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Lesson 1

Red Hat Linux System Administration

In this course, you will discover the power of Linux on the internet and integrate Linux with other networks and operating systems.
Linux is a Unix-like and mostly POSIX-compliant computer operating system assembled under the model of free and open-source software development and distribution. The defining component of Linux is the Linux kernel, an operating system kernel first released on 5 October 1991 by Linus Torvalds. Linux was originally developed as a free operating system for Intel x86-based personal computers. It is a leading operating system on servers and other big systems such as mainframe computers. Linux also runs on embedded systems, which are devices whose operating system is typically built into the firmware and is highly tailored to the system. This includes
  1. mobile phones,
  2. tablet computers,
  3. network routers,
  4. facility automation controls,
  5. and video game consoles.
Android is built on top of the Linux kernel.

Integrating Red Hat Linux with Other Networks and Operating Systems

Question: How do I use Red Hat Linux to integrate with other networks and operating systems?
Red Hat Linux, a popular enterprise Linux distribution, can be integrated with various networks and operating systems using different tools and protocols. This guide will discuss some common methods for integrating Red Hat Linux with other systems, including Windows, macOS, and UNIX-based systems.

1. Network File System (NFS)

NFS is a distributed file system protocol that allows a system to share directories and files with others over a network. By configuring NFS, you can enable file sharing between Red Hat Linux and other UNIX-based operating systems. To set up NFS on Red Hat Linux, follow these steps:
  1. Install the required NFS packages:
    sudo yum install -y nfs-utils
  2. Configure the NFS exports by editing the /etc/exports file and adding your shared directories:
    /shared_directory client_hostname(options)
  3. Enable and start the NFS services:
    sudo systemctl enable nfs-server
    sudo systemctl start nfs-server
  4. Configure the client systems to mount the NFS shared directories.

2. Samba

Samba is an open-source implementation of the Server Message Block (SMB) protocol, which allows for file and printer sharing between Windows, macOS, and Linux systems. Setting up a Samba server on your Red Hat Linux system will enable cross-platform file sharing.
To set up Samba on Red Hat Linux, follow these steps:
  1. Install the required Samba packages:
    sudo yum install -y samba samba-client
  2. Create a shared directory and set its permissions:
    sudo mkdir /shared_directory
    sudo chown -R nobody:nobody /shared_directory
    sudo chmod -R 0755 /shared_directory
  3. Configure the Samba server by editing the /etc/samba/smb.conf file and adding your shared directories:
       path = /shared_directory
       browseable = yes
       read only = no
       valid users = @smbgrp
  4. Create a Samba group and add users to it:
    sudo groupadd smbgrp
    sudo usermod -aG smbgrp username
  5. Set Samba passwords for the users:
    sudo smbpasswd -a username
  6. Enable and start the Samba services:
    sudo systemctl enable smb
    sudo systemctl start smb
  7. Configure client systems to access the Samba shares.

3. OpenLDAP

OpenLDAP is an open-source implementation of the Lightweight Directory Access Protocol (LDAP). It can be used to manage authentication and authorization across different operating systems and platforms.
To set up OpenLDAP on Red Hat Linux, follow these steps:
  1. Install the required OpenLDAP packages:
    sudo yum install -y openldap openldap-servers openldap-clients
  2. Configure the OpenLDAP server by editing the /etc/openldap/slapd.conf file.
  3. Start and enable the OpenLDAP service:
    sudo systemctl enable slapd
    sudo systemctl start slapd

  4. Configure client systems to use the OpenLDAP server for authentication and authorization.

These are just a few methods to integrate Red Hat Linux with other networks and operating systems. Depending on your specific requirements, you may need to use additional tools and protocols to achieve seamless integration. Always follow best practices and thoroughly test your configurations in a non-production environment before deploying them in a live setting.

Red Hat Reference

Computer Security

Computer security is a branch of computer technology known as information security as applied to computers and networks.The objective of computer security includes protection of information and property from theft, corruption while allowing the information and property to remain accessible and productive to its intended users.
The term computer system security means the collective processes and mechanisms by which sensitive and valuable information and services are protected from publication, tampering or collapse by unauthorized activities or untrustworthy individuals and unplanned events respectively.
The strategies and methodologies of computer security often differ from most other computer technologies because of it combines various elements from different computer fields.
The goal of computer security is preventing unwanted computer behavior instead of enabling wanted computer behavior.

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