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RPM Updation & Keeping User Change files during removal

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Operating Systems Linux Red Hat RPM Updation & Keeping User Change files during removal
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Old 07-14-2010
RPM Updation & Keeping User Change files during removal
Hi All,

I have a RPM for an Java based application. Currently it works fine.

But recently I want to implement that when newer packages gets installed over the older one, the rpm should only update the older files with the newer one (I know this could be done by rpm -Uvh xxx.rpm), but it should not update any such file changed by the user (say a config file).

Also, during rpm removal process it should only remove only those files which were got installed during installation time, not any files which were added after post-installation process.
Current for this I have "postun" script which removes everything, but I want to keep the user added files as it is.

Can I achieve by any rpm commands or by other means.

thanks.
Last edited by jw_amp; 07-14-2010 at 03:08 PM..
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LEARN ABOUT CENTOS

pmdarpm

PMDARPM(1)						      General Commands Manual							PMDARPM(1)

NAME

       pmdarpm - RPM packages performance metrics domain agent (PMDA)

SYNOPSIS

       $PCP_PMDAS_DIR/rpm/pmdarpm [-C] [-d domain] [-l logfile] [-r path] [-U username]

DESCRIPTION

       pmdarpm	is  a  Performance Metrics Domain Agent (PMDA) which extracts performance metrics reflecting the state of the RPM package database
       managed by rpm(1).

       The rpm PMDA exports metrics that describe each package installed on a system, as well as some cumulative totals.  When	the  RPM  database
       changes the PMDA automatically detects this and uses a background thread to asynchronously refresh its values.

       A brief description of the pmdarpm command line options follows:

       -C   Verify the package iteration code by scanning the RPM database once, then exiting.	Only useful for problem diagnosis and testing.

       -d   It	is  absolutely crucial that the performance metrics domain number specified here is unique and consistent.  That is, domain should
	    be different for every PMDA on the one host, and the same domain number should be used for the same PMDA on all hosts.

       -l   Location of the log file.  By default, a log file named rpm.log is written in  the	current  directory  of	pmcd(1)  when  pmdarpm	is
	    started,  i.e.   $PCP_LOG_DIR/pmcd.   If  the  log	file cannot be created or is not writable, output is written to the standard error
	    instead.

       -r   Specify an alternate path to the RPM database (default is /var/lib/rpm/Packages).

       -U   User account under which to run the agent.	The default is the unprivileged "pcp" account.

INSTALLATION

       If you want access to the names, help text and values for the rpm performance metrics, do the following as root:

	    # cd $PCP_PMDAS_DIR/rpm
	    # ./Install

       If you want to undo the installation, do the following as root:

	    # cd $PCP_PMDAS_DIR/rpm
	    # ./Remove

       pmdarpm is launched by pmcd(1) and should never be executed directly.  The Install and Remove scripts notify  pmcd(1)  when  the  agent	is
       installed or removed.

FILES

       $PCP_PMCDCONF_PATH
		 command line options used to launch pmdarpm
       $PCP_PMDAS_DIR/rpm/help
		 default help text file for the rpm metrics
       $PCP_PMDAS_DIR/rpm/Install
		 installation script for the pmdarpm agent
       $PCP_PMDAS_DIR/rpm/Remove
		 undo installation script for the pmdarpm agent
       $PCP_LOG_DIR/pmcd/rpm.log
		 default log file for error messages and other information from pmdarpm

PCP ENVIRONMENT

       Environment  variables  with  the prefix PCP_ are used to parameterize the file and directory names used by PCP.  On each installation, the
       file /etc/pcp.conf contains the local values for these variables.  The $PCP_CONF variable may be used to specify an alternative	configura-
       tion file, as described in pcp.conf(5).

SEE ALSO

       PCPIntro(1), pmcd(1), pcp.conf(5) and pcp.env(5).

Performance Co-Pilot							PCP								PMDARPM(1)