Additional resources Preparing an installation source Installing, managing, and removing user-space components. The DVD ISO image file contains all repositories and software packages and does not require any additional configuration.
See Preparing an installation source for more information. Prerequisites You have an active Red Hat subscription. Optional: Select the Packages tab to view the packages contained in the selected variant. Prerequisites Install curl and jq package: If your distribution uses the yum package manager: yum install curl yum install jq If your distribution uses the dnf package manager: dnf install curl dnf install jq If your distribution uses the apt package manager: apt update apt install curl apt install jq.
Procedure Create a bash file with the following content:! Make this file executable. Use password management that is consistent with networking best practices. Distributed as installable-only ISO images. You will have access to all of the currently supported releases of Red Hat Enterprise Linux, including 5 and 6.
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Editor's note: Modifying Red Hat Enterprise Linux installation media is not a supported process, but this handy workaround may be useful to you. Please see this solution on the Red Hat Customer Portal for more information and other options that you may wish to consider for your environment. Customers often ask how they can reduce the installation media to make delivery over slower networks faster.
The default RHEL 7. Chapter 9. Hardware Enablement. The rtlwifi driver family from upstream Linux kernel has been backported to support new Realtek wireless devices such as RTLCE, which are used on some variants of Lenovo laptops. This update introduces the NCT kernel hwmon driver. This driver also implements the Ethernet interfaces for some adapter cards. This update introduces support for the O2Micro sdhci card reader model , which is used on newer Lenovo laptops. This update introduces a driver update that provides support for additional solarflare devices and features.
The newly supported devices are:. The ppcdiag packages have been upgraded to upstream version 2. Several security-related issues have been fixed, such as memory leaks, buffer overflows, and replacing the popen function with execv calls. Diagnostics support for the disk drive enclosure has been added. The librtas packages, which provide an IBM utility for the bit PowerPC architecture support, have been updated to version 1.
With this update, the libofdt library has been decommissioned from the librtas package. The lsvpd packages, which provide an IBM utility for the bit PowerPC architecture support, have been updated to version 1. Additionally, the lsmcode utility adds support for OpenPower system.
The servicelog packages, which provide an IBM utility for the bit PowerPC architecture support, have been updated to version 1. The iprutils packages, which provide an IBM utility for the bit PowerPC architecture support, have been updated to version 2. It is recommend to use the latest version of iprutils. If a system has already installed iprutils Chapter Installation and Booting.
The default log level of the NetworkManager utility has been increased to make debugging the installation process easier.
Before this update, if Now, if the The ipr driver has been upgraded to upstream version 2. The ixgbe NIC driver has been upgraded to upstream version 4. Null pointer crashes related to VLAN support have been fixed. Several PHY-related problems have been addressed: link disruptions and link flapping. With this update, Level 2 L2 processor cache information such as the base cache or the number of cache leaves is gathered using the CPUID instruction.
The bnx2 NIC driver has been upgraded to upstream version 2. Bandwidth allocation for some MF modes has been fixed. The e NIC driver has been upgraded to upstream version 3. Notably, the update adds error checking around DMA mapping to avoid resource leaks and fixes a possible NULL pointer dereference during initialization.
The ee driver has been upgraded to upstream version 3. Now, IPv6 multicast messages are sent only to ports with subscribed multicast receivers. To support a greater range of hardware and incorporate numerous bug fixes, perf has been updated.
Notable enhancements include:. Added support for additional model numbers of 5th Generation Intel Core i7 processors. Enabled support for the uncore subsystem for Intel Xeon v3 and v4 processors. Enabled support for the uncore subsystem for Intel Xeon Processor D The time taken to complete a crash dump on systems with large quantities of memory has been reduced in kexec-tools and makedumpfile by making use of mmap to remove empty and unneeded pages. To enable access to the GPU functionality of some Intel processors without recompiling a custom kernel, Interval Tree support has been added.
The kernel has been updated to contain the latest microcode definitions for all Intel processors. This is the latest update from Intel at the time of publishing and is designated version Basic multihoming support has been added to Stream Control Transmission Protocol SCTP , allowing traffic between secondary endpoints to pass through where it would previously be classified as invalid and blocked by most common firewall configurations.
The source codes of mpt2sas and mpt3sas drivers have been merged. Unlike in upstream, Red Hat Enterprise Linux 6 continues to maintain two binary drivers for compatibility reasons. Fadump is supported only on PowerPC architecture. The goal of fadump is to enable the dump of a crashed system, and to do so from a fully-reset system, and to minimize the total elapsed time until the system is back in production use.
Fadump is integrated with kdump infrastructure present in the user space to seemlessly switch between kdump and fadump mechanisms. To be able to label device nodes, most commonly disks, as used by certain applications, this update provides the possibility to apply SELinux labels on device nodes created by udev. The system administrator can set a new option to give a label to a newly created device node as follows:. The libevdev packages have been added to Red Hat Enterprise Linux 6.
These packages contain a library to wrap kernel evdev devices and provide a proper API to interact with these devices. For firmware rev The lpfc driver in Red Hat Enterprise Linux 6. If any of the messages are seen in the logs and the link does not come up, contact Broadcom-ECD technical support. In Red Hat Enterprise Linux 6. The NetworkManager-openswan package now supports both openswan and libreswan in order to facilitate migration. A new package, chrony , has been added to Red Hat Enterprise Linux 6.
It can be also used with the timemaster service from the linuxptp package to synchronize the clock to Precision Time Protocol PTP domains with sub-microsecond accuracy if hardware timestamping is available, and provide a fallback to other PTP domains or NTP sources. The ldns packages contain a library with the aim to simplify DNS programming in C. A higher level API has been defined which allows a programmer to, for instance, create or sign packets. This update adds the capability to save log messages into the system log, allowing you to use additional features provided by syslog such as remote logging.
The Network Configuration tool the system-config-network package has received multiple user interface improvements in this release. Unbound is a validating, recursive, and caching DNS resolver. The VLAN id is no longer limited to the range in nm-connection-editor. The new allowed range is between 0 and NetworkManager now allows you to specify a certain frequency band such for a Wi-Fi connection.
Values for this option are based on the IEEE With these updates, basic system tools, such as yum , stunnel , vsftpd , Git , or Postfix have been modified to support the 1. This is to ensure that the tools are not vulnerable to security exploits that exist for older versions of the protocol.
This means that it is no longer necessary to explicitly enable it in applications that use NSS library defaults. With this update, pycurl has been enhanced to support options that make it possible to require the use of the 1. Support for the TLS protocol version 1. The openswan packages have been deprecated, and libreswan packages have been introduced as a direct replacement for openswan. Note that the openswan packages remain available in the repository.
To install openswan instead of libreswan , use the -x option of yum to exclude libreswan : yum install openswan -x libreswan. The shadow-utils package, which provides utilities for managing user and group accounts, has been rebased to version 4. This is the same as the version of shadow-utils in Red Hat Enterprise Linux 7.
Enhancements include improved auditing, which was corrected to provide a better record of system-administrator actions on the user-account database. The main new feature added to this package is the support for operation in chroot environments using the --root option of the respective tools. The audit package, which provides the user-space utilities for storing and searching the audit records generated by the audit subsystem in the Linux kernel, has been rebased to version 2.
This update includes enhanced event interpretation facilities that provide more system-call names and arguments to make the understanding of events easier. This update also has an important behavior change in the way that auditd records events to disk. If you are using either data or sync modes for the flush setting in auditd.
This is because it was previously not properly informing the kernel that full synchronous writes should be used. This was corrected, which has improved the reliability of the operation, but this has come at the expense of performance. If the performance drop is not tolerable, the flush setting should be changed to incremental and the freq setting will control how often auditd instructs the kernel to synchronize all records to disk.
A freq setting of should give good performance while making sure that new records are flushed to disk periodically. Certificate and host-name verification, which is disabled by default, has been implemented in the World Wide Web library for Perl LWP, also called libwww-perl.
Notable enhancements include support for the OVAL The scap-workbench package has been rebased to version 1. It can help the administrator choose a product that needs to be scanned instead of choosing content files.
The new version also offers a number of performance and user-experience improvements, including improved rule searching in the tailoring window and the possibility to fetch remote resources in SCAP content using the GUI. The scap-security-guide package has been rebased to the latest upstream version 0.
These include several improved or completely new profiles for both Red Hat Enterprise Linux 6 and 7, added automated checks and remediation scripts for many rules, human readable OVAL IDs that are consistent between releases, or HTML-formatted guides accompanying each profile.
The use of the insecure SSLv3 protocol and RC4 algorithm has been disabled in luci , the web-based high availability administration application. By default, only TLSv1. These settings can be used either globally, or independently for both secure channels HTTPS web UI access and connection with ricci instances.
Servers and Services. The attribute allows to disable support for using URL rewriting to track session IDs for specific contexts.
For example, a log event is now created when a client successfully finishes downloading a file, or the file not found message is provided in case of a failure. In previous versions, the Squid caching and forwarding web proxy had the ability to log the URL, which included the host name.
However, Squid could not log the IP address of the destination server. This update enables Squid to log IP addresses and ports of remote hosts, which is especially useful when dealing with hosts that have multiple IP addresses. Now, the user can configure a server to treat such a machine as a single entity regardless of the OS it runs at the moment with a new ignore-client-uids option.
This option causes the server to not record a client's UID in its lease. This configuration causes that the UID for clients will not be recorded. If this statement is not present or has a value of false or off, then client UIDs will be recorded. A new oracle Tuned profile, which is specifically optimized for the Oracle databases load, is now available.
The new profile is delivered in the tuned-profiles-oracle subpackage, so that other related profiles can be added in the future. The oracle profile is based on the enterprise-storage profile, but modifies kernel parameters based on Oracle database requirements and turns transparent huge pages off.
A new package squid34 version 3. This package cannot be installed together with the squid package. The most important new features in squid34 include:. Helper protocol extensions.
Systems connected to several physical networks might require different access policies. After CVE Logjam was discovered, the gss-group1-sha1 algorithm is not considered secure anymore. Previously, there was no possibility to disable this single key exchange method. The feature has been backported from the upstream version. This feature has been implemented in the asymmetric logical unit access ALUA prioritizer, and reduces the number of commands sent to the target array.
As a result, target arrays are no longer overloaded with commands if there is a large number of paths. This behavior for asynchronous checkers can be configured in the same way as for synchronous checkers.
The nfsidmap -d option has been added to display the system's effective NFSv4 domain name on stdout. Idling CIFS clients send an echo call every 60 seconds. The echo interval is hard-coded, and is used to calculate the timeout value for an unreachable server.
With this feature, users can change the echo interval setting, which enables them to change the timeout interval for unresponsive servers. The dmstats program provides a similar functionality to the iostats program, but at levels of finer granularity than a whole device. For information on the dmstats program, see the dmstats 8 man page. The multipathd formatted ouput commands now offer a raw format mode that removes the headers and additional padding between fields. Support for additional format wildcards has been added as well.
Raw format mode makes it easer to collect and parse information about multipath devices, particularly for use in scripting. For information on raw format mode, see the DM Multipath Guide. System and Subscription Management. The search-disabled-repos plug-in for yum has been added to the subscription-manager packages.
This plug-in allows users to successfully complete yum operations that fail due to the source repository being dependent on a disabled repository. When search-disabled-repos is installed in the described scenario, yum displays instructions to temporarily enable repositories that are currently disabled and to search for missing dependencies.
The yum utility is now able to identify certain frequently occurring errors and provides a link to a relevant Red Hat Knowledgebase article. This helps users identify typical problems and address their cause. Relax-and-Recover rear is a recovery and system migration utility.
Written in bash , it allows you to use tools already present on your system to continuously create recovery images which can be saved locally or on a remote server, and to use these images to easily restore the system in case of software or hardware failure. The rear utility is available in base channels for all variants of Red Hat Enterprise Linux 6.
The utility produces a bootable image and restores from backup using this image. It also allows to restore to different hardware and can therefore be used as a migration utility as well.
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