System Admin Course

Introduction of Linux, Basic Networking Concepts, About Proprietary and Open Source Software, Duties of system administrator and Linux engineer. VI and VIM editor, Installation of VirtualBox Vmware and Oracle Virtual Machine, Installation of Linux Minimal and Graphic User Interface (GUI).

Linux Directory Structure, Define Structure of Directory and There Uses, About Root User and Normal User, Remote Connectivity using Putty, Kitty, Mobaxterm, VNC, RDP. CLI and The Shell, create and edit text File and Directory.

What is Boot Process? Linux Boot Process Involves Several Stages, BIOS/UEFI Initialization, Followed by Grub Boot Loader, Kernal Loading and INIT System(Systemd), Systemctl Domain, INIT targets, Service Management, Booting in Rescue Mode, Single User Mode, Recover Root Password, Setup Grub Password.

Introduction of Mounting Linux Filesystems and Mount Points ( ext2, ext3, ext4, xfs …), Disk Partitioning, Formatting the Harddisk, Mounting Filesystem ,Persistent vs Mount Points /etc/fstab, Journaling Attributes, Auto and Manual Mounting File System, File and Disk Management Tools, Mount Binding, The lost+found Directory.

Networking service overview, concept of IP, Subnet mask, Gateway and DNS , IP configuration, Multiple IP, range of IP, MAC address, network configuration file locations and format, routing table, Linux as a router, Network manager, Networking tools, Link status and other related commands.

System vs Application Users, Linux User Essential, User Management /etc/passwd, /etc/shadow, Group Management /etc/group, /etc/gshadow, Creating, Modifying, and Deleting Users (useradd, passwd,usermod, chage, userdel), User Roles Default Parameters, Ownership (chown), Working with Groups, Setting User Environment, Login Configuration Files, Password Essential, Related Security, /etc/skel, /etc/nologin, Superuser Equivalent.

Linux Permissions/Ownership: User(u), Group(g), Others(o), Viewing Permissions, Traditional and Octal method(chmod), Setting default Permission ( UMASK), Special Permission ( SUID,SGID,Sticky bit),Sudoers, File and Folder Attributes, ACLs (FACL and GETFACL),Soft and Hard Links, Inode Concepts.

Why Scheduling is Important in an Oracle Environment, Types of Scheduling Tools in Linux, Manual vs. Automated Job Execution, One Time Automation (AT), Repetitive Automation (cron), Anacron, Various examples, Maintenance Scheduling Backup, Restore and Monitoring Jobs, Scheduling Security, Scripting in Cron at Reboot, Once in week/month, Overview of Cron and the Cron Daemon (crond).

Basic Commands, Advance Commands, Linux Monitoring Commands, Linux Important Commands, rpm/Yum/dnf Server, Monitoring Running Process(PID), Terminate Running Processes with Kill, Systemd, Package Managers, Monitoring Running System with Top Command.