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CHAPTER 5: Installing Software, Live Upgrade, and Patching CHAPTER 6: Text Processing and Editing CHAPTER 7: Shells, Scripts, and Scheduling CHAPTER 8: Process Management
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Installing Software, Live Upgrade, and Patching
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ll Solaris software installed as part of the operating environment is included in an archive known as a package. Solaris packages provide an easy way to bring together application binaries, configuration files, and documentation for distribution to other systems. In addition to the Solaris packaging system, Solaris also supports standard UNIX archiving and compression tools, such as tar (tape archive) and compress. This chapter examines how you can manage packages using the standard Solaris packaging tools and the command-line interface (CLI). Operations that are reviewed in this chapter include installing packages, displaying information about packages, and removing packages primarily using the CLI tools. One of the most important aspects of system maintenance involves identifying, downloading, and installing patches that have been released for a specific revision level. Patches are binary code modifications that generally fix bugs but may also introduce new, urgently required features into existing applications and system services. This chapter looks at the process of patch installation and backing out of patches that have already been applied.
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Packages are text files that contain archives of binary applications, configuration files, documentation, and even source code. All files in the Solaris operating environment are supplied as part of a package, making it easy for you to group files associated with different applications. If files are installed without packaging, it can become difficult over the years for administrators to remember which files were installed with particular applications. Packaging makes it easy to recognize application dependencies, because all files required by a specific application can be included within the archive.
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Part II:
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System Essentials
Getting Information about Packages
Administrators can use the pkgchk command to examine the package properties of a file that has already been installed:
# pkgchk -l -p /usr/bin/mkdir Pathname: /usr/bin/mkdir Type: regular file Expected mode: 0555 Expected owner: bin Expected group: bin Expected file size (bytes): 9876 Expected sum(1) of contents: 38188 Expected last modification: Oct 06 05:47:55 PM 1998 Referenced by the following packages: SUNWcsu Current status: installed
Another advantage of using packages is that they make use of the standard installation interface provided to install Solaris packages. This means that all Solaris applications are installed using one of two standard installation applications (pkgadd or the admintool), rather than each application having its own installation program. This reduces coding time and makes it easier for administrators to install software, because they need to learn only a single interface with standard options, such as overwriting existing files. Using packages reduces the administrative overhead in software management on Solaris 10. In this chapter, we examine how to install new packages, display information about downloaded packages, and remove packages that have been previously installed on the system, by using the command-line package tools.
Live Upgrade
All the installation methods reviewed so far require that an existing system be brought to run-level 0 to start the installation process. In addition, you can expect any system that is being upgraded to be in single-user mode for a matter of hours while distribution files are copied and third-party software is reinstalled. This kind of downtime may be unacceptable for a production server. While many departmental servers no doubt have a backup server that can take their place during upgrading and installation testing, many high-end servers, such as the Sun Fire 15K, are logically divided into domains that run on a single system. A second standby system may not be available to replace a high-end server, just for the purpose of an upgrade. Note that while it s possible to configure each domain individually, many sites would prefer to keep all servers at the same release level. For such sites, Solaris 10 offers a Live Upgrade facility that allows a separate boot environment to be created, with the distribution of the new operating system files installed to an alternative location. Once the installation of the new boot environment has been completed, the system needs to be rebooted only once to allow it to run the
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