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Mode of Operation --initdb Other Sources of Information www.rpm.org RPM Man page (man rpm)
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Effect Builds a new RPM database; can be used with the -root and -dbpath options.
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The RPM web site with detailed documentation. Detailed list of options.
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Table 3-3.
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Red Hat Package Manager (RPM) Options (continued)
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A complete description of rpm and its capabilities is provided in the online manual: # man rpm
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NOTE The software package filename is usually
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lengthy, including information about version and release in its name. All end with .rpm.
Querying Information from RPM Packages and Installed Software
The -q option tells you if a package is already installed, and the -qa option displays a list of all installed packages. 3 Piping this output to a pager utility, such as more, is best. # rpm -qa | more 3 In the next example, the user checks to see if Mozilla is already installed on the system. Notice the full filename of the RPM archive is unnecessary. If the package is installed, your system has already registered its name and where it is located. # rpm -q mozilla mozilla-1.0.1-24 You can combine the q options with the i or l option to display information about the package. The option -qi displays information about the software, such as the version number or author (-qpi queries an uninstalled package file). The option -ql displays a listing of all the files in the software package. The --h option provides a complete list of rpm options. Common query options are shown in Table 3-4.
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Option -q application Meaning
Checks to see if an application is installed. -qa application Lists all installed RPM applications. -qf filename Queries applications that own filename. -qR application Lists applications on which this application depends. -qi application Displays all application information. -ql application Lists files in the application. -qd application Lists only documentation files in the application. -qc application Lists only configuration files in the application. Table 3-4. Query Options for Installed Software
TIP Keep in mind the distinction between the installed software package name and the package filename. The filename ends in a .rpm extension and can only be queried with a p option.
To display information taken directly from an RPM package, you add the p qualifier to the q options, as shown in Table 3-5. The -qpi combination displays information about a specific package, and -qpl displays a listing of the files a given RPM package contains. In this case, you must specify the entire filename of the RPM package. You can avoid having to enter the entire name
Option -qpi RPM-file -qpl RPM-file -qpd RPM-file -qpc RPM-file -qpR RPM-file Table 3-5. Meaning Displays all package information in the RPM package. Lists files in the RPM package. Lists only documentation files in the RPM package. Lists only configuration files in the RPM package. Lists packages on which this RPM package depends.
Query Options for RPM Packages
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simply by entering a unique part of the name and using the * filename-matching character to generate the rest. If your RPM query outputs a long list of data, like an extensive list of files, you can pipe the output to the more command to look at it screen by screen, or even redirect the output to a file. # rpm -ql mozilla | more # rpm -qpl openmotif-2.2.2-5.386.rpm > mytemp
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Installing and Updating Packages with rpm
You use the -i option to install new packages and the -U option to update currently installed packages with new versions. With an -e option, rpm uninstalls the package. If you try to use the -i option to install a newer version of an installed package, you will receive an error saying the package is already installed. When a package is installed, RPM checks its signature, using imported public keys from the software vendor. If the signature check fails, an error message is displayed, specifying NOKEY if you do not have the appropriate public key. If you want to install over an already installed package, you can force installation with the --replacepks option. Sometimes a package will include a file, like a library, that is also installed by another package. To allow a package to overwrite the file installed by another package, you use the --replacefiles option. Many packages depend on the libraries installed by other packages. If these dependent packages are not already installed, you will first have to install them. RPM informs you of the missing dependent files and suggests packages to install. If no packages are suggested, you can use the --redhatprovides option with the missing files to search for needed packages. The -U option also installs a package if it is not already installed, whereas the -F option will only update installed packages. If the package includes configuration files which will overwrite currently installed configuration file, it will save a copy of the current configuration file in a file ending with .rpmsave, such as /etc/mtools.conf.rpmsave. This preserves any customized configuration changes you may have made to the file. Be sure to also check for
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