RPM Commands in Linux - Part(2)

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@localhost]# 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@localhost]# 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@localhost]# 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@localhost]# 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@localhost]# 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@localhost 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@localhost]# 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@localhost]# 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@localhost]# 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@localhost]# cd /var/lib

[root@localhost]# rm __db*

[root@localhost]# rpm --rebuilddb

[root@localhost]# rpmdb_verify Packages