Linux: Powerful Server Administration电子书

Linux: Powerful Server Administration

Table of Contents

Linux: Powerful Server Administration

Linux: Powerful Server Administration

Credits

Preface

What this learning path covers

What you need for this learning path

Who this learning path is for

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Module 1

1. Managing Users and Groups

Introduction

Creating a user account

Getting ready

How to do it…

How it works…

There's more…

See also

Creating user accounts in batch mode

Getting ready

How to do it...

How it works…

Creating a group

Getting ready

How to do it...

How it works…

There's more…

See also

Adding group members

Getting ready

How to do it…

How it works…

There's more…

Deleting a user account

Getting ready

How to do it...

How it works…

There's more…

See also

Managing file permissions

Getting ready

How to do it…

How it works…

There's more…

Getting root privileges with sudo

Getting ready

How to do it...

How it works…

There's more…

Setting password less sudo

Other uses of sudo

See also

Setting resource limits with limits.conf

Getting ready

How to do it...

How it works…

There's more…

Setting up public key authentication

Getting ready

How to do it...

How it works…

Working of SSH authentication

There's more…

Troubleshooting SSH connections

SSH tools for the Windows platform

See also

Securing user accounts

How to do it...

How it works…

2. Networking

Introduction

Connecting to a network with a static IP

Getting ready

How to do it…

How it works…

There's more…

IPv6 configuration

See also

Installing the DHCP server

Getting ready

How to do it…

How it works…

There's more…

Installing the DNS server

Getting ready

How to do it…

How it works…

See also

Hiding behind the proxy with squid

Getting ready

How to do it…

How it works…

There's more…

Access control list

Set cache refresh rules

Sarg – tool to analyze squid logs

Squid guard

See also

Being on time with NTP

How to do it…

How it works…

There's more…

See also

Discussing load balancing with HAProxy

Getting ready

How to do it…

How it works…

There's more …

See also

Tuning the TCP stack

Getting ready…

How to do it…

How it works…

See also

Troubleshooting network connectivity

Getting ready

How to do it…

There's more…

Securing remote access with OpenVPN

Getting ready…

How to do it…

How it works…

There's more…

Securing a network with uncomplicated firewall

Getting ready

How to do it…

There's more…

See also

Securing against brute force attacks

Getting ready

How to do it…

How it works…

There's more…

Discussing Ubuntu security best practices

Getting ready

How to do it…

How it works…

See also

3. Working with Web Servers

Introduction

Installing and configuring the Apache web server

Getting ready

How to do it…

How it works…

There's more…

HTTP version 2 support

See also

Serving dynamic contents with PHP

Getting ready

How to do it…

How it works…

PHP settings

There's more…

Installing the LAMP stack

Upgrading PHP under Ubuntu 14

Hosting multiple websites with a virtual domain

Getting ready

How to do it…

How it works…

See also

Securing web traffic with HTTPS

Getting ready

How to do it…

How it works…

There's more…

See also

Installing Nginx with PHP_FPM

Getting ready

How to do it…

How it works…

There's more…

See also

Setting Nginx as a reverse proxy

Getting ready

How to do it…

How it works…

There's more…

HAProxy and Varnish

See also

Load balancing with Nginx

Getting ready

How to do it…

How it works…

There's more…

See also

Setting HTTPs on Nginx

Getting ready

How to do it…

How it works…

See also

Benchmarking and performance tuning of Apache

Getting ready

How to do it…

There's more…

See also

Securing the web server

Getting ready

How to do it…

How it works…

See also

Troubleshooting the web server

Getting ready

How to do it…

Web server not accessible

Virtual host not accessible

Access denied or forbidden errors

Apache downloads .php files

4. Working with Mail Servers

Introduction

Sending e-mails with Postfix

Getting ready

How to do it…

How it works…

See also

Enabling IMAP and POP3 with Dovecot

Getting ready

How to do it…

How it works…

See also

Adding e-mail accounts

Getting ready

How to do it…

How it works…

There's more…

Web console for virtual mailbox administration

See also

Mail filtering with spam-assassin

Getting ready

How to do it…

How it works…

There's more…

See also

Troubleshooting the mail server

Getting ready

How to do it…

See also

Installing the Zimbra mail server

Getting ready

How to do it…

How it works…

There's more…

See also

5. Handling Databases

Introduction

Installing relational databases with MySQL

Getting ready

How to do it…

How it works…

There’s more…

Securing MySQL installation

See also

Storing and retrieving data with MySQL

Getting ready

How to do it…

How it works…

Importing and exporting bulk data

How to do it…

See also

Adding users and assigning access rights

Getting ready

How to do it…

How it works…

There’s more…

Removing user accounts

Setting resource limits

See also

Installing web access for MySQL

Getting ready

How to do it…

How it works…

There’s more…

See also

Setting backups

Getting ready

How to do it…

How it works…

See also

Optimizing MySQL performance – queries

Getting ready

How to do it…

How it works…

There’s more…

Sharding MySQL

See also

Optimizing MySQL performance – configuration

Getting ready

How to do it…

How it works…

There’s more…

Percona configuration wizard

MySQL table compression

See also

Creating MySQL replicas for scaling and high availability

Getting ready

How to do it…

How it works…

There’s more…

See also

Troubleshooting MySQL

Getting ready

How to do it…

See also

Installing MongoDB

Getting ready

How to do it…

How it works…

See also

Storing and retrieving data with MongoDB

Getting ready

How to do it…

How it works…

There’s more…

See also

6. Network Storage

Introduction

Installing the Samba server

Getting ready

How to do it…

How it works…

There's more…

Tools for personal file sharing

See also

Adding users to the Samba server

Getting ready

How to do it…

How it works…

There's more…

See also

Installing the secure FTP server

Getting ready

How to do it…

How it works…

There's more…

See also

Synchronizing files with Rsync

How to do it…

How it works…

There's more…

See also

Performance tuning the Samba server

Getting ready

How to do it…

How it works…

Troubleshooting the Samba server

How to do it…

Checking network connectivity

Checking the Samba service

Checking Samba logs

Checking Samba configuration

See also

Installing the Network File System

Getting ready

How to do it…

How it works…

There's more…

See also

7. Cloud Computing

Introduction

Creating virtual machine with KVM

Getting ready

How to do it…

How it works…

There's more…

See also

Managing virtual machines with virsh

Getting ready

How to do it…

How it works…

There's more…

Easy cloud images with uvtool

See also

Setting up your own cloud with OpenStack

Getting ready

How to do it…

How it works…

There's more…

See also

Adding a cloud image to OpenStack

Getting ready

How to do it…

How it works…

There's more…

See also

Launching a virtual instance with OpenStack

Getting ready

How to do it…

How it works…

There's more…

See also

Installing Juju a service orchestration framework

Getting ready

How to do it…

How it works…

There's more…

See also

Managing services with Juju

Getting ready

How to do it…

How it works…

There's more…

See also

8. Working with Containers

Introduction

Installing LXD, the Linux container daemon

Getting ready

How to do it…

How it works…

There's more…

See also

Deploying your first container with LXD

Getting ready

How to do it…

How it works…

There's more…

See also

Managing LXD containers

Getting ready…

How to do it…

There's more…

See also

Managing LXD containers – advanced options

How to do it…

How it works…

Setting resource limits on LXD containers

How to do it…

How it works…

There's more…

See also

Networking with LXD

Getting ready

How to do it…

How it works…

There's more…

See also

Installing Docker

Getting ready

How to do it…

How it works…

There's more…

See also

Starting and managing Docker containers

Getting ready

How to do it…

How it works…

There's more…

See also

Creating images with a Dockerfile

Getting ready

How to do it…

How it works…

There's more…

See also

Understanding Docker volumes

Getting ready

How to do it…

How it works…

See also

Deploying WordPress using a Docker network

How to do it…

How it works…

There's more…

See also

Monitoring Docker containers

How to do it…

How it works…

There's more…

See also

Securing Docker containers

How to do it…

See also

9. Streaming with Ampache

Introduction

Installing the Ampache server

Getting ready

How to do it…

How it works…

There's more…

See also

Uploading contents and creating catalogs

Getting ready

How to do it…

How it works…

Setting on-the-fly transcoding

Getting ready

How to do it…

Enabling API access for remote streaming

Getting ready

How to do it…

How it works…

Streaming music with Ampache

Getting ready

How to do it…

10. Communication Server with XMPP

Introduction

Installing Ejabberd

Getting ready

How to do it…

How it works…

See also

Creating users and connecting with the XMPP client

Getting ready

How to do it…

How it works…

There's more…

See also

Configuring the Ejabberd installation

Getting ready

How to do it…

How it works…

There's more…

See also

Creating web client with Strophe.js

Getting ready

How to do it…

How it works…

There's more…

See also

Enabling group chat

Getting ready

How to do it…

How it works…

There's more…

See also

Chat server with Node.js

Getting ready

How to do it…

How it works…

There's more…

See also

11. Git Hosting

Introduction

Installing Git

Getting ready

How to do it…

How it works…

There's more…

See also

Creating a local repository with Git CLI

Getting ready

How to do it…

How it works…

There's more…

See also

Storing file revisions with Git commit

Getting ready

How to do it…

How it works…

There's more…

Synchronizing the repository with a remote server

Getting ready

How to do it…

How it works…

There's more…

GitHub pages

See also

Receiving updates with Git pull

Getting ready

How to do it…

How it works…

See also

Creating repository clones

Getting ready

How to do it…

How it works…

See also

Installing GitLab, your own Git hosting

Getting ready

How to do it…

How it works…

There's more…

See also

Adding users to the GitLab server

Getting ready

How to do it…

Creating a repository with GitLab

Getting ready

How to do it…

Automating common tasks with Git hooks

Getting ready

How to do it…

How it works…

See also

12. Collaboration Tools

Introduction

Installing the VNC server

Getting ready

How to do it…

How it works…

See also

Installing Hackpad, a collaborative document editor

Getting ready

How to do it…

How it works…

There's more

Using Hackpad with Docker

See also

Installing Mattermost – a self-hosted slack alternative

Getting ready

How to do it…

How it works…

There's more …

See also

Installing OwnCloud, self-hosted cloud storage

Getting ready

How to do it…

How it works…

See also

13. Performance Monitoring

Introduction

Monitoring the CPU

Getting ready

How to do it…

How it works…

There's more…

See also

Monitoring memory and swap

Getting ready

How to do it…

How it works…

There's more…

See also

Monitoring the network

Getting ready

How to do it…

How it works…

There's more…

Monitoring storage

Getting ready

How to do it…

Setting performance benchmarks

Getting ready

How to do it…

There's more…

Graphing tools

More options

See also

14. Centralized Authentication Service

Introduction

Installing OpenLDAP

Getting ready

How to do it…

How it works…

See also

Installing phpLDAPadmin

Getting ready

How to do it…

How it works…

There's more…

See also

Ubuntu server logins with LDAP

Getting ready

How to do it…

How it works…

See also

Authenticating Ejabberd users with LDAP

Getting ready

How to do it…

How it works…

See also

2. Module 2

1. Installing CentOS

Introduction

Downloading CentOS and confirming the checksum on Windows or OS X

Getting ready

How to do it...

How it works…

Creating USB installation media on Windows or OS X

Getting ready

How to do it...

How it works...

Performing an installation of CentOS using the graphical installer

Getting ready

How to do it...

How it works…

Running a netinstall over HTTP

Getting ready

How to do it...

How it works...

Installing CentOS 7 using a kickstart file

Getting ready

How to do it...

How it works...

Getting started and customising the boot loader

Getting ready

How to do it...

How it works...

Troubleshooting the system in rescue mode

Getting ready

How to do it...

Reaching rescue mode

Accessing the filesystem

Accessing the filesystem

Re-install the CentOS boot loader

How it works...

Updating the installation and enhancing the minimal install with additional administration and development tools

Getting ready

How to do it...

How it works...

2. Configuring the System

Introduction

Navigating text files with less

Getting ready

How to do it...

How it works...

Introduction to Vim

Getting ready

How to do it...

How it works...

Speaking the right language

Getting ready

How to do it...

How it works...

There's more…

Synchronizing the system clock with NTP and the chrony suite

Getting ready

How to do it...

How it works...

There's more...

Setting your hostname and resolving the network

Getting ready

How to do it...

How it works...

There's more...

Building a static network connection

Getting ready

How to do it...

How it works...

Becoming a superuser

Getting ready

How to do it...

How it works...

Customizing your system banners and messages

Getting ready

How to do it...

How it works...

There's more...

Priming the kernel

Getting ready

How to do it...

How it works...

There's more...

3. Managing the System

Introduction

Knowing and managing your background services

Getting ready

How to do it...

How it works...

There's more...

Troubleshooting background services

Getting ready

How to do it...

How it works...

Tracking system resources with journald

Getting ready

How to do it...

How it works...

Configuring journald to make it persistent

Getting ready

How to do it...

How it works...

Managing users and their groups

Getting ready

How to do it...

How it works...

Scheduling tasks with cron

Getting ready

How to do it...

How it works...

There's more...

Synchronizing files and doing more with rsync

Getting ready

How to do it...

How it works...

Maintaining backups and taking snapshots

Getting ready

How to do it...

How it works...

Monitoring important server infrastructure

Getting ready

How to do it...

How it works...

Taking control with GIT and Subversion

Getting ready

How to do it...

How it works

There's more...

4. Managing Packages with YUM

Introduction

Using YUM to update the system

Getting ready

How to do it...

How it works...

There's more...

Using YUM to search for packages

Getting ready

How to do it...

How it works...

There's more...

Using YUM to install packages

Getting ready

How to do it...

How it works...

There's more...

Using YUM to remove packages

Getting ready

How to do it...

How it works...

Keeping YUM clean and tidy

Getting ready

How to do it...

How it works...

There's more...

Knowing your priorities

Getting ready

How to do it...

How it works...

Using a third-party repository

Getting ready

How to do it...

How it works...

There's more...

Creating a YUM repository

Getting ready

How to do it...

How it works...

There's more...

Working with the RPM package manager

Getting ready

How to do it...

How it works...

There's more...

5. Administering the Filesystem

Introduction

Creating a virtual block device

Getting ready

How to do it...

How it works...

There's more...

Formatting and mounting a filesystem

Getting ready

How to do it...

How it works…

There's more...

Using disk quotas

Getting ready

How to do it...

Enabling user and group quotas

Enabling project (directory) quotas

How it works...

There's more...

Maintaining a filesystem

Getting ready

How to do it...

How it works...

There's more...

Extending the capacity of the filesystem

Getting ready

How to do it...

How it works...

6. Providing Security

Introduction

Locking down remote access and hardening SSH

Getting ready

How to do it...

How it works...

There's more...

Changing the SSH port number of your server

Limiting SSH access by user or group

Installing and configuring fail2ban

Getting ready

How to do it...

How it works...

Working with a firewall

Getting ready

How to do it...

How it works...

There's more...

Forging the firewall rules by example

Getting ready

How to do it...

To change an existing firewalld service (ssh)

To create your own new service

How it works...

There's more...

Generating self-signed certificates

Getting ready

How to do it...

How it works...

There's more...

Using secure alternatives to FTP

Getting ready

How to do it...

Securing your vsftpd server with SSL–FTPS

Securing your vsftpd server using SSH – SFTP

How it works...

There's more...

7. Building a Network

Introduction

Printing with CUPS

Getting ready

How to do it...

How it works...

There's more...

How to add a network printer to the CUPS server

How to share a local printer to the CUPS server

Running a DHCP server

Getting ready

How to do it...

How it works...

There's more...

Using WebDAV for file sharing

Getting ready

How to do it…

How it works…

Installing and configuring NFS

Getting ready

How to do it...

Installing and configuring the NFS server

Creating an export share

How it works...

Working with NFS

Getting ready

How to do it...

How it works...

Securely sharing resources with Samba

Getting ready

How to do it...

How it works...

There's more...

8. Working with FTP

Introduction

Installing and configuring the FTP service

Getting ready

How to do it...

How it works...

There's more...

Working with virtual FTP users

Getting ready

How to do it...

How it works...

Customizing the FTP service

Getting ready

How to do it...

How it works...

Troubleshooting users and file transfers

Getting ready

How to do it...

How it works...

9. Working with Domains

Introduction

Installing and configuring a caching-only nameserver

Getting ready

How to do it...

Configuring a caching-only Unbound DNS server

Configuring a forwarding only DNS server

How it works...

There's more...

Setting up an authoritative-only DNS server

Getting ready

How to do it...

How it works...

There's more...

Creating an integrated nameserver solution

Getting ready

How to do it...

How it works

There's more...

Populating the domain

Getting ready

How to do it...

How it works…

Building a secondary (slave) DNS server

Getting ready

How to do it...

Changes to the primary DNS server

Changes to the secondary DNS server(s)

How it works...

10. Working with Databases

Introduction

Installing a MariaDB database server

Getting ready

How to do it...

How it works...

Managing a MariaDB database

Getting ready

How to do it...

How it works...

There's more...

Reviewing and revoking permissions or dropping a user

Allowing remote access to a MariaDB server

Getting ready

How to do it...

How it works...

Installing a PostgreSQL server and managing a database

Getting ready

How to do it...

How it works...

There's more...

Configuring remote access to PostgreSQL

Getting ready

How to do it...

How it works...

Installing phpMyAdmin and phpPgAdmin

Getting ready

How to do it...

Installing and configuring phpMyAdmin

Installing and configuring phpPgAdmin

How it works...

11. Providing Mail Services

Introduction

Configuring a domain-wide mail service with Postfix

Getting ready

How to do it...

How it works...

There's more...

Changing an e-mail's appearing domain name

Using TLS- (SSL) encryption for SMTP communication

Configure BIND to use your new mailserver

Working with Postfix

How to do it...

Connecting mailx to a remote MTA

Reading your local mails from the mailbox

How it works...

Delivering the mail with Dovecot

Getting ready

How to do it...

How it works...

There's more...

Setting up e-mail software

Using Fetchmail

Getting ready

How to do it...

How it works...

There's more...

Configuring Fetchmail with gmail.com and outlook.com e-mail accounts

Automating Fetchmail

12. Providing Web Services

Introduction

Installing Apache and serving web pages

Getting ready

How to do it...

How it works...

Enabling system users and building publishing directories

Getting ready

How to do it...

How it works...

Implementing name-based hosting

Getting ready

How to do it...

How it works...

Implementing CGI with Perl and Ruby

Getting ready

How to do it...

Creating your first Perl CGI script

Creating your first Ruby CGI script

How it works...

There's more...

Installing, configuring, and testing PHP

Getting ready

How to do it...

How to do it...

Securing Apache

Getting ready

How to do it...

Configuring httpd.conf to provide better security

Removing unneeded httpd modules

Protecting your Apache files

How it works...

Setting up HTTPS with Secure Sockets Layer (SSL)

Getting ready

How to do it...

How it works...

There's more...

13. Operating System-Level Virtualization

Introduction

Installing and configuring Docker

Getting ready

How to do it...

How it works...

Downloading an image and running a container

Getting ready

How to do it...

How it works...

There's more...

Stopping and starting a container

Attaching and interacting with your container

Creating your own images from Dockerfiles and uploading to Docker Hub

Getting ready

How to do it...

Uploading your image to the Docker Hub

How it works...

Setting up and working with a private Docker registry

Getting ready

How to do it...

Steps to be done on our Docker registry server (192.168.1.100)

Steps to be done on every client needing access to our registry

How it works...

14. Working with SELinux

Introduction

Installing and configuring important SELinux tools

Getting ready

How to do it...

How it works...

There's more...

Working with SELinux security contexts

Getting ready

How to do it...

How it works...

Working with policies

Getting ready

How to do it...

How it works...

There's more...

Troubleshooting SELinux

Getting ready

How to do it...

How it works...

15. Monitoring IT Infrastructure

Introduction

Installing and configuring Nagios Core

Getting ready

How to do it...

How it works...

Setting up NRPE on remote client hosts

Getting ready

How to do it...

How it works...

Monitoring important remote system metrics

Getting ready

How to do it...

How it works...

3. Module 3

1. Working with KVM Guests

Introduction

Installing and configuring a KVM

Getting ready

How to do it…

Manual installation

Kickstart installation

Graphical setup during the system's setup

See also

Configuring resources

Getting ready

How to do it…

Creating storage pools

Querying storage pools

Removing storage pools

Creating a virtual network

Removing networks

How it works…

There's more…

Local storage pools

Networked or shared storage pools

See also

Building guests

Getting ready

How to do it…

Create a guest

Deleting a guest

How it works…

There's more…

See also

Adding CPUs on the fly

Getting ready

How to do it…

On the KVM host, perform the following steps:

On the KVM guest, perform the following:

Adding RAM on the fly

Getting ready

How to do it…

Adding disks on the fly

Getting ready

How to do it…

How it works…

There's more…

Moving disks to another storage

Getting ready

How to do it…

How it works…

There's more…

Moving VMs

Getting ready

How to do it…

Live native migration over the default network

Live native migration over a dedicated network

How it works…

There's more…

See also

Backing up your VM metadata

How to do it…

How it works…

See also

2. Deploying RHEL "En Masse"

Introduction

Creating a kickstart file

Getting ready

How to do it…

How it works…

There's more…

See also

Publishing your kickstart file using httpd

How to do it…

There's more…

See also

Deploying a system using PXE

Getting ready

How to do it…

How it works…

There's more…

See also

Deploying a system using a custom boot ISO file

How to do it…

How it works…

3. Configuring Your Network

Introduction

Creating a VLAN interface

Getting ready

How to do it…

Creating the VLAN connection with nmcli

Creating the VLAN connection with nmtui

Creating the VLAN connection with kickstart

There's more…

See also

Creating a teamed interface

Getting ready

How to do it…

Creating the teamed interface using nmcli

Creating the teamed interface using nmtui

Creating the teamed interface with kickstart

There's more…

nmcli

nmtui

kickstart

See also

Creating a bridge

Getting ready

How to do it…

Creating a bridge using nmcli

Creating a bridge using nmtui

Creating a bridge with kickstart

There's more…

See also

Configuring IPv4 settings

How to do it…

Setting your IPv4 configuration using nmcli

Setting your IPv4 configuration using nmtui

There's more…

Configuring your DNS resolvers

How to do it…

Setting your DNS resolvers using nmcli

Setting your DNS resolvers using nmtui

There's more…

Configuring static network routes

How to do it…

Configuring static network routes using nmcli

Configuring network routes using nmtui

4. Configuring Your New System

Introduction

The systemd service and setting runlevels

How to do it…

There's more…

See also

Starting and stopping systemd services

How to do it…

There's more…

See also

Configuring the systemd journal for persistence

How to do it…

There's more…

See also

Monitoring services using journalctl

How to do it…

There's more…

See also

Configuring logrotate

How to do it…

How it works…

There's more…

See also

Managing time

How to do it…

Managing time through chrony

Managing time through ntpd

There's more…

See also

Configuring your boot environment

How to do it…

How it works…

There's more…

See also

Configuring smtp

How to do it…

There's more…

See also

5. Using SELinux

Introduction

Changing file contexts

Getting ready

How to do it…

Temporary context changes

Persistent file context changes

There's more…

See also

Configuring SELinux booleans

How to do it…

Listing SELinux booleans

Changing SELinux booleans

There's more…

Configuring SELinux port definitions

How to do it…

There's more…

Troubleshooting SELinux

Getting ready

How to do it…

audit.log

syslog

ausearch

There's more…

See also

Creating SELinux policies

Getting ready

How to do it…

How it works…

There's more…

See also

Applying SELinux policies

Getting ready

How to do it...

How it works…

There's more…

See also

6. Orchestrating with Ansible

Introduction

Install Ansible

Getting ready

How to do it…

Installing the latest tarball

Installing cutting edge from Git

Installing Ansible from the EPEL repository

There's more…

Configuring the Ansible inventory

How to do it…

The static inventory file

The dynamic inventory file

host_vars files

group_vars files

How it works…

There's more…

See also

Creating a template for a kickstart file

Getting ready

How to do it…

How it works…

There's more…

See also

Creating a playbook to deploy a new VM with kickstart

Getting ready

How to do it…

How it works…

There's more…

See also

Creating a playbook to perform system configuration tasks

Getting ready

How to do it…

There's more…

See also

Troubleshooting Ansible

Getting ready

How to do it…

How it works…

There's more…

7. Puppet Configuration Management

Introduction

Installing and configuring Puppet Master

How to do it…

There's more…

See also

Installing and configuring the Puppet agent

How to do it…

There's more…

Defining a simple module to configure time

Getting ready

How to do it…

How it works...

There's more...

See also

Defining nodes and node grouping

How to do it…

Create the configuration node

Create a node group

There's more…

Deploying modules to single nodes and node groups

How to do it…

Configure to deploy a module or manifest to a single client

Configure to deploy a module or manifest to a node group

Configure to deploy to all registered systems

Deploy to a system

There's more…

8. Yum and Repositories

Introduction

Managing yum history

How to do it…

Your yum history

Information about a yum transaction or package

Undoing/redoing certain yum transactions

Roll back to a certain point in your transaction history

There's more…

See also

Creating a copy of an RHN repository

Getting ready

How to do it…

Syncing RHN repositories

There's more…

See also

Configuring additional repositories

Getting ready

How to do it…

There's more…

See also

Setting up yum to automatically update

Getting ready

How to do it…

How it works…

There's more…

See also

Configuring logrotate for yum

How to do it…

How it works…

See also

Recovering from a corrupted RPM database

Getting ready

How to do it…

There's more…

9. Securing RHEL 7

Introduction

Installing and configuring IPA

Getting ready

How to do it…

Installing the IPA server

Installing the IPA client

There's more…

See also

Securing the system login

How to do it…

How it works…

There's more…

See also

Configuring privilege escalation with sudo

Getting ready

How to do it…

There's more…

See also

Secure the network with firewalld

How to do it…

Showing the currently allowed services and ports on your system

Allowing incoming requests for NFS (v4)

Allowing incoming requests on an arbitrary port

There's more…

See also

Using kdump and SysRq

How to do it…

Installing and configuring kdump and SysRq

Using kdump tools to analyze the dump

There's more…

See also…

Using ABRT

How to do it…

Installing and configuring abrtd

Using abrt-cli

There's more…

See also

Auditing the system

How to do it…

Configuring a centralized syslog server to accept audit logs

Some audit rules

Showing audit logs for the preceding rules

See also

10. Monitoring and Performance Tuning

Introduction

Tuning your system's performance

How to do it…

There's more…

See also

Setting up PCP – Performance Co-Pilot

How to do it…

The default installation

The central collector

There's more…

See also

Monitoring basic system performance

How to do it…

There's more…

Monitoring CPU performance

How to do it…

Monitoring RAM performance

How to do it…

Monitoring storage performance

How to do it…

Monitoring network performance

How to do it…

Bibliography

Index