Migration Planning Guide
1. Introduction
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1. 1.1. Red Hat Enterprise Linux 6
2. 1.2. Application Compatibility
2. Installation
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1. 2.1. Kernel and Boot Options
2. 2.2. Graphical Installer
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  1. 2.2.1. Devices and Disks
  2. 2.2.2. Kickstart
    
    Expand section "2.2.2. Kickstart" Collapse section "2.2.2. Kickstart"
    
    2.2.2.1. Behavioral Changes
    
    2.2.2.2. Command Changes
    
    2.2.2.3. Packages Changes
    
    2.2.2.4. Script Changes
    
    2.2.2.5. Syntax Changes
    
    2.2.2.6. Summary of Differences
    
    2.2.2.7. pykickstart
  3. 2.2.3. Networking
  4. 2.2.4. Product Subscriptions and Content Updates
3. 2.3. Text-Based Installer
3. Storage and File Systems
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1. 3.1. kdump
2. 3.2. RAID
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  1. 3.2.1. Upgrades
3. 3.3. ext4
  Expand section "3.3. ext4" Collapse section "3.3. ext4"
  1. 3.3.1. Migration from ext3
  2. 3.3.2. Behavioral changes
4. 3.4. blockdev
5. 3.5. Tape devices
4. Networking and Services
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1. 4.1. Interfaces and Configuration
2. 4.2. Service Initialization
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3. 4.3. IPTables/Firewalls
4. 4.4. Apache HTTP Server
5. 4.5. Samba
6. 4.6. PHP
7. 4.7. BIND
8. 4.8. SNMP
9. 4.9. NTP
10. 4.10. PTP
11. 4.11. Kerberos
12. 4.12. Mail
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  1. 4.12.1. Sendmail
  2. 4.12.2. Exim
  3. 4.12.3. Dovecot
    
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    4.12.3.1. Dovecot configuration
13. 4.13. MySQL®
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  1. 4.13.1. DBD Driver
14. 4.14. PostgreSQL
  Expand section "4.14. PostgreSQL" Collapse section "4.14. PostgreSQL"
  1. 4.14.1. Upgrading Databases
  2. 4.14.2. Other Changes
15. 4.15. Squid
16. 4.16. Bluetooth
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  1. 4.16.1. Bluetooth Service On Demand
17. 4.17. Cron
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  1. 4.17.1. Vixie cron and Cronie
18. 4.18. Logging
5. Command Line Tools
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6. System Configuration
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1. 6.1. ACPI
  Expand section "6.1. ACPI" Collapse section "6.1. ACPI"
  1. 6.1.1. CPU hotplug
2. 6.2. Logging
7. Desktop
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1. 7.1. GDM Configuration
8. Security and Authentication
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1. 8.1. SELinux
2. 8.2. openCryptoki
3. 8.3. SSSD
4. 8.4. LDAP
  Expand section "8.4. LDAP" Collapse section "8.4. LDAP"
  1. 8.4.1. OpenLDAP
  2. 8.4.2. Converting slapd configuration
5. 8.5. Checksums
6. 8.6. Pluggable Authentication Modules (PAM)
7. 8.7. System Users
8. 8.8. NIST SCAP 1.2 Certification
9. 8.9. Changes to RSA and DSA Key Generation
9. System Monitoring and Kernel
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1. 9.1. dracut
2. 9.2. IP Virtual Server (IPVS)
3. 9.3. Joystick support
4. 9.4. Automatic Bug Reporting Tool (ABRT)
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  1. 9.4.1. ABRT Events
10. Package and Driver Changes
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1. 10.1. System Configuration Tools Changes
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2. 10.2. Bash (Bourne-Again Shell)
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  1. 10.2.1. Regular Expressions
3. 10.3. Other Package Changes
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4. 10.4. Driver Changes
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5. 10.5. Library Changes
A. Revision History
Legal Notice

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4.12.2. Exim

Exim has been removed from Red Hat Enterprise Linux 6. Postfix is the default and recommended MTA.