Red Hat Training

A Red Hat training course is available for Red Hat Enterprise Linux

Note di rilascio 5.5

Red Hat Enterprise Linux 5

Nuove funzioni ed aggiornamenti più importanti

Logo

Red Hat Inc.

Sommario

Le versioni minori di Red Hat Enterprise Linux rappresentano una raccolta di miglioramenti, security errata e correzioni. Le Note di rilascio di Red Hat Enterprise Linux 5.5 documentano le modifiche più importanti fatte al sistema operativo di Red Hat Enterprise Linux 5 ed alle applicazioni relative per questa release minore. Informazioni dettagliate sulle modifiche in questa versione sono disponibili all'interno delle Note tecniche.
I punti più importanti della release di Red Hat Enterprise Linux 5.5 includono l'abilitazione hardware per la piattaforma Intel Boxboro-EX, i processori AMD Magny-Cours e IBM Power 7. La virtualizzazione è stata migliorata con un supporto per schede 10 GigE SR-IOV multiple, e l'utilizzo automatico delle hugepages per la memoria del guest virtuale quando abilitato sul sistema. I miglioramenti sull'interoperabilità includono gli aggiornamenti su OpenOffice per i filtri di Microsoft Office 2007, Samba per la compatibilità con Windows 7 ed il supporto per il processo di avvio per le macchine virtuali utilizzando i servizi PXE basati su Microsoft.

1. Installation

Red Hat Enterprise Linux 5.5 introduces many bugfixes and enhancements to the system installer (anaconda).
The interactive installer has been enhanced, adding the abilty to specify additional Network File System (NFS) mount options when installing from an NFS source (BZ#493052). Additionally, install sources (e.g. kickstart files) located on password protected File Transport Protocol (FTP) servers can now be retrieved during installation (BZ#505424).
Kickstart

Kickstart provides a way for users to automate a Red Hat Enterprise Linux installation. Using kickstart, a system administrator can create a single file containing the answers to all the questions that would normally be asked during a typical installation.

Kickstart debugging and error reporting has been improved. The installer now retains kickstart scriptlets during debugging, logs standard output (stdout) and standard error (stderr) streams, and logs error messages to anaconda.log (BZ#510636).
Package groups can now be excluded in a kickstart installation in the same manner that individual packages are excluded (BZ#558516). Additionally, the bootloader command now supports the --hvargs parameter, allowing Xen hypervisor arguments to be specified during a kickstart installation (BZ#501438).
Previously, the kickstart installation method offered two options to select all packages @Everything and * (wildcard). As of Red Hat Enterprise Linux 5.5, both of these options have been deprecated. Attempting to use a select all packages option will fail, unless the kickstart file also includes package negation for conflicting packages. Therefore, to install all packages but conflicting packages, the kickstart file must contain: 
%packages
@Everything
-@Conflicts
Red Hat Enterprise Linux 5.5 includes the new package sets samba3x, freeradius2, postgres84. These package sets are only available via kickstart during system installation or through yum for existing systems.
Hardware Support

The following device drivers are now supported during installation:

  • the pmcraid driver for PMC Sierra MaxRAID Controller Adapters (BZ#532777)
  • the ibmvfs driver for Power6 Virtual FC devices (BZ#512237).
  • the bfa driver for Brocade Fibre Channel to PCIe Host Bus Adapters (BZ#475707)
  • the be2iscsi driver for ServerEngines BladeEngine 2 Open iSCSI devices (BZ#529442).

Nota

For detailed information on installation, the Installation Guide documents how to install Red Hat Enterprise Linux 5.