Linux Administration

OVERVIEW OF LINUX ADMINISTRATION

Linux Administration refers to the process of managing and maintaining Linux-based systems, including servers, desktops, and embedded systems. It involves a wide range of tasks aimed at ensuring that the system is running efficiently, securely, and reliably.

🛠️ Key Responsibilities:

  1. User & Permission Management

    • Create, delete, and manage users and groups.

    • Assign appropriate file and directory permissions.

  2. System Monitoring & Performance Tuning

    • Monitor CPU, memory, disk usage, and logs.

    • Identify and resolve performance bottlenecks.

  3. Package & Software Management

    • Install, update, and remove software using tools like yum, apt, or dnf.

  4. Service & Process Management

    • Start, stop, and manage services using systemd or older tools like init.

    • Monitor running processes and troubleshoot crashes or high resource usage.

  5. Disk & Filesystem Management

    • Partition disks, format with file systems (e.g., ext4, xfs), and mount/unmount volumes.

    • Manage disk quotas and monitor usage.

  6. Networking Configuration

    • Configure IP addresses, DNS, routing, firewalls (iptables/nftables), and troubleshoot connectivity issues.

  7. Security Hardening

    • Configure firewalls, SELinux/AppArmor, and SSH.

    • Apply security patches and monitor for vulnerabilities.

  8. Backup & Recovery

    • Schedule regular backups and ensure reliable recovery procedures.

    • Use tools like rsync, tar, or backup suites like Bacula or Amanda.

  9. Automation & Scripting

    • Automate repetitive tasks using shell scripts or configuration tools (e.g., Ansible, Puppet).

  10. System Updates & Patch Management

    • Regularly update the system for security and performance using yum, dnf, or apt.

📍 Where It’s Used:

Linux Administration is critical in:

  • Web and application servers

  • Database servers

  • Cloud infrastructure (AWS, Azure, GCP)

  • DevOps pipelines

  • Embedded systems (IoT, routers, etc.)

Linux Administration –> Duration: 45 Days

Fees: 5,000/-

Shell Scripting:  –> Duration 1 Month

Fees: 5000/-

Pre-Requisite: Linux Basics (1 Week)

Linux Administration Course Contents

Essentials

  • Overview of  UNIX
  • History of Linux
  • Linux architecture
  • Kernel
  • Shell

Linux Basics 

  • Displaying System date and time :date
  • Displaying present and working users : who and whoami
  • Calculator : bc
  • Machine characteristics : uname
  • Knowing a terminal : tty
  • Displaying a calendar : cal
  • Displaying a Message : echo and print
  • Linux file Hierarchy concepts
  • Listing files and directories : ls
  • More and less commands
  • The seven fundamental file types
  • Creating and viewing the files :  cat
  • Creating, Modifying, changing and removing directories : mkdir, cd, rmdir
  • Moving and Renaming files : mv
  • Copying files : cp command with attributes
  • Deleting a File : rm command with attributes
  • Links: hard Link and Soft Link
  • Absolute path name
  • Relative path name

Compressions

  • Zip
  • Compress
  • Gzip
  • Bzip2

File Attributes

  • Chmod
  • Chown

Filter commands

  • Which, Whereis, locate whatis
  • Find command with attributes

String Processing

  • Head, Tail
  • wc,
  • grep

Vi Editor

  • Overview of vi editor
  • Three modes of vi editor
  • Saving and Quitting
  • Navigation
  • Editing a Text
  • Undoing changes
  • Yank and Paste
  • Changing and Deleting
  •  

System Administration

Disk Partitioning and Mounting

  • Creating partitions by using “fdisk”
  • Formatting the file systems “mkfs, mkfs.ext2, mkfs.ext3, mkfs.ext4, mkfs.xfs”
  • Mounting and unmounting the file systems
  • Troubleshooting the file systems issues

 Users and Groups Administration

  • Creating and deleting users
  • Modifying Users profile
  • Creating and deleting Groups
  • Adding users into group
  • Monitoring the users
  • Creation of sudo users
  • Creation of Disk Quotas
  • Troubleshooting user related issues

Run Levels

  • Understanding different types of Run Levels
  • Understanding different type os shutdown commands

System Booting Process

Resource Package Management (RPM)

  • Querying , Installing, Updating and Removing packages by using “RPM”
  • Managing software packages by using “YUM” (Yellowdog Update Manager)

LVM

  • Creation of LVM partitions
  • Resizing the LVM partitions

RAID (Redundant Array of Inexpensive or Independent disks)

  • Understanding different Types of RAID
  • RAID Configuration

Backup & Restore

  • Basics of Backup and Restore
  • Backup of Restore using tar command
  • Understanding zip, gzip, unzip, bzip, bunzip

Automation  of Jobs

  • Understanding at jobs and Cron Jobs  

Network Administration

  • Networking
  • Configuring network card with IP address
  • Creating the logical IP Address
  • Adding, removing and Changing  the IP address

FTP Service

  • Configuring VSFTPD Service
  • Uploading and Downloading files by using different FTP client

NFS (Network File System)

  • Configuration of NFS Server
  • Configuration of NFS Client

DNS (Domain Naming Service)

  • Understanding DNS
  • Configuration of DNS Server
  • Configuration of  DNS client

DHCP (Dynamic Host Configuration Protocol)

  • Understanding DHCP Server
  • Configuration of DHCP Server

TELNET, SSH, SCP

  • Concept and Configuration of telnet server and telnet clients
  • Understanding SSH and SCP concept and configuration

Network Installation

  • Installation through FTP/NFS servers

APACHE (Web Server)

  • Understanding the concept of Web Server
  • Configuration of Web Server
  • Configuration of Virtual Hosting

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Linux Admin Certification Course at Learn Tech Masters

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