book

CentOS 7 Linux Server Cookbook - Second Edition

by Jonathan Hobson

January 2016

Beginner

326 pages

9h 5m

English

Packt Publishing

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What this book covers

Getting readyHow to do it…How it works…There's more…
ErrataPiracyQuestions
Introduction
Getting readyHow to do it...How it works…
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works…
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...Reaching rescue modeAccessing the filesystemAccessing the filesystemRe-install the CentOS boot loaderHow it works...
Getting readyHow to do it...How it works...
Introduction
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more…
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Introduction
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it worksThere's more...
Introduction
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Introduction
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works…There's more...
Getting readyHow to do it...Enabling user and group quotasEnabling project (directory) quotasHow it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Introduction
Getting readyHow to do it...How it works...There's more...Changing the SSH port number of your serverLimiting SSH access by user or group
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...To change an existing firewalld service (ssh)To create your own new serviceHow it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...Securing your vsftpd server with SSL–FTPSSecuring your vsftpd server using SSH – SFTPHow it works...There's more...
Introduction
Getting readyHow to do it...How it works...There's more...How to add a network printer to the CUPS serverHow to share a local printer to the CUPS server
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it…How it works…
Getting readyHow to do it...Installing and configuring the NFS serverCreating an export shareHow it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...
Introduction
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Introduction
Getting readyHow to do it...Configuring a caching-only Unbound DNS serverConfiguring a forwarding only DNS serverHow it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it worksThere's more...
Getting readyHow to do it...How it works…
Getting readyHow to do it...Changes to the primary DNS serverChanges to the secondary DNS server(s)How it works...
Introduction
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...Reviewing and revoking permissions or dropping a user
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Getting readyHow to do it...Installing and configuring phpMyAdminInstalling and configuring phpPgAdminHow it works...
Introduction
Getting readyHow to do it...How it works...There's more...Changing an e-mail's appearing domain nameUsing TLS- (SSL) encryption for SMTP communicationConfigure BIND to use your new mailserver
How to do it...Connecting mailx to a remote MTAReading your local mails from the mailboxHow it works...
Getting readyHow to do it...How it works...There's more...Setting up e-mail software
Getting readyHow to do it...How it works...There's more...Configuring Fetchmail with gmail.com and outlook.com e-mail accountsAutomating Fetchmail
Introduction
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...Creating your first Perl CGI scriptCreating your first Ruby CGI scriptHow it works...There's more...
Getting readyHow to do it...How to do it...
Getting readyHow to do it...Configuring httpd.conf to provide better securityRemoving unneeded httpd modulesProtecting your Apache filesHow it works...
Getting readyHow to do it...How it works...There's more...
Introduction
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...Stopping and starting a containerAttaching and interacting with your container
Getting readyHow to do it...Uploading your image to the Docker HubHow it works...
Getting readyHow 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 registryHow it works...
Introduction
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Introduction
Getting readyHow to do it...How it works...
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Content preview from CentOS 7 Linux Server Cookbook - Second Edition

Troubleshooting SELinux

In this recipe, you will learn how to troubleshoot SELinux policies, which is most often needed when access to some SELinux objects has been denied and you need to find out the reasons for it. In this recipe, we will show you how to work with the sealert tool, which will create human-readable and understandable error messages to work with.

Getting ready

To complete this recipe, you will require a working installation of the CentOS 7 operating system with root privileges. It is assumed that you are working through this chapter recipe by recipe, so by now you should have installed the SELinux tools and applied the Working with policies recipe in this chapter, as we will produce some SELinux denial events in order to show you ...