SUMMARY:

• Around 16 years of Professional experience in the following areas.
• Installation, configuration and administration of RHEL 3/4/5/6/7, CentOS 6/7, SUSE Linux 10/11/12, Sun Solaris 8/9/10/11, Ubuntu and HP - UX Servers.
• Good experience in upgrading production, development and QA servers from RHEL 5 to RHEL6/7 and from Solaris 9 to Solaris 10.
• Well experienced in migration and consolidation of RHEL, CentOS, SUSE Linux and Sun Solaris Servers in Production data center.
• Involved independently in supporting and troubleshooting the issues in High Availability Production Environment.
• Involved actively in 24/7 Production On-Call support for RHEL, CentOS, SUSE and Sun Solaris servers, Online Web Applications, BI Applications and Web Servers.
• Experienced in configuration, administration and troubleshooting the Weblogic /Tomcat Application and Apache Web Servers.
• Involved in supporting ESX 3/5 VMware Infrastructure environment.
• Involved in configuring Kickstart, Red Hat Satellite, Spacewalk and Jumpstart Installations.
• Involved in Puppet Configuration.
• Good experience in Veritas products such as Volume manager 5.0(VxVM) and Veritas Clustering (VCS).
• Good exposure in configuring, administration and troubleshooting Unix Servers which are connected to Hitachi, EMC, HP and NetApp SAN.
• Involved in Backup systems such as Veritas Netbackup and other backup strategies.
• Designing UNIX shell scripts (ksh, Bash and C shells), Perl/Php scripting for job scheduling and Administration.
• Involved in Configuring and troubleshooting the Network issues related to DHCP, NFS, DNS, NIS and Sendmail .
• Involved in supporting F5 load balancers and Firewalls.
• Good experience in supporting and configuring applications on Oracle and MySQL database environments.
• Involved in Weblogic and Verisign SSL Cert installations and administration.
• Worked closely with DBAs and Application specialists while configuring, administering and troubleshooting the issues related to Databases and various Applications.
• Good experience in Installation of Packages, Patch Management and Upgrades.
• File system management, disk space and user management on various servers running under Linux and Solaris platforms.
• Performance monitoring and tuning on Production Application and Database servers.
• Good experience in Enterprise Monitoring tools such as Pandora, Observium, HP Openview, Nagios, Big Brother Hobbit and BMC.
• Involved in converting functional design into technical design.
• Involved in implementing Financial Applications, development, enhancements and resolving production Tickets.
• Worked on Version Control Systems like CA harvest, CVS, Git repository, Clearcase and VSS.
• Installation, Configuration and Administration of Windows NT/ 98/ 2000/2003/2008 Servers and Workstations.
• Involved in setting up and Configuration of Confidential R/3 4.7, Confidential BW 3.1 Servers.
• Good experience in Network Configuration and Management.
• Configuring TCP/IP, POP3, SMTP, SNMP, HTTP, FTP and SSH protocols.
• Setting up and Configuration of Routers, Switches, Hubs and Firewall.
• Implemented Security strategies and Disaster Recovery.
• Solving Hardware problems, dealing with hardware vendors, making hardware purchases and decision-maker in purchases.
• Excellent Leadership, Technical, Communication, Analytical and Problem solving skills.

TECHNICAL SKILLS:

Operating Systems: RHEL 3/4/5/6/7, CentOS 6/7, Sun Solaris 2.6/2.7/ 8.0/9.0/10.0 /11, Suse Linux 10/11/12, Ubuntu, SGI IRIX 6.5, HP-UX 10.0, Win95/98/NT/2000/XP, WinNT/ 2000/2003/2008 Server.

Shell Scripting: Korn shell, C shell, Bash, Perl, Python Sed and AWK programming.

Application Servers: Weblogic 9, Tomcat and ETL Informatica.

Monitoring Tools: Pandora, Observium, Nagios, HP Openview and Big Brother Hobbit.

Web Servers: Apache, Tomcat and SunOne Web Server.

Mail Server: Send Mail 8.0

RDBMS: Oracle 8.x/9.2/10.x/10g, MySQL.

SAN: Hitachi AMS 1000/9980/9990/9570 and Tagmastore USP,HP Storage Works, EMC Isilon, EMC Invista, Tintri and NetApp.

SAN Applications: Storage Navigator.

Veritas Products: Volume manager and Veritas clustering (VCS).

EAI Tools: TIBCO BusinessWorks, Tibco Designer 5.2

Confidential Technologies: Confidential BW 3.1, Confidential R/3 4.7 and Confidential ABAP

Networking: Ethernet LANs, WAN functionality.

Hardware: HP c9000,HP DL580/DL 380,HP c7000,Sun Fire 6900/6800, Sun Fire 15K, T5220, T2000, Sun Fire v490/280R/ V440/v480/v210/v120, X4100/X4500/X4540,Sun Netras,E10K, E6500, Compaq, HP, Intel 80x86 based computers, IBM, Dell, SGI Indigo, Octane, Cisco Router 2560/ 801,Adaptec SCSI RAID Controllers, Tape drives, Ncipher Payshield Security Device, RSC Card, ALOM Cards, Cyclades, Cisco Routers 2560/801,catalyst switches, CISCO IOS, Nortel Network and Brocade Switches, HP Laser Jet printers.

Protocols: TCP/IP, NetBEUI, SNMP, HTTP, POP3, SMTP, FTP and SSH.

PROFESSIONAL EXPERIENCE:

Confidential, Pleasanton,CA

Linux Administrator

• Involved in supporting and configuration of CentOS 6/7 Servers, administration and troubleshooting the issues.
• Supported HPC Cluster(SGE) environments with CentOS 6/7.
• Configured and supported Pandora monitoring and Observium Monitoring tools.
• Involved in configuration and administration of Ubuntu 14/16.04 LTS environment.
• Involved in supporting VMware Infrastructure.
• Involved in supporting and configuration of Spacewalk(Red Hat Satellite) server.
• Involved in troubleshooting various tickets through HPSM.
• Involved in supporting EMC Isilon and Tintri storage systems.
• Involved in Github disaster recovery implementation.
• Involved in Package and Patch Management.
• Designing UNIX shell scripts (ksh, Bash and C shells) and Perl scripting for job scheduling and Administration.

Environment: Cent OS 6/7, RHEL 6/7, Ubuntu 14/16.04, HPC Clusters(SGE), Pandora and Observium Monitoring tools, Oracle 10g, Tomcat Application Server, Apache Web Server, VMware ESX 5,Foreman, Puppet, Github, EMC Isilon, NetApp, HP and Dell Server hardware, NFS, Automounts, DNS, Cisco Router, Catalyst switches, Brocade, Firewalls, TCP/IP, SMTP, SSH, SNMP, Shell Scripts (Bsh, Ksh and Csh), Awk and Sed.

Confidential, San Jose, CA

Sr. Unix Systems Engineer/Tech Lead

• Involved in supporting and configuring RHEL 5.0/6.0 servers and Apache Web Servers for Cisco Archive Project.
• Independently involved in configuration of RHEL 5.0 Servers, administration and troubleshooting the issues.
• Supported Prod, dev and QA environments, which consists of Adobe CQ Content Management systems.
• Worked with Customers and assisted in design/architecture of new dev/QA/Prod environments For new web based Applications.
• Involved in supporting the applications on Oracle and MySQL database Environments.
• Configuration and administration of Big Brother Hobbit/Nagios Monitoring Tools.
• Involved in supporting system operations team and troubleshooting the issues.
• Involved in evaluating new technologies/tools with Architects.
• Involved in security hardening and capacity planning.
• Performance Monitoring and Tuning on Servers using Performance Tools.
• Involved in supporting VMware Infrastructure.
• Involved in Packages and Patch Management.
• Involved in Puppet configuration.
• Designing UNIX shell scripts (ksh, Bash and C shells) and Perl scripting for job scheduling and Administration.

Environment: RHEL 5.0/6.0 AS, Cent OS, Ubuntu, Open stack, AWS, Adobe CQ/WEM, Oracle 10g, MySQL, Tomcat Application Server, Apache Web Server, VMware ESX 5, Puppet, F5 Load balancers, Big Brother Hobbit, Nagios, PHP, Git repository, VMware, Cisco UCS, Hitachi SAN, HP and Dell Server hardware, NFS, DNS, NIS, Cisco Router, Catalyst switches, Brocade, Firewalls, TCP/IP, SMTP, SSH, SNMP, Shell Scripts (Bsh, Ksh and Csh), Awk, Sed, Perl and C.

Confidential, CA

Sr. UNIX System Admin

• Involved in configuration and administration of RHEL 3/5/6, Sun Solaris 10/11, SUSE Linux 10/11/12 and HP - UX Production, development and QA Servers.
• Involved in OS upgrades of Production, development and QA servers.
• Well experienced in supporting and troubleshooting the issues in High availability and Production Environment.
• Involved actively in 24/7 On-Call support for all data center servers.
• Involved in configuration, administration of Solaris 10 LDOM Infrastructure.
• Involved in SAN migration activities of production and development server
• Involved in supporting ESX 3/5 VMware Infrastructure environment.
• Involved in troubleshooting the issues related to HP-UX 10/11 and IBM AIX Servers also.
• Good experience in troubleshooting the Applications issues and Web Servers.
• Involved in Backup systems such as Veritas Netbackup.
• Involved in troubleshooting Veritas products( VxVM and VCS) issues.
• Involved in LVMs and ZFS configuration.
• Involved in security hardening and capacity planning.
• Involved in Jumpstart and Kickstart installations.
• Involved in Puppet configuration.
• Worked closely with DBAs and Application specialists while configuring, administering and troubleshooting the issues related to Databases and various Applications.
• Involved in troubleshooting the issues with Veritas storage foundation 5.0, which includes Volume manager 5.0, VxFS5.0, etc and troubleshooting the issues.
• Involved in Packages and Patch Management.
• Involved in supporting Apache Web servers and troubleshooting the issues related to it.
• Performance Monitoring and Tuning on Servers using Performance Tools.
• Involved in Weblogic and Verisign SSL Cert installations and administration.
• Designing UNIX shell scripts (ksh, Bash and C shells) and Perl scripting for job scheduling and Administration.

Environment: RHEL 3/4/5/6,SUSE Linux 10/11/12, Sun Solaris 9/10/11, Cent OS, HP-UX 10/11,IBM AIX, Solaris LDOMs, Windows 2008, Oracle 9/10g,LVMs,ZFS, MySQL, Veritas Storage foundation 5.0(Volume Manager 5.0 and VXfs 5.0), VCS, Veritas Netbackup 5.1,Puppet,ESX 3/5,VMware,Single Point Cloud, AWS, Apache, Perl, Sun One, EMC Invista SAN, NetApp Filers, Dell Compellent SAN, M5000, Sun T4-1,Sun T5240/5120/T2000,HP DL580,Fujitsu,Dell DL580 Sun Fire 6900/6800, Sun Fire 15K,T5220,T2000,Sun X4100/X4500/X4540, Sun Fire V440/280R/v480/v210/v120,TapeDrives, E10K/ E6500, E6800, NFS, DNS, NIS, Cisco Routers 2560/801,catalyst switches, Brocade, Firewalls,F5 load balancers, TCP/IP, SMTP, SSH, SNMP, Shell Scripts (Bsh, Ksh & Csh), Awk, Sed, Perl and C.

Confidential, CA

UNIX System Admin/Web support engineer

• Involved in configuration and administration of RHEL and Sun Solaris Production and Staging Servers.
• Involved in upgrading production and staging servers from RHEL 4 to RHEL 5 and Sun Solaris 8/9 to Sun Solaris 10.
• Well experienced in supporting and troubleshooting the issues in High availability, Production Environment.
• Involved actively in 24/7 On-Call support for Online Web Applications and Web Servers.
• Involved in configuration of RHEL 3.0/4.0 Servers and troubleshooting the issues.
• Good experience in troubleshooting the Weblogic Applications issues and Web Servers.
• Involved in Backup systems such as Veritas Netbackup.
• Worked with DBA’s while troubleshooting the issues related to Oracle database Environments.
• Worked closely with DBAs and Application specialists while configuring, administering and troubleshooting the issues related to Databases and various Applications.
• Involved in troubleshooting the issues with Veritas storage foundation 5.0, which includes Volume manager 5.0, VxFS5.0, etc and troubleshooting the issues.
• Involved in Packages and Patch Management.
• Involved in supporting Apache Web servers and troubleshooting the issues related to it.
• Involved in supporting F5 load balancers,rewrite rules and proxypass constructs.
• Performance Monitoring and Tuning on Servers using Performance Tools.
• Involved in supporting F5 load balancers.
• Involved in Weblogic and Verisign SSL Cert installations and administration.
• Designing UNIX shell scripts (ksh, Bash and C shells) and Perl scripting for job scheduling and Administration.

Environment: RHEL 3.0/4.0/5.0 AS, Sun Solaris 8.0/9.0/10.0, Oracle 9/10g, MySQL, Veritas Storage foundation 5.0(Volume Manager 5.0 and VXfs 5.0), VCS, Veritas Netbackup 5.1,Weblogic Application Server,F5, ETL Informatica, Apache,htaccess, SunOne, Tomcat, HP storageworks SAN, ALOM, Sun Fire 6900/6800, Sun Fire 15K,T5220,T2000,Sun X4100/X4500/X4540, Sun Fire V440/280R/v480/v210/v120, Tape Drives, E10K/ E6500, E6800, NFS, DNS, NIS, Cisco Routers 2560/801,catalyst switches, Brocade, Firewalls, F5 load balancers, TCP/IP, SMTP, SSH, SNMP, Shell Scripts (Bsh, Ksh & Csh), Awk, Sed, Perl,Php and C.

Confidential,CA

Sr. UNIX System Admin

• Involved in configuration and administration of RHEL 3/5, Sun Solaris 9/10/11and HP-UX Production, development and testing Servers.
• Involved in upgrading production and development servers.
• Involved actively in 24/7 On-Call support for Online Web Applications and Web Servers.
• Involved in troubleshooting the issues related to HP-UX 10/11 and IBM AIX Servers also.
• Good experience in troubleshooting the Applications issues and Web Servers.
• Involved in Backup systems such as Veritas Netbackup.
• Worked with DBA’s while troubleshooting the issues related to Oracle database Environments.
• Worked closely with DBAs and Application specialists while configuring, administering and troubleshooting the issues related to Databases and various Applications.
• Involved in troubleshooting the issues with Veritas storage foundation 5.0, which includes Volume manager 5.0, VxFS5.0, etc and troubleshooting the issues.
• Involved in Packages and Patch Management.
• Involved in supporting Apache Web servers and troubleshooting the issues related to it.
• Performance Monitoring and Tuning on Servers using Performance Tools.
• Involved in Weblogic and Verisign SSL Cert installations and administration.
• Designing UNIX shell scripts (ksh, Bash and C shells) and Perl scripting for job scheduling and Administration.

Environment: RHEL 3/4/5, SUSE Linux 9/10, Sun Solaris 9/10/11HP-UX 10/11,IBM AIX, Windows 2008, Oracle 9/10g, MySQL, Veritas Storage foundation 5.0(Volume Manager 5.0 and VXfs 5.0), VCS, Veritas Netbackup 5.1,Apache, SunOne, LDAP, HP storageworks SAN, NetApp Filers, M5000,Dell DL580 Sun Fire 6900/6800, Sun Fire 15K,T5220,T2000,Sun X4100/X4500/X4540, Sun Fire V440/280R/v480/v210/v120, Tape Drives, E10K/ E6500, E6800, NFS, DNS, NIS, Cisco Routers 2560/801,catalyst switches, Brocade, Firewalls, TCP/IP, SMTP, SSH, SNMP, Shell Scripts (Bsh, Ksh & Csh), Awk, Sed, Perl and C.

Confidential, CA

UNIX System Admin/Web support engineer

• Involved in configuration and administration of Solaris 10/9 Production and Staging Servers.
• Involved in upgrading production and staging servers from Sun Solaris 8/9 to Sun Solaris 10.
• Well experienced in supporting and troubleshooting the issues in High availability, Production Environment.
• Involved actively in 24/7 On-Call support for Online Web Applications and Web Servers.
• Involved in configuration of RHEL 3.0 /4.0 Servers and troubleshooting the issues.
• Good experience in troubleshooting the Weblogic Applications issues and Web Servers.
• Involved in Backup systems such as Veritas Netbackup.
• Worked with DBA’s while troubleshooting the issues related to Oracle database Environments.
• Worked closely with DBAs and Application specialists while configuring, administering and troubleshooting the issues related to Databases and various Applications.
• Involved in troubleshooting the issues with Veritas storage foundation 5.0, which includes Volume manager 5.0, VxFS5.0, etc and troubleshooting the issues.
• Involved in Packages and Patch Management.
• Involved in supporting Apache Web servers and troubleshooting the issues related to it.
• Involved in supporting F5 load balancers, rewrite rules and proxypass constructs.
• Performance Monitoring and Tuning on Servers using Performance Tools.
• Involved in Weblogic and Verisign SSL Cert installations and administration.
• Designing UNIX shell scripts (ksh, Bash and C shells) and Perl scripting for job scheduling and Administration.

Environment: Sun Solaris 8.0/9.0/10.0, RHEL 3.0/4.0 S, Oracle 9/10g, MySQL, Veritas Storage foundation 5.0(Volume Manager 5.0 and VXfs 5.0), Veritas Netbackup 5.1,Weblogic Application Server, ETL Informatica, Apache, SunOne, Tomcat, LDAP, HP storageworks SAN, ALOM, Sun Fire 6900/6800, Sun Fire 15K,T5220,T2000,Sun X4100/X4500/X4540, Sun Fire V440/280R/v480/v210/v120, Tape Drives, E10K/ E6500, E6800, NFS, DNS, NIS, Cisco Routers 2560/801,catalyst switches, Brocade, Firewalls, TCP/IP, SMTP, SSH, SNMP, Shell Scripts (Bsh, Ksh & Csh), Awk, Sed, Perl and C.

Confidential, CA

UNIX System Admin/Production Support Engineer

• Involved in supporting and configuring Tomcat Application Servers and Apache Web Servers.
• Involved actively in 24/7 On-Call support for Cisco Networking Academy Application and Web Servers.
• Independently involved in configuration of RHEL 4.0/5.0 Servers and troubleshooting the issues.
• Actively involved in migration of Tomcat Application Servers and Apache Web Servers on RHEL Servers.
• Independently involved in administration and supporting BI Applications and Servers.
• Involved in supporting the applications on Oracle and MySQL database Environments.
• Configuration and administration of Big Brother Hobbit Monitoring Tool.
• Supported PHP based applications and troubleshooting the issues.
• Performance Monitoring and Tuning on Servers using Performance Tools.
• Involved in Apache Web Server SSL Cert installations and administration.
• Designing UNIX shell scripts (ksh, Bash and C shells) and Perl scripting for job scheduling and Administration.

Environment: RHEL 4.0/5.0 AS, Cent OS, Oracle 10g, MySQL, Tomcat Application Server, Apache Web Server, BI Applications, Big Brother Hobbit, PHP, Moodle, VMware, Veritas Backup Systems, HP and Dell Server hardware,RAID Arrays, Tape Drives, NFS, DNS, NIS, Cisco Router, Catalyst switches, Brocade, Firewalls, TCP/IP, SMTP, SSH, SNMP, Shell Scripts (Bsh, Ksh and Csh), Awk, Sed, Perl and C.

Confidential, CA

UNIX System Admin/Web support engineer

• Involved in configuration and administration of Solaris 10/9 Production and Staging Servers.
• Involved in upgrading production and staging servers from Sun Solaris 8/9 to Sun Solaris 10.
• Well experienced in supporting and troubleshooting the issues in High availability, Production Environment.
• Involved actively in 24/7 On-Call support for Online Web Applications and Web Servers.
• Involved in configuration of RHEL 3.0 /4.0 Servers and troubleshooting the issues.
• Good experience in troubleshooting the Weblogic Applications issues and Web Servers.
• Involved in Backup systems such as Veritas Netbackup.
• Worked with DBA’s while troubleshooting the issues related to Oracle database Environments.
• Worked closely with DBAs and Application specialists while configuring, administering and troubleshooting the issues related to Databases and various Applications.
• Involved in troubleshooting the issues with Veritas storage foundation 5.0, which includes Volume manager 5.0, VxFS5.0, etc and troubleshooting the issues.
• Involved in Packages and Patch Management.
• Involved in supporting Apache Web servers and troubleshooting the issues related to it.
• Performance Monitoring and Tuning on Servers using Performance Tools.
• Involved in Weblogic and Verisign SSL Cert installations and administration.
• Designing UNIX shell scripts (ksh, Bash and C shells) and Perl scripting for job scheduling and Administration.

Environment: Sun Solaris 8.0/9.0/10.0, RHEL 3.0/4.0 S, Oracle 9/10g, MySQL, Veritas Storage foundation 5.0(Volume Manager 5.0 and VXfs 5.0), Veritas Netbackup 5.1,Weblogic Application Server, ETL Informatica, Apache, SunOne, Tomcat, HP storageworks SAN, ALOM, Sun Fire 6900/6800, Sun Fire 15K,T5220,T2000,Sun X4100/X4500/X4540, Sun Fire V440/280R/v480/v210/v120, Tape Drives, E10K/ E6500, E6800, NFS, DNS, NIS, Cisco Routers 2560/801,catalyst switches, Brocade, Firewalls, TCP/IP, SMTP, SSH, SNMP, Shell Scripts (Bsh, Ksh & Csh), Awk, Sed, Perl and C.

Confidential, CA

Sr. UNIX System Admin

• Handled independently while upgrading production, development and QA servers from Sun Solaris 8 to Sun Solaris 9.
• Planning, Designing, Installation, configuration and administration of Sun Fire 6900 and Sun Fire 6800 Servers.
• Good experience in configuration and administration of Veritas storage foundation 5.0, which includes Volume manager 5.0, VxFS 5.0, etc and troubleshooting the issues.
• Involved in configuration of HBAs while accessing Hitachi SAN (AMS 1000, 9980 and 9570) and troubleshooting the issues.
• Involved in installation and configuration of RHEL 3.0 AS Servers for SOA environment.
• Installed and configured Sun Solaris 10 Server for tripwire server environment.
• Involved in configuring and supporting Apache and SunOne Web Servers.
• Installing Packages and Patch Management.
• Involved in supporting and configuring applications on Oracle, MySQL and Postgres database Environments.
• Performance Monitoring and Tuning on Servers using Performance Tools.
• Involved in setting up SLS encryption for Sales Audit Applications.
• Involved in designing UNIX shell scripts( ksh,Bash,Bsh and C shells) and Perl for job scheduling and Administration.
• Involved in installing and configuration of Enterprise Management software such as CA components (Unicenter Agent technologies, workload, data transfer tools and software delivery and Asset Management tools, etc).

Environment: Sun Solaris 8.0/9.0/10.0, RHEL 3.0 S, Oracle 9/10g,MySQL,Veritas Storage foundation 5.0(Volume Manager 5.0 & VXfs 5.0), Hitachi SAN( AMS 1000,9980 & 9570),Veritas Netbackup 5.1,SQL,Windows,ActiveDiretcory, Apache, SunOne, Shadow Image, PGP encryption,ALOM, LAN/WAN, Sun Fire 6900/6800, Sun Fire 15K,Sun X4100, Sun Fire V440/280R/v480/v210/v120, Tape Drives, E10K/ E6500, E6800, Ultra Enterprise 450, DHCP, NFS, DNS, NIS, Cisco Routers 2560/801,catalyst switches, Brocade, Firewalls,TCP/IP, SMTP, SSH, SNMP, Shell Scripts ( Bsh, Ksh & Csh ), Awk, Sed, Perl and C.

Confidential, OR

UNIX System Admin

• Installation, configuration and administration of Sun Solaris 8/10 Production Servers.
• Involved in migration and consolidation of Unix Servers in Production data center.
• Involved in configuring, administration and troubleshooting Unix Servers which are connected to Hitachi SAN (Tagmastore USP) and EMC Symmetrix SAN.
• Good experience in Veritas products such as Volume manager and Veritas Clustering (VCS).
• Installation of Packages, Patch Management and Upgrades.
• File system management, disk space and user management on various servers running under Solaris.
• Performance monitoring and tuning on servers.
• Involved in designing UNIX shell scripts ( ksh,Bash,Bsh and C shells) for job scheduling and Administration.
• Involved in installation and configuration of SCSI & PCI HBAs and troubleshooting the issues while connected to SAN.
• Involved in troubleshooting the hardware related issues in production servers.

Environment: Sun Solaris 8.0/10.0, Win2000, Oracle 9/ 10g,Humming Bird Exceed on Demand, Veritas volume manager and VCS, Hitachi SAN, EMC Symmetrix SAN, SSH, RSC, ALOM, RAID, Apache, LAN/WAN, Sun Fire V440/280R/v480/v120, Tape Drives, E10K/ E6500, E6800, Ultra Enterprise 450, DHCP, NFS, DNS, NIS, Cyclades, Cisco IOS, Cisco Routers 2560/801,catalyst switches, Firewalls, TCP/IP, SMTP, SSH, SNMP, Shell Scripts ( Bsh, Ksh & Csh ), Awk, Sed, Perl & C.