP, NFS, LDAP, SAMBA, postfix, sendmail, ftp, remote access, security management and Security trouble shooting skills
- Worked with Database administrators to tune kernel for Oracle installations
- Experience with Veritas Volume Manager (VxVM), Veritas File System (VxFS), Veritas Net Backup, Veritas Clustering with SAN, NAS environment
- Experience in administering VMware Infrastructure Client 3.5 and vSphere 4.0
- Experience in Installation of Oracle and MYSQL
- Experience writing shell scripts to automate the administrative tasks and management using cron and enabling system logging, network logging of servers for maintenance, performance tuning, testing
- Experience working in SAN environment like EMC Symmetrix and Clariion series arrays
- Creating Linux Virtual Machines using VMware Virtual Center and AIX LPARs on P550 and P570
- Exposure to CI tools like Jenkins, Bamboo, Cruise Control
- Experience in Installing Firmware Upgrades, kernel patches, systems configuration, performance tuning on Unix/Linux systems
- Good understanding of F5’s Big IP hardware to load balance web and middle-tier servers
- Hands on experience using Chef and Puppet tools to automate
WORK EXPERIENCE:
Confidential, St. Louis, MO
Unix/Linux Systems Administrator
- Provided support for implementation troubleshooting, root cause analysis, and updates of applications on servers
- Effectively prioritize workload and consistently deliver assignments on-time
- Worked with different business units to meet timelines for patching and migration projects
- OS Installations and configuration use NIM to install, manage, troubleshoot and restore LPARs
- Create mksysb backup, and build fresh AIX server using mksysb and lppsources from NIM
- Creating and cloning Linux Virtual Machines templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts
- Build and maintain Dev servers, PT servers, and Prod servers
- Experience working with IBM HTTP/Apache Web Servers/Apache Tomcat in AIX and Linux environment.
- RPM package installations, patch and server management
- Setting up network environments using TCP/IP
- Configured networks using smit mktcpip and smit chinet
- Fine tuning of Servers
- Experience in AIX System LVM, with filesystems, paging space, dump devices, resizing Dump devices
- Troubleshooting errpt and coordinating with IBM System Support Center for hardware replacement as needed.
- Administration of RHEL and AS 5, 6, 7 which includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
- Hands on experience in installing, integrating, tuning and troubleshooting Apache, Chef, puppet, bash, perl, python, Tomcat, WebSphere and WebLogic application server.
- Installation of various flavors of Linux operating system like redhat, fedora, centos, Ubuntu.
- Assist Developers with isolation and resolution of application issues which are service, operating system, or hardware related
- Installing RedHat Linux using KickStart and applying security polices for hardening the server based on the company policies
- Installing, configuring WebLogic 10.3, Apache and integrating.
- Experience in VMware ESX Server environments
- Implemented automated Backup management solution through Shell scripting SSH & RSYNC
- Partitioning according to requirements, creating new file systems or growing existing one over the hard drives and managing file systems.
- Set up user and group login ID's, password, resolving permissions issues, user and group quota
- Worked with IBM support to get custom ifixes to fix OS bugs
- Submit and resolve Change Management tickets
Confidential, Phoenix, AZ
Linux/AIX Administrator
- Coordinate with Architects, PMs, Storage team, Application team, Network team, Managers, Stake holders for completion and on time delivery of projects
- Request Change management and deliver per approval
- Coordinate with App owners, DBAs, users, developers and vendors to resolve issues
- DR testing Quarterly
- Hands on experience in troubleshooting with hardware and software support resources locally and remote to diagnose issues
- Built LPARS using mksysb and lppsources from NIM
- Assist Developers with isolation and resolution of application issues which are service, operating system, or hardware related.
- Managed user accounts and access via active directory, exchange, and group policy.
- Involved in development, user acceptance, and performance testing of production & disaster recovery servers.
- Served as the point of contact for administration of the MySQL servers.
- Performed storage migrations.
- Insured all the correct users and Security Groups were added to the replacement systems from Active Directory.
- Worked on restructuring the Active Directory user structure to having Security groups and members within that group added to the different Domain Servers.
- Built and patched Fresh AIX 7.1 LPARS
- Implemented SUDO, SSH, security tools
- Mirrored rootvg on servers with internal disks
- Create mksysb backup using nim
- Build and maintain Dev, PT, and Prod servers
- Built HA cluster servers and Supported POWERHA Environments
- Upgraded AIX 6.1 to AIX 7.1 using NIM
- Worked on HMC 6 and 7 and Creating LPARs using HMC
- Created VG, LVM, with filesystems, paging space, dump devices, and resizing Dump Devices
- Build GPFS Cluster servers
- Installation of GPFS, maintenance, and create GPFS FS
- GPFS NSD disk migration
- Setting up network environments using TCP/IP
- Worked on Fiber networks and cabling.
- RPM package installations, patch and another server management.
- Provided support to EMC SAN team from server aspect.
- Hands on experience using Chef and Puppet tools to automate.
- Creating profiles, manifests for new servers, and pushing them to servers using puppet.
- Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing
- Worked and performed data-center operations including rack mounting, cabling
- Experienced in Troubleshooting critical hardware and software issues and day-to-day user trouble ticket.
- Use SBM ticketing tool for raising tickets and resolving tickets.
Confidential
AIX/Linux Administrator
- Hands on experience in Incident Management.
- Applied appropriate support packages/patches to maintain system integrity.
- Performed capacity analysis, monitored and controlled disk space usage on systems.
- Software and Hardware upgrades of AIX systems
- Adding servers to domain and managing the groups and user in AD, installing and configuring Sendmail.
- Installation and configuring of SUN and Linux servers
- Software and Hardware upgrades of AIX systems
- Installation and administration of RHEL 4, 5, 6, and Cent OS 5
- Configured Kickstart server and updating/applying patches to the servers using Redhat Satellite server
- Creating, cloning Linux Virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts
- Assisted in configuring the application servers with other components such as database, web servers, LDAP directory, Active Directory, BEA Web logic etc.
- Responsible for maintenance of development tools
- Installed, configured AIX 5.3, 6.1 on IBM p, x series servers using NIM, creating LPARs using HMC on p series servers
- Creating virtual machines using Xen and deploying OS, managing hardware.
- Creating, installing, WebLogic Application servers, deploying WAR, JAR files on them installed on Linux servers
- Designing Firewall rules for new servers to enable communication with application, Oracle 10g servers
- Worked on resolving production issues and documenting Root Cause Analysis and updating the tickets using BMC Remedy
- Fine tuning of Servers and configuring networks for optimum performance
- Setting up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents, DHCP and Proxy
- Installation, maintenance and administration of Oracle and Db2 Server on Sun Servers
- Hands on experience in installing, integrating, tuning and troubleshooting Apache, Tomcat, WebSphere and WebLogic application server
- Installed and Configured WebSphere Application Servers on Linux and AIX
- Regular disk management like adding / replacing hot swappable drives on existing servers/workstations
- Expertise in backup/restore with tar