shekkbuilder · July 8, 2015 18:14
diff --git a/rpm-org-handy-queries.txt b/rpm-org-handy-queries.txt
 A Few Handy Queries

 Below are some examples of situations you might find yourself in, and ways you can use RPM to get the information you need. Keep in mind that these are just examples. Don't be afraid to experiment!
 Finding Config Files Based on a Program Name

 You're setting up a new system, and you'd like to implement some system-wide aliases for people using the Bourne Again SHell, bash. The problem is you just can't remember the name of the system-wide initialization file used by bash, or where it resides:

 # rpm -qcf /bin/bash
 /etc/bashrc
 #
          

 Rather than spending time trying to hunt down the file, RPM finds it for you in seconds.
 Learning More About an Uninstalled Package

 Practically any option can be combined with -qp to extract information from a .rpm file. Let's say you have an unknown .rpm file, and you'd like to know a bit more before installing it:

 # rpm -qpil foo.bar
 Name        : rpm                  Distribution: Red Hat Linux Vanderbilt
 Version     : 2.3                        Vendor: Red Hat Software
 Release     : 1                      Build Date: Tue Dec 24 09:07:59 1996
 Install date: (none)                 Build Host: porky.redhat.com
 Group       : Utilities/System       Source RPM: rpm-2.3-1.src.rpm
 Size        : 631157
 Summary     : Red Hat Package Manager
 Description :
 RPM is a powerful package manager, which can be used to build, install,
 query, verify, update, and uninstall individual software packages. A
 package consists of an archive of files, and package information,
 including name, version, and description.
 /bin/rpm
 /usr/bin/find-provides
 /usr/bin/find-requires
 /usr/bin/gendiff
 /usr/bin/rpm2cpio
 /usr/doc/rpm-2.3-1
 …
 /usr/src/redhat/SOURCES
 /usr/src/redhat/SPECS
 /usr/src/redhat/SRPMS
 # 
          

 By displaying the package information, we know that we have a package file containing RPM version 2.3. We can then peruse the file list, and see exactly what it would install before installing it.
 Finding Documentation for a Specific Package

 Picking on bash some more, you realize that your knowledge of the software is lacking. You'd like to see when it was installed on your system, and what documentation is available for it:

 # rpm -qid bash
 Name        :bash                   Distribution: Red Hat Linux (Picasso)
 Version     :1.14.6                       Vendor: Red Hat Software
 Release     :2                        Build Date: Sun Feb 25 13:59:26 1996
 Install date:Mon May 13 12:47:22 1996 Build Host: porky.redhat.com
 Group       :Shells                   Source RPM: bash-1.14.6-2.src.rpm
 Size        :486557
 Description :GNU Bourne Again Shell (bash)
 /usr/doc/bash-1.14.6-2
 /usr/doc/bash-1.14.6-2/NEWS
 /usr/doc/bash-1.14.6-2/README
 /usr/doc/bash-1.14.6-2/RELEASE
 /usr/info/bash.info.gz
 /usr/man/man1/bash.1
 #
          

 You never realized that there could be so much documentation for a shell!
 Finding Similar Packages

 Looking at bash's information, we see that it belongs to the group "Shells". You're not sure what other shell packages are installed on your system. If you can find other packages in the "Shells" group, you'll have found the other installed shells:

 # rpm -qa --queryformat '%10{NAME} %20{GROUP}\n' | grep -i shells
       ash               Shells
      bash               Shells
       csh               Shells
        mc               Shells
      tcsh               Shells
 #
          

 Now you can query each of these packages, and learn more about them, too. [1]
 Finding Recently Installed Packages, Part I

 You remember installing a new package a few days ago. All you know for certain is that the package installed a new command in the /bin directory. Let's try to find the package:

 # find /bin -type f -mtime -14 | rpm -qF
 rpm-2.3-1
 #
          

 Looks like RPM version 2.3 was installed sometime in the last two weeks.
 Finding Recently Installed Packages, Part II

 Another way to see which packages were recently installed is to use the --queryformat option:

 # rpm -qa --queryformat '%{installtime} %{name}-%{version}-%{release} %{installtime:date}\n' | sort -nr +1 | sed -e 's/^[^ ]* //'
 rpm-devel-2.3-1 Thu Dec 26 23:02:05 1996
 rpm-2.3-1 Thu Dec 26 23:01:51 1996
 pgp-2.6.3usa-2 Tue Oct 22 19:39:09 1996
 …
 pamconfig-0.50-5 Tue Oct 15 17:23:22 1996
 setup-1.5-1 Tue Oct 15 17:23:21 1996
 #
          

 By having RPM include the installation time in numeric form, it was simple to sort the packages and then use sed to remove the user-unfriendly numeric time.
 Finding the Largest Installed Packages

 Let's say that you're running low on disk space, and you'd like to see what packages you have installed, along with the amount of space each package takes up. You'd also like to see the largest packages first, so you can get back as much disk space as possible:

 # rpm -qa --queryformat '%{name-%{version}-%{release} %{size}\n' | sort -nr +1
 kernel-source-2.0.18-5  20608472
 tetex-0.3.4-3  19757371
 emacs-el-19.34-1  12259914
 …
 rootfiles-1.3-1  3494
 mkinitrd-1.0-1  1898
 redhat-release-4.0-1  22
 #
          

 If you don't build custom kernels, or use TeX, it's easy to see how much space could be reclaimed by removing those packages.
 Notes
 [1]	

 Did you see this example and say to yourself, "Hey, they could've used the -g option to query for that group directly"? If you did, you've been paying attention. This is a more general way of searching the RPM database for information: we just happened to search by group in this example. 
diff --git a/tecmint-rpm-ref.txt b/tecmint-rpm-ref.txt
 Some Facts about RPM (RedHat Package Manager)

    RPM is free and released under GPL (General Public License).
    RPM keeps the information of all the installed packages under /var/lib/rpm database.
    RPM is the only way to install packages under Linux systems, if you’ve installed packages using source code, then rpm won’t manage it.
    RPM deals with .rpm files, which contains the actual information about the packages such as: what it is, from where it comes, dependencies info, version info etc.

 There are five basic modes for RPM command

    Install : It is used to install any RPM package.
    Remove : It is used to erase, remove or un-install any RPM package.
    Upgrade : It is used to update the existing RPM package.
    Verify : It is used to query about different RPM packages.
    Query : It is used for the verification of any RPM package.

 Where to find RPM packages

 Below is the list of rpm sites, where you can find and download all RPM packages.

    http://rpmfind.net
    http://www.redhat.com
    http://freshrpms.net/
    http://rpm.pbone.net/

 Read Also :

    20 YUM Command Examples in Linux
    10 Wget Command Examples in Linux
    30 Most Useful Linux Commands for System Administrators

 Please remember you must be root user when installing packages in Linux, with the root privileges you can manage rpm commands with their appropriate options.
 1. How to Check an RPM Signature Package

 Always check the PGP signature of packages before installing them on your Linux systems and make sure its integrity and origin is OK. Use the following command with –checksig (check signature) option to check the signature of a package called pidgin.

 [root@tecmint]# rpm --checksig pidgin-2.7.9-5.el6.2.i686.rpm

 pidgin-2.7.9-5.el6.2.i686.rpm: rsa sha1 (md5) pgp md5 OK

 2. How to Install an RPM Package

 For installing an rpm software package, use the following command with -i option. For example, to install an rpm package called pidgin-2.7.9-5.el6.2.i686.rpm.

 [root@tecmint]# rpm -ivh pidgin-2.7.9-5.el6.2.i686.rpm

 Preparing...                ########################################### [100%]
   1:pidgin                 ########################################### [100%]

 RPM command and options

    -i : install a package
    -v : verbose for a nicer display
    -h: print hash marks as the package archive is unpacked.

 3. How to check dependencies of RPM Package before Installing

 Let’s say you would like to do a dependency check before installing or upgrading a package. For example, use the following command to check the dependencies of BitTorrent-5.2.2-1-Python2.4.noarch.rpm package. It will display the list of dependencies of package.

 [root@tecmint]# rpm -qpR BitTorrent-5.2.2-1-Python2.4.noarch.rpm

 /usr/bin/python2.4
 python >= 2.3
 python(abi) = 2.4
 python-crypto >= 2.0
 python-psyco
 python-twisted >= 2.0
 python-zopeinterface
 rpmlib(CompressedFileNames) = 2.6

 RPM command and options

    -q : Query a package
    -p : List capabilities this package provides.
    -R: List capabilities on which this package depends..

 4. How to Install a RPM Package Without Dependencies

 If you know that all needed packages are already installed and RPM is just being stupid, you can ignore those dependencies by using the option –nodeps (no dependencies check) before installing the package.

 [root@tecmint]# rpm -ivh --nodeps BitTorrent-5.2.2-1-Python2.4.noarch.rpm

 Preparing...                ########################################### [100%]
   1:BitTorrent             ########################################### [100%]

 The above command forcefully install rpm package by ignoring dependencies errors, but if those dependency files are missing, then the program will not work at all, until you install them.
 5. How to check an Installed RPM Package

 Using -q option with package name, will show whether an rpm installed or not.

 [root@tecmint]# rpm -q BitTorrent

 BitTorrent-5.2.2-1.noarch

 6. How to List all files of an installed RPM package

 To view all the files of an installed rpm packages, use the -ql (query list) with rpm command.

 [root@tecmint]# rpm -ql BitTorrent

 /usr/bin/bittorrent
 /usr/bin/bittorrent-console
 /usr/bin/bittorrent-curses
 /usr/bin/bittorrent-tracker
 /usr/bin/changetracker-console
 /usr/bin/launchmany-console
 /usr/bin/launchmany-curses
 /usr/bin/maketorrent
 /usr/bin/maketorrent-console
 /usr/bin/torrentinfo-console

 7. How to List Recently Installed RPM Packages

 Use the following rpm command with -qa (query all) option, will list all the recently installed rpm packages.

 [root@tecmint]# rpm -qa --last

 BitTorrent-5.2.2-1.noarch                     Tue 04 Dec 2012 05:14:06 PM BDT
 pidgin-2.7.9-5.el6.2.i686                     Tue 04 Dec 2012 05:13:51 PM BDT
 cyrus-sasl-devel-2.1.23-13.el6_3.1.i686       Tue 04 Dec 2012 04:43:06 PM BDT
 cyrus-sasl-2.1.23-13.el6_3.1.i686             Tue 04 Dec 2012 04:43:05 PM BDT
 cyrus-sasl-md5-2.1.23-13.el6_3.1.i686         Tue 04 Dec 2012 04:43:04 PM BDT
 cyrus-sasl-plain-2.1.23-13.el6_3.1.i686       Tue 04 Dec 2012 04:43:03 PM BDT

 8. How to List All Installed RPM Packages

 Type the following command to print the all the names of installed packages on your Linux system.

 [root@tecmint]# rpm -qa

 initscripts-9.03.31-2.el6.centos.i686
 polkit-desktop-policy-0.96-2.el6_0.1.noarch
 thunderbird-17.0-1.el6.remi.i686

 9. How to Upgrade a RPM Package

 If we want to upgrade any RPM package “–U” (upgrade) option will be used. One of the major advantages of using this option is that it will not only upgrade the latest version of any package, but it will also maintain the backup of the older package so that in case if the newer upgraded package does not run the previously installed package can be used again.

 [root@tecmint]# rpm -Uvh nx-3.5.0-2.el6.centos.i686.rpm
 Preparing...                ########################################### [100%]
   1:nx                     ########################################### [100%]

 10. How to Remove a RPM Package

 To un-install an RPM package, for example we use the package name nx, not the original package name nx-3.5.0-2.el6.centos.i686.rpm. The -e (erase) option is used to remove package.

 [root@tecmint]# rpm -evv nx

 11. How to Remove an RPM Package Without Dependencies

 The –nodeps (Do not check dependencies) option forcefully remove the rpm package from the system. But keep in mind removing particular package may break other working applications.

 [root@tecmint]# rpm -ev --nodeps vsftpd

 12. How to Query a file that belongs which RPM Package

 Let’s say, you have list of files and you would like to find out which package belongs to these files. For example, the following command with -qf (query file) option will show you a file /usr/bin/htpasswd is own by package httpd-tools-2.2.15-15.el6.centos.1.i686.

 [root@tecmint]# rpm -qf /usr/bin/htpasswd

 httpd-tools-2.2.15-15.el6.centos.1.i686

 13. How to Query a Information of Installed RPM Package

 Let’s say you have installed an rpm package and want to know the information about the package. The following -qi (query info) option will print the available information of the installed package.

 [root@tecmint]# rpm -qi vsftpd

 Name        : vsftpd				   Relocations: (not relocatable)
 Version     : 2.2.2				   Vendor: CentOS
 Release     : 11.el6				   Build Date: Fri 22 Jun 2012 01:54:24 PM BDT
 Install Date: Mon 17 Sep 2012 07:55:28 PM BDT      Build Host: c6b8.bsys.dev.centos.org
 Group       : System Environment/Daemons           Source RPM: vsftpd-2.2.2-11.el6.src.rpm
 Size        : 351932                               License: GPLv2 with exceptions
 Signature   : RSA/SHA1, Mon 25 Jun 2012 04:07:34 AM BDT, Key ID 0946fca2c105b9de
 Packager    : CentOS BuildSystem <http://bugs.centos.org>
 URL         : http://vsftpd.beasts.org/
 Summary     : Very Secure Ftp Daemon
 Description :
 vsftpd is a Very Secure FTP daemon. It was written completely from
 scratch.

 14. Get the Information of RPM Package Before Installing

 You have download a package from the internet and want to know the information of a package before installing. For example, the following option -qip (query info package) will print the information of a package sqlbuddy.

 [root@tecmint]# rpm -qip sqlbuddy-1.3.3-1.noarch.rpm

 Name        : sqlbuddy                     Relocations: (not relocatable)
 Version     : 1.3.3                        Vendor: (none)
 Release     : 1                            Build Date: Wed 02 Nov 2011 11:01:21 PM BDT
 Install Date: (not installed)              Build Host: rpm.bar.baz
 Group       : Applications/Internet        Source RPM: sqlbuddy-1.3.3-1.src.rpm
 Size        : 1155804                      License: MIT
 Signature   : (none)
 Packager    : Erik M Jacobs
 URL         : http://www.sqlbuddy.com/
 Summary     : SQL Buddy â Web based MySQL administration
 Description :
 SQLBuddy is a PHP script that allows for web-based MySQL administration.

 15. How to Query documentation of Installed RPM Package

 To get the list of available documentation of an installed package, use the following command with option -qdf (query document file) will display the manual pages related to vmstat package.

 [root@tecmint]# rpm -qdf /usr/bin/vmstat

 /usr/share/doc/procps-3.2.8/BUGS
 /usr/share/doc/procps-3.2.8/COPYING
 /usr/share/doc/procps-3.2.8/COPYING.LIB
 /usr/share/doc/procps-3.2.8/FAQ
 /usr/share/doc/procps-3.2.8/NEWS
 /usr/share/doc/procps-3.2.8/TODO

 16. How to Verify a RPM Package

 Verifying a package compares information of installed files of the package against the rpm database. The -Vp (verify package) is used to verify a package.

 [root@tecmint downloads]# rpm -Vp sqlbuddy-1.3.3-1.noarch.rpm

 S.5....T.  c /etc/httpd/conf.d/sqlbuddy.conf

 17. How to Verify all RPM Packages

 Type the following command to verify all the installed rpm packages.

 [root@tecmint]# rpm -Va

 S.5....T.  c /etc/rc.d/rc.local
 .......T.  c /etc/dnsmasq.conf
 .......T.    /etc/ld.so.conf.d/kernel-2.6.32-279.5.2.el6.i686.conf
 S.5....T.  c /etc/yum.conf
 S.5....T.  c /etc/yum.repos.d/epel.repo

 18. How to Import an RPM GPG key

 To verify RHEL/CentOS/Fedora packages, you must import the GPG key. To do so, execute the following command. It will import CentOS 6 GPG key.

 [root@tecmint]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

 19. How to List all Imported RPM GPG keys

 To print all the imported GPG keys in your system, use the following command.

 [root@tecmint]# rpm -qa gpg-pubkey*

 gpg-pubkey-0608b895-4bd22942
 gpg-pubkey-7fac5991-4615767f
 gpg-pubkey-0f2672c8-4cd950ee
 gpg-pubkey-c105b9de-4e0fd3a3
 gpg-pubkey-00f97f56-467e318a
 gpg-pubkey-6b8d79e6-3f49313d
 gpg-pubkey-849c449f-4cb9df30

 20. How To rebuild Corrupted RPM Database

 Sometimes rpm database gets corrupted and stops all the functionality of rpm and other applications on the system. So, at the time we need to rebuild the rpm database and restore it with the help of following command.

 [root@tecmint]# cd /var/lib
 [root@tecmint]# rm __db*
 [root@tecmint]# rpm --rebuilddb
 [root@tecmint]# rpmdb_verify Packages
	A Few Handy Queries

	Below are some examples of situations you might find yourself in, and ways you can use RPM to get the information you need. Keep in mind that these are just examples. Don't be afraid to experiment!
	Finding Config Files Based on a Program Name

	You're setting up a new system, and you'd like to implement some system-wide aliases for people using the Bourne Again SHell, bash. The problem is you just can't remember the name of the system-wide initialization file used by bash, or where it resides:

	# rpm -qcf /bin/bash
	/etc/bashrc
	#


	Rather than spending time trying to hunt down the file, RPM finds it for you in seconds.
	Learning More About an Uninstalled Package

	Practically any option can be combined with -qp to extract information from a .rpm file. Let's say you have an unknown .rpm file, and you'd like to know a bit more before installing it:

	# rpm -qpil foo.bar
	Name : rpm Distribution: Red Hat Linux Vanderbilt
	Version : 2.3 Vendor: Red Hat Software
	Release : 1 Build Date: Tue Dec 24 09:07:59 1996
	Install date: (none) Build Host: porky.redhat.com
	Group : Utilities/System Source RPM: rpm-2.3-1.src.rpm
	Size : 631157
	Summary : Red Hat Package Manager
	Description :
	RPM is a powerful package manager, which can be used to build, install,
	query, verify, update, and uninstall individual software packages. A
	package consists of an archive of files, and package information,
	including name, version, and description.
	/bin/rpm
	/usr/bin/find-provides
	/usr/bin/find-requires
	/usr/bin/gendiff
	/usr/bin/rpm2cpio
	/usr/doc/rpm-2.3-1
	…
	/usr/src/redhat/SOURCES
	/usr/src/redhat/SPECS
	/usr/src/redhat/SRPMS
	#


	By displaying the package information, we know that we have a package file containing RPM version 2.3. We can then peruse the file list, and see exactly what it would install before installing it.
	Finding Documentation for a Specific Package

	Picking on bash some more, you realize that your knowledge of the software is lacking. You'd like to see when it was installed on your system, and what documentation is available for it:

	# rpm -qid bash
	Name :bash Distribution: Red Hat Linux (Picasso)
	Version :1.14.6 Vendor: Red Hat Software
	Release :2 Build Date: Sun Feb 25 13:59:26 1996
	Install date:Mon May 13 12:47:22 1996 Build Host: porky.redhat.com
	Group :Shells Source RPM: bash-1.14.6-2.src.rpm
	Size :486557
	Description :GNU Bourne Again Shell (bash)
	/usr/doc/bash-1.14.6-2
	/usr/doc/bash-1.14.6-2/NEWS
	/usr/doc/bash-1.14.6-2/README
	/usr/doc/bash-1.14.6-2/RELEASE
	/usr/info/bash.info.gz
	/usr/man/man1/bash.1
	#


	You never realized that there could be so much documentation for a shell!
	Finding Similar Packages

	Looking at bash's information, we see that it belongs to the group "Shells". You're not sure what other shell packages are installed on your system. If you can find other packages in the "Shells" group, you'll have found the other installed shells:

	# rpm -qa --queryformat '%10{NAME} %20{GROUP}\n' \| grep -i shells
	ash Shells
	bash Shells
	csh Shells
	mc Shells
	tcsh Shells
	#


	Now you can query each of these packages, and learn more about them, too. [1]
	Finding Recently Installed Packages, Part I

	You remember installing a new package a few days ago. All you know for certain is that the package installed a new command in the /bin directory. Let's try to find the package:

	# find /bin -type f -mtime -14 \| rpm -qF
	rpm-2.3-1
	#


	Looks like RPM version 2.3 was installed sometime in the last two weeks.
	Finding Recently Installed Packages, Part II

	Another way to see which packages were recently installed is to use the --queryformat option:

	# rpm -qa --queryformat '%{installtime} %{name}-%{version}-%{release} %{installtime:date}\n' \| sort -nr +1 \| sed -e 's/^[^ ]* //'
	rpm-devel-2.3-1 Thu Dec 26 23:02:05 1996
	rpm-2.3-1 Thu Dec 26 23:01:51 1996
	pgp-2.6.3usa-2 Tue Oct 22 19:39:09 1996
	…
	pamconfig-0.50-5 Tue Oct 15 17:23:22 1996
	setup-1.5-1 Tue Oct 15 17:23:21 1996
	#


	By having RPM include the installation time in numeric form, it was simple to sort the packages and then use sed to remove the user-unfriendly numeric time.
	Finding the Largest Installed Packages

	Let's say that you're running low on disk space, and you'd like to see what packages you have installed, along with the amount of space each package takes up. You'd also like to see the largest packages first, so you can get back as much disk space as possible:

	# rpm -qa --queryformat '%{name-%{version}-%{release} %{size}\n' \| sort -nr +1
	kernel-source-2.0.18-5 20608472
	tetex-0.3.4-3 19757371
	emacs-el-19.34-1 12259914
	…
	rootfiles-1.3-1 3494
	mkinitrd-1.0-1 1898
	redhat-release-4.0-1 22
	#


	If you don't build custom kernels, or use TeX, it's easy to see how much space could be reclaimed by removing those packages.
	Notes
	[1]

	Did you see this example and say to yourself, "Hey, they could've used the -g option to query for that group directly"? If you did, you've been paying attention. This is a more general way of searching the RPM database for information: we just happened to search by group in this example.
	Some Facts about RPM (RedHat Package Manager)

	RPM is free and released under GPL (General Public License).
	RPM keeps the information of all the installed packages under /var/lib/rpm database.
	RPM is the only way to install packages under Linux systems, if you’ve installed packages using source code, then rpm won’t manage it.
	RPM deals with .rpm files, which contains the actual information about the packages such as: what it is, from where it comes, dependencies info, version info etc.

	There are five basic modes for RPM command

	Install : It is used to install any RPM package.
	Remove : It is used to erase, remove or un-install any RPM package.
	Upgrade : It is used to update the existing RPM package.
	Verify : It is used to query about different RPM packages.
	Query : It is used for the verification of any RPM package.

	Where to find RPM packages

	Below is the list of rpm sites, where you can find and download all RPM packages.

	http://rpmfind.net
	http://www.redhat.com
	http://freshrpms.net/
	http://rpm.pbone.net/

	Read Also :

	20 YUM Command Examples in Linux
	10 Wget Command Examples in Linux
	30 Most Useful Linux Commands for System Administrators

	Please remember you must be root user when installing packages in Linux, with the root privileges you can manage rpm commands with their appropriate options.
	1. How to Check an RPM Signature Package

	Always check the PGP signature of packages before installing them on your Linux systems and make sure its integrity and origin is OK. Use the following command with –checksig (check signature) option to check the signature of a package called pidgin.

	[root@tecmint]# rpm --checksig pidgin-2.7.9-5.el6.2.i686.rpm

	pidgin-2.7.9-5.el6.2.i686.rpm: rsa sha1 (md5) pgp md5 OK

	2. How to Install an RPM Package

	For installing an rpm software package, use the following command with -i option. For example, to install an rpm package called pidgin-2.7.9-5.el6.2.i686.rpm.

	[root@tecmint]# rpm -ivh pidgin-2.7.9-5.el6.2.i686.rpm

	Preparing... ########################################### [100%]
	1:pidgin ########################################### [100%]

	RPM command and options

	-i : install a package
	-v : verbose for a nicer display
	-h: print hash marks as the package archive is unpacked.

	3. How to check dependencies of RPM Package before Installing

	Let’s say you would like to do a dependency check before installing or upgrading a package. For example, use the following command to check the dependencies of BitTorrent-5.2.2-1-Python2.4.noarch.rpm package. It will display the list of dependencies of package.

	[root@tecmint]# rpm -qpR BitTorrent-5.2.2-1-Python2.4.noarch.rpm

	/usr/bin/python2.4
	python >= 2.3
	python(abi) = 2.4
	python-crypto >= 2.0
	python-psyco
	python-twisted >= 2.0
	python-zopeinterface
	rpmlib(CompressedFileNames) = 2.6

	RPM command and options

	-q : Query a package
	-p : List capabilities this package provides.
	-R: List capabilities on which this package depends..

	4. How to Install a RPM Package Without Dependencies

	If you know that all needed packages are already installed and RPM is just being stupid, you can ignore those dependencies by using the option –nodeps (no dependencies check) before installing the package.

	[root@tecmint]# rpm -ivh --nodeps BitTorrent-5.2.2-1-Python2.4.noarch.rpm

	Preparing... ########################################### [100%]
	1:BitTorrent ########################################### [100%]

	The above command forcefully install rpm package by ignoring dependencies errors, but if those dependency files are missing, then the program will not work at all, until you install them.
	5. How to check an Installed RPM Package

	Using -q option with package name, will show whether an rpm installed or not.

	[root@tecmint]# rpm -q BitTorrent

	BitTorrent-5.2.2-1.noarch

	6. How to List all files of an installed RPM package

	To view all the files of an installed rpm packages, use the -ql (query list) with rpm command.

	[root@tecmint]# rpm -ql BitTorrent

	/usr/bin/bittorrent
	/usr/bin/bittorrent-console
	/usr/bin/bittorrent-curses
	/usr/bin/bittorrent-tracker
	/usr/bin/changetracker-console
	/usr/bin/launchmany-console
	/usr/bin/launchmany-curses
	/usr/bin/maketorrent
	/usr/bin/maketorrent-console
	/usr/bin/torrentinfo-console

	7. How to List Recently Installed RPM Packages

	Use the following rpm command with -qa (query all) option, will list all the recently installed rpm packages.

	[root@tecmint]# rpm -qa --last

	BitTorrent-5.2.2-1.noarch Tue 04 Dec 2012 05:14:06 PM BDT
	pidgin-2.7.9-5.el6.2.i686 Tue 04 Dec 2012 05:13:51 PM BDT
	cyrus-sasl-devel-2.1.23-13.el6_3.1.i686 Tue 04 Dec 2012 04:43:06 PM BDT
	cyrus-sasl-2.1.23-13.el6_3.1.i686 Tue 04 Dec 2012 04:43:05 PM BDT
	cyrus-sasl-md5-2.1.23-13.el6_3.1.i686 Tue 04 Dec 2012 04:43:04 PM BDT
	cyrus-sasl-plain-2.1.23-13.el6_3.1.i686 Tue 04 Dec 2012 04:43:03 PM BDT

	8. How to List All Installed RPM Packages

	Type the following command to print the all the names of installed packages on your Linux system.

	[root@tecmint]# rpm -qa

	initscripts-9.03.31-2.el6.centos.i686
	polkit-desktop-policy-0.96-2.el6_0.1.noarch
	thunderbird-17.0-1.el6.remi.i686

	9. How to Upgrade a RPM Package

	If we want to upgrade any RPM package “–U” (upgrade) option will be used. One of the major advantages of using this option is that it will not only upgrade the latest version of any package, but it will also maintain the backup of the older package so that in case if the newer upgraded package does not run the previously installed package can be used again.

	[root@tecmint]# rpm -Uvh nx-3.5.0-2.el6.centos.i686.rpm
	Preparing... ########################################### [100%]
	1:nx ########################################### [100%]

	10. How to Remove a RPM Package

	To un-install an RPM package, for example we use the package name nx, not the original package name nx-3.5.0-2.el6.centos.i686.rpm. The -e (erase) option is used to remove package.

	[root@tecmint]# rpm -evv nx

	11. How to Remove an RPM Package Without Dependencies

	The –nodeps (Do not check dependencies) option forcefully remove the rpm package from the system. But keep in mind removing particular package may break other working applications.

	[root@tecmint]# rpm -ev --nodeps vsftpd

	12. How to Query a file that belongs which RPM Package

	Let’s say, you have list of files and you would like to find out which package belongs to these files. For example, the following command with -qf (query file) option will show you a file /usr/bin/htpasswd is own by package httpd-tools-2.2.15-15.el6.centos.1.i686.

	[root@tecmint]# rpm -qf /usr/bin/htpasswd

	httpd-tools-2.2.15-15.el6.centos.1.i686

	13. How to Query a Information of Installed RPM Package

	Let’s say you have installed an rpm package and want to know the information about the package. The following -qi (query info) option will print the available information of the installed package.

	[root@tecmint]# rpm -qi vsftpd

	Name : vsftpd Relocations: (not relocatable)
	Version : 2.2.2 Vendor: CentOS
	Release : 11.el6 Build Date: Fri 22 Jun 2012 01:54:24 PM BDT
	Install Date: Mon 17 Sep 2012 07:55:28 PM BDT Build Host: c6b8.bsys.dev.centos.org
	Group : System Environment/Daemons Source RPM: vsftpd-2.2.2-11.el6.src.rpm
	Size : 351932 License: GPLv2 with exceptions
	Signature : RSA/SHA1, Mon 25 Jun 2012 04:07:34 AM BDT, Key ID 0946fca2c105b9de
	Packager : CentOS BuildSystem <http://bugs.centos.org>
	URL : http://vsftpd.beasts.org/
	Summary : Very Secure Ftp Daemon
	Description :
	vsftpd is a Very Secure FTP daemon. It was written completely from
	scratch.

	14. Get the Information of RPM Package Before Installing

	You have download a package from the internet and want to know the information of a package before installing. For example, the following option -qip (query info package) will print the information of a package sqlbuddy.

	[root@tecmint]# rpm -qip sqlbuddy-1.3.3-1.noarch.rpm

	Name : sqlbuddy Relocations: (not relocatable)
	Version : 1.3.3 Vendor: (none)
	Release : 1 Build Date: Wed 02 Nov 2011 11:01:21 PM BDT
	Install Date: (not installed) Build Host: rpm.bar.baz
	Group : Applications/Internet Source RPM: sqlbuddy-1.3.3-1.src.rpm
	Size : 1155804 License: MIT
	Signature : (none)
	Packager : Erik M Jacobs
	URL : http://www.sqlbuddy.com/
	Summary : SQL Buddy â Web based MySQL administration
	Description :
	SQLBuddy is a PHP script that allows for web-based MySQL administration.

	15. How to Query documentation of Installed RPM Package

	To get the list of available documentation of an installed package, use the following command with option -qdf (query document file) will display the manual pages related to vmstat package.

	[root@tecmint]# rpm -qdf /usr/bin/vmstat

	/usr/share/doc/procps-3.2.8/BUGS
	/usr/share/doc/procps-3.2.8/COPYING
	/usr/share/doc/procps-3.2.8/COPYING.LIB
	/usr/share/doc/procps-3.2.8/FAQ
	/usr/share/doc/procps-3.2.8/NEWS
	/usr/share/doc/procps-3.2.8/TODO

	16. How to Verify a RPM Package

	Verifying a package compares information of installed files of the package against the rpm database. The -Vp (verify package) is used to verify a package.

	[root@tecmint downloads]# rpm -Vp sqlbuddy-1.3.3-1.noarch.rpm

	S.5....T. c /etc/httpd/conf.d/sqlbuddy.conf

	17. How to Verify all RPM Packages

	Type the following command to verify all the installed rpm packages.

	[root@tecmint]# rpm -Va

	S.5....T. c /etc/rc.d/rc.local
	.......T. c /etc/dnsmasq.conf
	.......T. /etc/ld.so.conf.d/kernel-2.6.32-279.5.2.el6.i686.conf
	S.5....T. c /etc/yum.conf
	S.5....T. c /etc/yum.repos.d/epel.repo

	18. How to Import an RPM GPG key

	To verify RHEL/CentOS/Fedora packages, you must import the GPG key. To do so, execute the following command. It will import CentOS 6 GPG key.

	[root@tecmint]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

	19. How to List all Imported RPM GPG keys

	To print all the imported GPG keys in your system, use the following command.

	[root@tecmint]# rpm -qa gpg-pubkey*

	gpg-pubkey-0608b895-4bd22942
	gpg-pubkey-7fac5991-4615767f
	gpg-pubkey-0f2672c8-4cd950ee
	gpg-pubkey-c105b9de-4e0fd3a3
	gpg-pubkey-00f97f56-467e318a
	gpg-pubkey-6b8d79e6-3f49313d
	gpg-pubkey-849c449f-4cb9df30

	20. How To rebuild Corrupted RPM Database

	Sometimes rpm database gets corrupted and stops all the functionality of rpm and other applications on the system. So, at the time we need to rebuild the rpm database and restore it with the help of following command.

	[root@tecmint]# cd /var/lib
	[root@tecmint]# rm __db*
	[root@tecmint]# rpm --rebuilddb
	[root@tecmint]# rpmdb_verify Packages