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15.4. Impressing Your Friends with RPM

RPM is a useful tool for both managing your system and diagnosing and fixing problems. The best way to make sense of all of its options is to look at some examples.
  • Perhaps you have deleted some files by accident, but you are not sure what you deleted. To verify your entire system and see what might be missing, you could try the following command:
    Copy to Clipboard Toggle word wrap 
    rpm -Va
    If some files are missing or appear to have been corrupted, you should probably either re-install the package or uninstall and then re-install the package.
  • At some point, you might see a file that you do not recognize. To find out which package owns it, enter:
    Copy to Clipboard Toggle word wrap 
    rpm -qf /usr/bin/ggv
    The output would look like the following:
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    ggv-2.6.0-2
  • We can combine the above two examples in the following scenario. Say you are having problems with /usr/bin/paste. You would like to verify the package that owns that program, but you do not know which package owns paste. Enter the following command,
    Copy to Clipboard Toggle word wrap 
    rpm -Vf /usr/bin/paste
    and the appropriate package is verified.
  • Do you want to find out more information about a particular program? You can try the following command to locate the documentation which came with the package that owns that program:
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    rpm -qdf /usr/bin/free
    The output would be similar to the following:
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    /usr/share/doc/procps-3.2.3/BUGS
/usr/share/doc/procps-3.2.3/FAQ
/usr/share/doc/procps-3.2.3/NEWS
/usr/share/doc/procps-3.2.3/TODO
/usr/share/man/man1/free.1.gz
/usr/share/man/man1/pgrep.1.gz
/usr/share/man/man1/pkill.1.gz
/usr/share/man/man1/pmap.1.gz
/usr/share/man/man1/ps.1.gz
/usr/share/man/man1/skill.1.gz
/usr/share/man/man1/slabtop.1.gz
/usr/share/man/man1/snice.1.gz
/usr/share/man/man1/tload.1.gz
/usr/share/man/man1/top.1.gz
/usr/share/man/man1/uptime.1.gz
/usr/share/man/man1/w.1.gz
/usr/share/man/man1/watch.1.gz
/usr/share/man/man5/sysctl.conf.5.gz
/usr/share/man/man8/sysctl.8.gz
/usr/share/man/man8/vmstat.8.gz
  • You may find a new RPM, but you do not know what it does. To find information about it, use the following command:
    Copy to Clipboard Toggle word wrap 
    rpm -qip crontabs-1.10-7.noarch.rpm
    The output would be similar to the following:
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    Name        : crontabs                     Relocations: (not relocatable)
Version     : 1.10                              Vendor: Red Hat, Inc
Release     : 7                             Build Date: Mon 20 Sep 2004 05:58:10 PM EDT
Install Date: (not installed)               Build Host: tweety.build.redhat.com
Group       : System Environment/Base       Source RPM: crontabs-1.10-7.src.rpm
Size        : 1004                             License: Public Domain
Signature   : DSA/SHA1, Wed 05 Jan 2005 06:05:25 PM EST, Key ID 219180cddb42a60e
Packager    : Red Hat, Inc <http://bugzilla.redhat.com/bugzilla>
Summary     : Root crontab files used to schedule the execution of programs.
Description :
The crontabs package contains root crontab files. Crontab is the
program used to install, uninstall, or list the tables used to drive the
cron daemon. The cron daemon checks the crontab files to see when
particular commands are scheduled to be executed. If commands are
scheduled, then it executes them.
  • Perhaps you now want to see what files the crontabs RPM installs. You would enter the following:
    Copy to Clipboard Toggle word wrap 
    rpm -qlp crontabs-1.10-5.noarch.rpm
    The output is similar to the following:
    Copy to Clipboard Toggle word wrap 
    /etc/cron.daily
/etc/cron.hourly
/etc/cron.monthly
/etc/cron.weekly
/etc/crontab
/usr/bin/run-parts
These are just a few examples. As you use it, you will find many more uses for RPM.
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