linux/aix system admin

Summary:

*+ years of IT experience in AIX/Red Hat/Unix System Administration in heterogeneous environments.

Worked on networking protocols TCP/IP, SCP, SFTP, SMTP, HTTP, NFS, etc.

Implementation, Installation, Configuration, Troubleshooting and Administration of UNIX Platform.

Experience on IBM p servers (p4, p5, p6 and P7), HACMP, LPAR, VERITAS, NIM, HMC, GPFS, shell scripting.

Storage and networking concepts and also third party office applications installation and maintenance.

Extensive Experience working in IBM PowerVMs.

Good exposure in new project implementation as per the requirement.

Installed, Applied patches/file sets, fix packs, rpm’s, YUM, security fixes, troubleshooting,AIX 7.1/6.1 and RHEL 7.1/6.x/5.x. via Big-fix (TEM).

OS (AIX and RHEL) Version upgrades, and updates.

Involved actively in Hardware Provisioning and Software Application Migration.

Creating iscsi target and initiator, mapping iscsi disk to iscsi client.

Security hardening Operating system level and Hardware level.

Converted user accounts to LDAP from local on AIX and RHEL worked with IAM team.

Installed and configured nfs and samba servers.

Installed and configured HTTPD server and Configured load balancing.

Configured network interface bonding and teaming.

RHEL installation using kickstart method .

Worked on configuration of SeLinux policy using policycoreutils.

Worked on configuraton of firewalld for network trafic management.

Extensive experience with VMware Virtualization in Red hat servers

Experience in supporting and monitoring high availability (HA) system based on IBM HACMP .

Strong technical support background includes troubleshooting and repair of networks, hardware and software.

Experience monitoring network in and out communication from AIX/Red Hat servers.

Experience in Maintaining and managing servers to ensure High availability and High performance of application hosted on the servers.

Exposed in corporate disaster recovery planning and procedures

Experienced with Tivoli Monitoring Environment

Hands-on experience in setting up network environment using NFS and NIS

Expert in FTP usage

Taking manual TSM backups and restoring files from TSM backup servers as per client requirement.

Proficient in creating TSM profiles

Proficient in creating and maintaining project plans using MS Excel

Solid understanding of backup schedules and TCP/IP process

Excellent documentation skills of on-going activities within the project and specific detailed documentation of each and every servers functions and application configuration

Made recommendations of hardware depending on current resource usage and future forecasting of an application with the use of Sun Management Center

Involved in Setup and Configuration of Puppet Configuration Management.

Installed and configured an automated tool Puppet that included the installation and configuration of the Puppet master, agent nodes and an admin control workstation

Created and updated Puppet manifests and modules.

Installed/Configured/Managed Puppet Master/Agent. Wrote custom Modules and Manifests, downloaded pre-written modules.

Experience working with Puppet Enterprise and Puppet Open Source.

Trainings:

AIX 7.1 Training and Hands on Lab.

Certifications:

IBM Certified System Administrator AIX V1.

Technical Skill Set:

Operating systems :

AIX 5.3, 6.1 & 7.1,RHEL 5,6,7

Scripting Languages :

Shell Scripting

Clustering :

IBM AIX HACMP,VERITAS cluster, VMware cluster HA

Networking :

TCP/IP,OSI and Routing Protocols,DNS,DHCP

Tools :

Puppet, SMIT, Remedy ITSM

Educational Qualification:

Bachelor of Technology (Computer Science) from Uttarakhand Technical University, India.

Professional Experience:

IBM Research Lab Jan 2016 to till date

Austin, TX

Sr UNIX/AIX/Red Hat Server Administrator

Responsibilities

Responsible for end to end operational activities related to AIX and Red Hat Linux for projects maintaining more than 1000 servers.

Responsible for managing IBM Internal servers for USA users, hosting applications like Lotus Notes, Websphere, Tivoli, Oracle etc.

Maintenance of Linux and AIX servers in Dev/Test/DR/Prod environments, installed tools like NMON, SMIT, Directoragent, Tivoli agent.

Responsible for critical changes and incidents.

Good exposure in new project implementation as per the requirement.

IInvolved actively in Hardware Provisioning and Software Application Migration.

Creating iscsi target and initiator, mapping iscsi disk to iscsi client.

Security hardening Operating system level and Hardware level.

Converted user accounts to LDAP from local on AIX and RHEL worked with IAM team.

Installed and configured nfs and samba servers.

Configured network interface bonding and teaming.

RHEL installation using kickstart method .

Worked on configuration of SeLinux policy using policycoreutils.

Worked on configuraton of firewalld for network trafic management.

installed and configured Apache HTTPD and created namebased,ipbased virtual host.

working with systemd and sysstat.

Expertise in systems administration and support on AIX, and good experience on LPAR, NIM, HACMP and VERITAS administration.

Perform LPAR activities (Resource allocation, Move resource from one LPAR to another LPAR).

Good experience in updating ML / TL / Fixes / APARs on standalone and HACMP / VERITAS Cluster servers

Good experience in HA upgrade and service pack update.

Installing AIX using NIM and having experience in NIM troubleshooting.

Backup and Restore the OS image by using NIM and Tape.

LVM administration and user administration in AIX/Red Hat servers.

Creating Volume Group, Logical volumes and file systems in both stand-alone and HA / GPFS cluster environment.

Performing DR (Disaster recovery) activities in LINUX Red Hat and AIX servers by using SAN replication and complete restoration.

All system backups and restores using NetBackup on Linux machines. SAN and iSCSI disk configuration on Linux. Performance tuning of the Linux virtual machines

Taking care of system backups (mksysb&savevg) using scripts to TSM server and restoring the backups when customer needs.

Handling server decommission and server activation activities.

Installing and Maintaining Software Packages & Patches.

Knowledge on IT Security Standards to keep the servers compliant in order to avoid intruders to

hack the servers.

Working on network related issues, configuring network interface cards, assigning IP addresses, aliasing etc.

Involved in supporting RHEL 5.x /6.x/7.x environment performing activities like LVM, Networking, Kickstart and bonding.

Configuring NFS and apache servers in AIX and Red Hat environment.

Configured VMware HA, VMware DRS in acquiring higher efficiency for VMware Infrastructure.

Created and documented process for deploying Virtual machines on VMware and used Remedy Tool for ticketing (Change Management, Incident Management, and Request Management) and looking after high priority incident tickets both on virtual machine and ESX host level.

Experience working on EMC SAN storage technologies in DR site and with Cisco UCS and HP C7000 Blades for ESXi hosts.

Performed daily maintenance routines on servers, monitored system access, managed file space and tuned the system for optimum performance.

Experience in Installing, Configuring and Maintaining RedHat Linux (RedHat Enterprise Linux 5.x & 6.x 7.x) Servers and Windows 2003/ 2008 R2 Servers on Power Edge Model rack, HP blade centers like HP

Experience supporting RedHat servers in Production and Development environments.

Experience in Virtualizing RedHat servers using vSphere 5.1/5.5/6.0 and managed ESXi servers using vCenter and also worked with ESXi Clusters.

Installedand ConfiguredRedHat LinuxKickstartand booting from SAN and managing multipathing at boot level and OS level using EMC Powerpath.

Experience in writing scripts to automate jobs and debugging scripts.

Experience in using protocols like NIS, NFS, SSH, SFTP & DNS.

Conduct incident management trend analysis within the supported production environment.

Administered Volume groups and volumes using Logical volume manager.

Configured File Systems, users and group for Oracle and Websphere.

Expertise in Configuring Bonded Interfaces for networking and Managing storage using LVM in RHEL Operating Systems.

Configuration and Administration of NFS, DHCP, FTP, LDAP and Sendmail.

Responsible for Kernel tuning, upgrading of memory and swap area on Linux servers.

Installation and configuration of applications like Tomcat, Apache .

Provide support to the application team and troubleshoot the system related, networking issues and application errors during deployments and performance tests.

Updating and upgrading ESXi servers, vCenter Server, using vSphere Update Manager and VM Tools through manual updates.

Managed ESXi hosts using vCenter Server/ vSphere Client and VMware Web Client.

Performed vMotion and Storage vMotion of Virtual Machines across different cluster with respect to security policies and application development requirements.

Creation of hot and cold Clones Templates from Virtual Machines (VMs) . Deployed Virtual Machines from Templates based on requirements and build documents.

Performed Virtual Machine Snapshots for Application machines for Migrations and failback.

Experience with creating Standard vSwitches (vSS), Distributed vSwitches (vDS) . Isolated networks were created with separate vSwitches and VMkernel Port Groups. Third party tools such as Wireshark packet capturing tool were used for network traffic monitoring, vMotion, storage and Fault-Tolerance (FT) security and stability.

Handled VMware solutions to support multiple storage connectivity options such as Fiber Channel-SAN, iSCSI, NFS (NAS)

Environment: Red Hat Enterprise Linux 5.x/6.x, VERITAS Volume manager, Veritas File System, Veritas Cluster Server, VMware ESXi sever, VMware Update Manager, SRM, Remedy.

Involved in Setup and Configuration of Puppet Configuration Management.

Installed and configured an automated tool Puppet that included the installation and configuration of the Puppet master, agent nodes and an admin control workstation .

Created and updated Puppet manifests and modules, files, and packages stored in the GIT repository.

Installed/Configured/Managed Puppet Master/Agent. Wrote custom Modules and Manifests, downloaded pre-written modules.

Experience working with Puppet Enterprise and Puppet Open Source.

Westpac banking corporation (Leading Australian Bank) July 2013 to Dec 2015

Sr UNIX/AIX/Red Hat Server Administrator

Responsibilities

•Responsible for end to end operational activities related to AIX and Red Hat Linux for projects maintaining more than 1500 servers.

•Maintenance of Linux and AIX servers in Dev/Test/DR/Prod environments, installed tools like NMON, SMIT, Directoragent, Tivoli agent.

•Responsible for critical changes and incidents.

•Good exposure in new project implementation as per the requirement.

•Expertise in systems administration and support on AIX, and good experience on LPAR, NIM, HACMP and VERITAS administration.

•Perform LPAR activities (Resource allocation, Move resource from one LPAR to another LPAR).

•Good experience in updating ML / TL / Fixes / APARs on standalone and HACMP / VERITAS Cluster servers

•Good experience in HA upgrade and service pack update.

•Installing AIX using NIM and having experience in NIM troubleshooting.

•Backup and Restore the OS image by using NIM and Tape.

•LVM administration and user administration in AIX/Red Hat servers.

•Creating Volume Group, Logical volumes and file systems in both stand-alone and HA / GPFS cluster environment.

•Performing DR (Disaster recovery) activities in LINUX Red Hat and AIX servers by using SAN replication and complete restoration.

•All system backups and restores using Tivoli storage manager on Linux machines.

•SAN and iSCSI disk configuration on Linux. Performance tuning of the Linux virtual machines

•Taking care of system backups (mksysb&savevg) using scripts to TSM server and restoring the backups when customer needs.

•Handling server decommission and server activation activities.

•Installing and Maintaining Software Packages & Patches.

•Installation, configuration of puppet master and agents and knowledge of creating manifests for puppet agents.

•Installation and configuration of SAMBA on Unix Servers.

•Working on network related issues, configuring network interface cards, assigning IP addresses, aliasing etc.

•Updating the Firmware on the Managed Systems, HMC.

•Troubleshooting and Coordination on hardware related problems.

•Troubleshooting and fixing OS kernel errors and application software problems.

•Send mail configuration and troubleshooting

•Working on backup related issues in both server and TSM side.

•Recovering root password, replacing failed hard disks, making disks high available by mirroring volume groups, logical volumes.

•Understanding of booting process, fixing booting issues, re-writing boot records, working with maintenance modes.

•Working with AIX system management interface tool (smit), going through smit logs etc.

•Performing alternate disk installations, multi BOS installation and reduce down time while performing installations or TL/ML up gradations.

•Configure NFS server and client and work on NFS issues if any.

•Experience on incident and change management. Raising, updating, implementing, and closing changes with coordination with various application teams.

•Involved in supporting RHEL 5.x /6.x/7.x environment performing activities like LVM, Networking, Kickstart and bonding.

•Configured VMware HA, VMware DRS in acquiring higher efficiency for VMware Infrastructure.

•Created and documented process for deploying Virtual machines on VMware and used Remedy Tool for ticketing (Change Management, Incident Management, and Request Management) and looking after high priority incident tickets both on virtual machine and ESX host level.

•Experience working on EMC SAN storage technologies in DR site and with Cisco UCS and HP C7000 Blades for ESXi hosts.

•Performed daily maintenance routines on servers, monitored system access, managed file space and tuned the system for optimum performance.

• Experience in Installing, Configuring and Maintaining RedHat Linux (RedHat Enterprise Linux 5.x & 6.x 7.x) Servers and Windows 2003/ 2008 R2 Servers on Power Edge Model rack, HP blade centers like HP

• Experience supporting RedHat servers in Production and Development environments.

• Experience in Virtualizing RedHat servers using vSphere 5.1/5.5/6.0 and managed ESXi servers using vCenter and also worked with ESXi Clusters.

•Installedand ConfiguredRedHat LinuxKickstartand booting from SAN and managing multipathing at boot level and OS level using EMC Powerpath.

• Experience in writing scripts to automate jobs and debugging scripts.

•Experience in using protocols like NIS, NFS, SSH, SFTP & DNS.

•Conduct incident management trend analysis within the supported production environment.

•Administered Volume groups and volumes using Logical volume manager.

•Configured File Systems, users and group for Oracle and Websphere.

•Expertise in Configuring Bonded Interfaces for networking and Managing storage using LVM in RHEL Operating Systems.

•Configuration and Administration of NFS, DHCP, FTP, LDAP and Sendmail.

•Responsible for Kernel tuning, upgrading of memory and swap area on Linux servers.

•Installation and configuration of applications like Tomcat, Apache .

•Provide support to the application team and troubleshoot the system related, networking issues and application errors during deployments and performance tests.

•Updating and upgrading ESXi servers, vCenter Server, using vSphere Update Manager and VM Tools through manual updates.

•Managed ESXi hosts using vCenter Server/ vSphere Client and VMware Web Client.

•Performed vMotion and Storage vMotion of Virtual Machines across different cluster with respect to security policies and application development requirements.

•Creation of hot and cold Clones Templates from Virtual Machines (VMs) . Deployed Virtual Machines from Templates based on requirements and build documents.

• Performed Virtual Machine Snapshots for Application machines for Migrations and failback.

•Experience with creating Standard vSwitches (vSS), Distributed vSwitches (vDS) . Isolated networks were created with separate vSwitches and VMkernel Port Groups. Third party tools such as Wireshark packet capturing tool were used for network traffic monitoring, vMotion, storage and Fault-Tolerance (FT) security and stability.

•Handled VMware solutions to support multiple storage connectivity options such as Fiber Channel-SAN, iSCSI, NFS (NAS)

•Environment: Red Hat Enterprise Linux 5.x/6.x, VERITAS Volume manager, Veritas File System, Veritas Cluster Server, VMware ESXi sever, VMware Update Manager, SRM, Remedy.

Qantas Airlines (Australia) Nov 2012 to June 2013

Sr UNIX/AIX Server Administrator

Responsibilities:

Responsible for monitoring systems performance and troubleshoot system / network bottlenecks.

Performed Security on users, groups administration and daily backup and restore operations, networking service, performance, and resource monitoring.

Maintained the servers for the system uptime, patch management, and user management

Replaced failed components like Ethernet/ fiber channel adapters, power supplies, and disks to avoid down time.

Performed installation, periodic maintenance updates and applied patches and kernel fixes.

Setup and managed user accounts, and changed user attributes based on users requests, and troubleshoot login issue by configuring NFS/NIS settings.

Setup cron jobs schedules for various backup and monitoring tasks.

Assisted in setup and configuration of network TCP/IP on SUN and IBM servers including RPC connectivity for NFS.

Performance monitoring done with conventional tools like sar, topas, nmon, iostat&netstat.

Monitored system activities, log maintenance and disk space management.

Created Magic tickets for problem notification and documentation purposes and opening of Cases with Sun Microsystems and various vendors for unresolved issues.

Expertise in systems administration and support on AIX, and good experience on LPAR, NIM, HACMP and VERITAS administration.

Perform LPAR activities (Resource allocation, Move resource from one LPAR to another LPAR).

Good experience in updating ML / TL / Fixes / APARs on standalone and HACMP / VERITAS Cluster servers

Good experience in HA upgrade and service pack update.

Installing AIX using NIM and having experience in NIM troubleshooting.

Backup and Restore the OS image by using NIM and Tape.

LVM administration and user administration in AIX/Red Hat servers.

Creating Volume Group, Logical volumes and file systems in both stand-alone and HA / GPFS cluster environment.

Performing DR (Disaster recovery) activities in LINUX Red Hat and AIX servers by using SAN replication and complete restoration.

All system backups and restores using NetBackup on Linux machines. SAN and iSCSI disk configuration on Linux. Performance tuning of the Linux virtual machines.

Production Support 24x7 On call

IBM India Jan 2011to Oct 2012

UNIX/AIX Server Administrator

Responsibilities:

Performed Security, users and group administration and daily backup and restore operations, networking service, performance, and resource monitoring.

Performed a routine check on nodes syslogs and errorlogs for system and hardware errors.

Configured HMC service agent for automated service call and LPAR monitoring.

Provided hardware support to the application development team. Replaced failed components like Ethernet/ fiber channel adapters, power supplies, and disks etc to avoid down time.

Ran scripts for LVM configuration change like LV size extensions and FS extensions.

•Performed installation, periodic maintenance updates and applied APAR fixes.

•Setup and managed user accounts and changed user attributes and troubles hooted login issues.

•Assisted in creation of NFS file system exports for data movement and configured network interfaces in control workstation.

•Assisted in configuration of nodes as NIS masters and slaves based on SP complex requirements and monitored NIS slaves for all the updated NIS maps.

•Setup cron jobs schedules for various backup and monitoring tasks.

•Assisted in setup and configuration of network TCP/IP on AIX,Red Hat servers including RPC connectivity for NFS.

•Performance monitoring done with conventional tools like sar, topas, nmon, iostat&netstat .

•Monitored system activities, log maintenance and disk space management.

•Assisted in opening of tickets for problem notification and documentation purposes and opening of PMR with IBM for unresolved issues.

Jr System administrator Jan 2010 to Dec 2011

HCL Infosystems India

Process Level 1 service tickets that arrive in the queue

Administer desktop computers, servers, printers, routers, switches, phones, and security updates

Review system/backup logs and troubleshoot issues

Troubleshoot LAN connectivity issue

Provide on call, and remote support to end-users.

Create and modify user accounts

Maintain an inventory of deployed hardware, software, and available equipment

Create and maintain technical documentation

Maintains efficient operation of multi-user computer systems, including coordination with network administrators.

Interacts with users and evaluates vendor products.

Monitor and enforce corporate IT policies and standards for computing system security compliance.

Setting up administrator and service accounts, maintaining system documentation, tuning system performance, installing system wide software.

Performing Connectivity troubleshooting, TCP/IP, Dial-up, Token Ring, Ethernet, LAN/WAN.

Monitoring Remedy queues and assigning tickets to team member based on severity and criticality of opened tickets.

Contact this candidate