up2date 升级 Redhat enterprise Linux 的方法

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Q. How do I use up2date command to update Redhat enterprise Linux server via RHN?
A. For Redhat enterprise Linux operating systems, you need to get updates from
RHN
via Redhat Network Satellite/proxy servers (usually used by big hosting/ISPs or larget RHEL installation setups) to install critical and non-critical security updates as well as binary packages.
Task: Register my system with RHN
To register your system with RHN type the following command and just follow on screen instructions:
# up2date --register
Task: Display list of updated software (security fix)
Type the following command at shell prompt:
# up2date -l
Task: Patch up system by applying all updates
To download all update type the following command:
# up2date -u
Task: Forcefully update or patching
Sometime you need to forcefully apply updates. By default RHN does not install new kernel, so you need to run updates using following command:
# up2date -uf
Task: Install new software/rpm
Use up2date command to install new RPM from RHN:
# up2date httpd
Task: Update installed software
To fix latest bugs or to apply a patch use up2date command as follows for php package:
# up2date php
Task: Download source RPM files
Download source packages only but don't install:
# up2date -d --src Package-Name
Task: Display the list of available packages
# up2date --showall
# up2date --showall | grep httpd
Task: Install particular architecture package
If you are using 64 bit RHEL version it is possible to install 32 packages:
# up2date --arch=i386 mysql
Above command will install mysql 32 bit version instead of 64 bit version.
Task: Display what package provides the file
You can easily find out what RPM package provides the file. For example find out what provides the /etc/passwd file:
# up2date --whatprovides "/etc/passwd"
Output:
setup-2.5.37-1.3.noarch
It queries the RHN servers to resolve the comma separated list of dependencies. It will return a list of packages that will satisfy these dependencies.
Task: Display list of group software
Option --show-groups displays all the component groups that are installable via up2date command. This is good to
install entire
set of software such as development environment.

# up2date --show-groups  
Output:Administration Tools
Arabic Support
Assamese Support
Authoring and Publishing
GNOME
GNOME Desktop Environment
GNOME Software Development
Games and Entertainment
Windows File Server
Workstation Common
X Software Development
X Window System
XEmacs
To install group X Software Development just type the command:

# up2date -i "@ X Software Development "
Read man page of up2date command for more information:

man up2date



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