Create & Maintain User and Group AdministrationCreating, modifying users, changing permissions, setting sticky bit and ownership of files and directory.Installed and configured Logical Volume Manager – LVM and RAID.Installed, upgraded and managed the packages via RPM and YUM package management.Managed systems routine backup, scheduling jobs, enabling cron jobs, enabling system logging and network logging of servers for maintenance.Knowledge on configuring Se Linux.Configure security settings using Iptables, Firewalls.Knowledge on configuring Dynamic Host Configuration Protocol(DHCP) in local LAN.Configure FTP server.Configure Apache web Server.Configuration and maintain Syslog Server.Create,mount, unmount and use ext4 & XFS filesystems.Configure NFS forsharing files b/w Linux OS’s.Configure samba server for sharing files & directories across different OS’s.Installation & Configuration of MariaDB database by setting a password for super user & database user.Monitoring the system performance.Perform User Account and Group and Security Administration.Responsible for Package and Patch Management &Installation.Managing crash dumps & core files.Scheduling jobs using CRONTAB & AT utility.Implementing file permissions for the users & groups.Network File System (NFS) and Network Information Services (NIS) and Administration.Performing system boot and shutdown procedures.Providing Technical support: Analyzing/Troubleshooting/Addressing Technical Issues related to servers.Skilled in designing backup strategy & ensuring scheduled/unscheduled as per the back plan.Possess sound understanding/Installing/Updating of software like RHEL6 & RHEL7.Installing the Systems over the network using JumpStart and Standalone with CDROM.Install and configure the server as per Company release notes or requirements.Perform a trend Analysis of CPU/Memory/Disk Utilization for criticalperforms/Servers.Service Management- NFS/NIS/SSH/TELNET/FTP.Responsible for Vender Man