Freelancer profile translated to English.

Description

Linux System Administrator - Server Outsourcing

Hello,

Linux systems and networks administrator for almost 10 years now, I can intervene occasionally on your information systems if you encounter malfunctions or need to evolve your platform, or work in partnership with you on the long term in outsourcing.

I intervene in system administration on various hosts such as OVH or directly on servers installed in data centers.

Technical skills:

- OVH, datacenter, outsourcing,

- OS: mainly Debian, Ubuntu, Centos and Redhat Linux server;

- Databases: mysql, mariadb;

- Web server: apache, nginx;

- Monitoring: Centreon, zabbix,;

- Source code management: git;

- Automated deployment: chef, Ansible, shell script, docker;

- Load balancing: haproxy,

- Mail server: postfix, dkim, spf;

- Virtualization: vsphere OVH, Wmware Esx, Xen Orchestra XCP-ng/XenServer

See you soon,

Chikhaoui Hamza

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

RTE
Linux /Windows System Engineer
ENERGY AND UTILITIES
May 2022 - Today (4 years and 1 month)
Montigny-le-Bretonneux, France
• Installation, configuration, and Operational Maintenance of the infrastructure:
o Storage (hardware RAID, disk arrays, LVM…)
o VMware ESX cluster administration
o Upgrade of servers from Debian 10 to Debian 11
o Automation of tasks and post-installation (shell scripting, vSphere-CLI)
• Installation, setup, administration, and tuning of OS and server hardware in data centers (Build and Run)
• Prepare application or infrastructure version upgrades, and the procedures and instructions necessary for real-time activity (APACHE / TOMCAT)
• Configuration and administration of storage/backup solutions
• Centralized monitoring of all infrastructure and applications:
o Incident management under SCOM, GSX for Windows Servers, Exchange.

o Incident management under Zabbix and Centreon for the application and industrial part
Netcom Services
Linux System Engineer
TELECOMMUNICATIONS
August 2018 - April 2022 (3 years and 8 months)
Paris, France
Implementation of PKI infrastructure (electronic signature)
• Migration of the push mail infrastructure and Dockerization of mail-related applications - marketing on Kubernetes
• Implementation of a monitoring cluster for network equipment and servers under Zabbix on CentOS 8
• Management of MIBs and OIDs
• Writing technical procedures for the operations team
• Weekly meetings with other IT department teams
Implementation of an open-source proxy solution under Squid
• Migration of the infrastructure from VMware vSphere ESX to the open-source XCP-ng project
• Implementation of the mail server under Postfix/devcote
• Installation of a deployment solution under SCCM: Windows Server 2016 and SQL Server
Support & Maintenance in Operational Condition (MCO)
• Processing of alerts from N2 and N3 supervision tools (Incident, Problem, Change Management)
• Upgrade of servers from Debian 10 to Debian 11
• Development of Python scripts and implementations on the Zabbix API
• Consideration of feedback/queries and establishment of the action plan
• Management of Linux servers in a Virtual Server XCP-ng environment
• User management (Linux – Windows) NTP, DNS, DHCP, crontab, Mail Server (sendmail/postfix)
• Installation of an ad blocker under Pi-Hole
• Management and Administration of ESET Protect antivirus
IT Asset Management
• User account management on Active Directory (AD) and access rights
• Implementation of GPOs
• Installation and configuration of network equipment and servers (switches, routers, VM servers, access points)
SFR
Network Administrator
TELECOMMUNICATIONS
July 2015 - August 2018 (3 years and 1 month)
Tunis, Tunisia
Configuration of client ADSL routers, 4G keys (Cisco, Microtik)
• Perform diagnostics with users and handle requests related to various malfunctions
• Management of client IP telephony
• Manage technical requests related to clients (email, port opening /VPN/MPLS/DMZ…)
• Level 1/2 support and incident resolution
• Intervention on client equipment (connection and management) in coordination with their IT providers during network setup