Red Hat Linux Reference Guide

Linux Introduction

What is Linux Linux Architecture Filesystem & Directory Structure

VI-EDITOR

Operation Modes VI-Editor Commands

Process Management

What is Linux Process? Linux Process Management

Linux Installation

Linux Installation - Physical Servers

Disk Partitions & File System Management

Disk Partitions File Systems

Logical Volume Management - LVM

What is LVM? LVM Commands & Scenarios

User & Group Administration

What is User & Group? Managing Users and Groups

Package Management

Package Management using RPM Package Management using YUM

Network File System - NFS

What is NFS? NFS Server & Client Configuration

Domain Naming System - DNS

What is DNS? DNS Architecture Configure DNS Server Configure DNS Client DNS Summary

Apache HTTP Web Server

What is HTTP Web Server? HTTP Web Server Architecture Configure Apache HTTP Web Server

KickStart Installations

What is KickStart? Configure KickStart Server

FTP server

What is FTP Server? FTP Architecture Configure FTP Server Configure FTP Client FTP Summary

BOOT PROCESS

What is Boot Process? Boot Process Stages

Dynamic Host Configuration Protocol - DHCP

What is DHCP? DHCP Architecture Configure DHCP Server

Job Scheduling

Cron Jobs Management Cron Job Summary

File Links

Soft Link vs Hard Link

Swap Management

What is Swap?

Log Management

Log Rotate rsyslog

Performance Management

How to Monitor Performance? Performance Tools

Linux Troubleshooting

SingleUserMode vs RescueMode vs EmergencyMode Configure Kdump

Linux Summary

Linux Configuration Files Linux Interview Questions

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FTP Architecture

FTP Client 

  • System which is  initiating the connection is called as Client.

FTP Server 

  • System which is  establishing the connection is called as Server.

Steps: 

  1. Client system initiate the connection to the server.
  2. Server will  validate the credentials supplied by the client and establish the connection
  3. Once connection is  established then files can be transfer between the systems. 
    • client can send/receive files
    • Server can send/receive files
  4. Port 21 is used to  establish the connection and FTP  command operations
  5. Port 20  is  used for data transfer between the systems.

FTP Configurations: 

  • Use : Ftp is used for uploading and downloading the files.
  • Disadvantage : Directory cannot be uploaded or downloaded.
  • Package : vsftpd
  • Daemon : vsftpd (Very Secure Ftp daemon)
  • Script : /etc/initd/vsftpd
  • Port no : 21 (Tcp) > 1024 (Udp, Random)
  • Configuration files :
    • /etc/vsftpd/vsftpd.conf
    • /etc/vsftpd/user_list
    • /etc/vsftpd/ftpuser
    • /etc/pam.d/vsftpd
  • Document Root : /var/ftp
  • Home directory : /var/ftp (which is created only when the package is installed.

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