Linux16 RPM

Red HatPackageManager

RPM1

What is RPM?

• RPM stands for Red Hat Package Manager.

• RPM command is used for installing, uninstalling, upgrading, querying, listing, and checking RPM packages on your Linux system.

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What is RPM?

• With root privilege, you can use the rpm command with appropriate options to manage the RPM software packages.

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What is RPM?

• The Red Hat Package Manager (RPM) is a toolset used to build and manage software packages on UNIX systems.

• Distributed with the Red Hat Linux distribution and its derivatives, RPM also works on any UNIX as it is open source.

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What is RPM?

• Package management is rather simple in its principles, though it can be tricky in its implementations.

• Briefly, it means the managed installation of software, managing installed software, and the removal of software packages from a system in a simplified manner.

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What is RPM?

• RPM arose out of the needs to do this effectively, and no other meaningful solution was available.

• RPM uses a proprietary file format, unlike some other UNIX software package managers.

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What is RPM?

• The naming scheme of RPM files is itself a standardized convention.

• RPMs have the format (name)-(version)-(build).(platform).rpm.

• For example, the name cat-2.4-7.i386.rpm would mean an RPM for the utility "cat" version 2.4, build 7 for the x86.

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Why Package Management...?

• At first glance you may say to yourself, "I can manage this myself. It's not that many components ..." In fact, for something as small as, say, cat, which has one executable and one man page, this may be so.

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• But consider, say, KDE, which has a mountain of components, dependencies, and likes to stick them everywhere.

• Keeping track of it all would be tough, if not impossible.

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• Package management makes it all easier. By letting a program maintain the information about the binaries, their configuration files, and everything else about them, you can identify which ones are installed, remove them easily or upgrade them readily, as well.

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• Installation becomes a snap. • You select what you want, and ask the

system to take care of the dirty work for you.

• Unpack the program, ensure that there is space, place things in the right order, and set them up for you. It's great, it's like having a valet take care of your car when you go to a restaurant.

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• Dependencies, or additional requirements for a software package, are also managed seamlessly by a good package manager.

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• Management of installed packages is also greatly facilitated by a good package management system.

• It keeps a full list of software installed, which is useful to see if you have something installed. More importantly, it makes upgrading a breeze.

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• Lastly, this makes verification of a software package quite easy to do.

• By knowing what packages are installed, and what the properties of the components are, you can quickly diagnose a problem and hopefully fix it quickly.

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Installation Using RPM

• This is the most basic RPM function, and one of the most popular: the installation of new software packages using RPM. To do this, give rpm the -i flag and point it to an RPM:

# rpm -i (package)

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• If all goes well and send you back to a command prompt without any messages.

• Use the -v flag to turn on some verbosity:

# rpm -iv (package)

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• All that gets printed out is the package name, but no statistics on the progress or what it did. You can get a hash marked output of the progress is you use the -h flag. People seem to like using -ivh together to get a "pretty" output:

# rpm -ivh (package)

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• For example, In the MySQL-client-3.23.57-1.i386.rpm file:

MySQL-client – Package Name3.23.57 – Version1 – Releasei386 – Architecture

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1) The following rpm command installs Mysql client package.

# rpm -ivh MySQL-client-3.23.57-1.i386.rpm

Preparing...#################################### [100%]

1:MySQL-client ############################## [100%]

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rpm command and options

• -i : install a package

• -v : verbose

• -h : print hash marks as the package archive is unpacked.

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• Sometimes RPM will whine (complain) about a dependency which is installed but isn't registered. Perhaps you installed it not using an RPM for the package (ie OpenSSL). To get around this, you can force it to ignore dependencies:

# rpm -ivv --nodeps (package)

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• On rare occassion RPM will mess up and insist that you have a package installed when you don't. While this is usually a sign that something is amiss, it can be worked around. Just force the installation:

• # rpm -ivv --force (package)

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2) Query all the RPM Packages using rpm –qa

• -q query operation

• -a queries all installed packages

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• To identify whether a particular rpm package is installed on your system, combine rpm and grep command as shown below. Following command checks whether cdrecord package is installed on your system.

# rpm -qa | grep 'cdrecord'

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3) Query a Particular RPM Package using rpm -q

• The above example lists all currently installed package. After installation of a package to check the installation, you can query a particular package and verify as shown below:

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4) Query RPM Packages in a various format using rpm –queryformat

• Rpm command provides an option –queryformat, which allows you to give the header tag names, to list the packages. Enclose the header tag with in {}.

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5) Which RPM package does a file belong to? – Use rpm –qf

• Let us say, you have list of files and you would want to know which package owns all these files. rpm command has options to achieve this.

• The following example shows that /usr/bin/mysqlaccess file is part of the MySQL-client-3.23.57-1 rpm.

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6) Locate documentation of a package that owns file using rpm –qdf

• Use the following to know the list of documentations, for a package that owns a file. The following command, gives the location of all the manual pages related to mysql package.

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7) Information about Installed RPM Package using rpm -qi

• rpm command provides a lot of information about an installed pacakge using rpm -qi as shown below:

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• If you have an RPM file that you would like to install, but want to know more information about it before installing, you can do the following:

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-i : view information about an rpm

-p : specify a package name

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8) List all the Files in a Package using rpm –qlp

• To list the content of a RPM package, use the following command, which will list out the files without extracting into the local directory folder.

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9) List the Dependency Packages using rpm –qRP

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10) Find out the state of files in a package using rpm –qsp

The following command is to find state (installed, replaced or normal) for all the files in a RPM package.

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11)Verify a Particular RPM Package using rpm –Vp

Verifying a package compares information about the installed files in the package with information about the files taken from the package metadata stored in the rpm database.

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• 12. Verify a Package Owning file using rpm -Vf

• The following command verify the package which owns the given filename.

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• 13. Upgrading a RPM Package using rpm –Uvh

• RPM automatically un-installs existing versions of the package before installing the new one. If an old version of the package is not found, the upgrade option will still install it.

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14. Uninstalling a RPM Package using rpm -e

• To remove an installed rpm package using -e as shown below. After uninstallation, you can query using rpm -qa and verify the uninstallation.

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15. Verifying all the RPM Packages using rpm -Va

• The following command verifies all the installed packages.

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Bibliography

1) http://linuxgazette.net/68/nazario.html

2) http://www.thegeekstuff.com/2010/07/rpm-command-examples/

3) http://linuxtutorial.info/modules.php?name=Howto&pagename=RPM-HOWTO/intro.html

Linux16 RPM

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