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configuration compatibilities between the previous and updated versions. If you are trying to install a package that is older than the one already installed, then you need to use the --oldpackages option. # rpm -Uvh mozilla-1.0.1-24.i386.rpm If you are installing from a CD-ROM, you can change to the CD-ROM s RPMS directory, which holds the RPM packages (the RPMS directory may be located within a directory like RedHat on the Red Hat CD-ROM). An ls command lists all the software packages. If you know how the name of a package begins, you should include that with the ls command and an attached *. The list of packages is extensive and does not all fit on one screen. This is helpful for displaying the detailed name of the package. The following example lists most X Window System packages: # ls x*
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In the next example, the user first installs a new package with the -i option, and then updates a package with the -U option. Including the -v and -h options is customary. Here, -v is the verbose option that displays all files as they are installed, and -h displays a crosshatch symbol periodically to show RPM is still working. In the following example, the user installs the software package for the Balsa mail client. Notice the full filename is entered. To list the full name, you can use the ls command with the first few characters and an asterisk, ls balsa*. The rpm command with the -q option is then used to check that the software was installed. For installed packages only, the software name needs to be used in this case, balsa-1.2.4-7. [root@turtle mypackages]# ls balsa* balsa-1.2.4-7.i386.rpm [root@turtle mypackages]# rpm -ivh balsa-1.2.4-7.i386.rpm balsa-1.2.4-7 ######################################## [root@turtle mypackages]# rpm -q balsa balsa-1.2.4-7
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To display information about the installed package, use -qi; -ql displays a listing of the files a given RPM package contains. # rpm -qi balsa # rpm -ql balsa If you are worried that a software package will install on your system incorrectly, you can use the test option (--test) in the debug mode (vv) to see exactly what actions RPM will take. # rpm -ivv --test balsa-1.2.4-7.i386.rpm
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To remove a software package from your system, first use rpm -q to make sure it is actually installed. Then use the -e option to uninstall it. You needn t use the full name of the installed file. You only need the name of the application. For example, if you decide you do not need Balsa, you can remove it using the -e option and the software name, as shown here: # rpm -e balsa
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You can use the verify option (-V) to check to see if any problems occurred with the installation. RPM compares the current attributes of installed files with information about them placed in the RPM database when the package was installed. If no discrepancies exist, RPM outputs nothing. Otherwise, RPM outputs a sequence of eight characters, one for each attribute, for each file in the package that fails. Those that do not differ have a period. Those that do differ have a corresponding character code, as shown in Table 3-6: The following example verifies the ProFTPD package: [root@turtle mypackages]# rpm -V proftpd To compare the installed files directly with the files in an RPM package file, you use the -Vp option, much like the
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Attribute 5 S L T D U G M Table 3-6. Explanation MD5 checksum File size Symbolic link File modification time Device User Group Mode (includes permissions and file types) RPM Discrepancy Codes
-qp option. To check all packages, use the -Va option, as shown here: # rpm -Va If you want to verify a package, but you only know the name of a file in it, you can combine verify with the -f option. The following example verifies the RPM package containing the ftp command: # rpm -Vf /bin/ftp
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