Package Management in Linux

Redhat Package Manager

Package Syntax:    package_name -version- release. arch      .rpm
                             postfix-             2.6.6-2.  el6.      x86_64 .rpm
rpm -e Removes a given package name
       -i Installs a given package
       -h Shows hash progress when installing
       -U Upgrades a given package
       -v Provides verbose output

Query Options (with -q):
-c Lists all config files
-d Lists all documentation files
-i Displays information about the package
-l Lists the files in a package

If u want install package without removing
# rpm -ivh --replacepkgs nano-2.2.6-1.x86_64.rpm

Query the information from the nano package:
# rpm -qi nano

Find out where the /etc/rsyslog.conf file came from by doing the following:
# rpm -qf /etc/rsyslog.conf
rsyslog-4.6.2-2.el6.x86_64

Use the -c option to find all config files:
# rpm -qc rsyslog
/etc/logrotate.d/syslog
/etc/rsyslog.conf
/etc/sysconfig/rsyslog
You can use the -R option to find out whether a package has any dependencies:
# rpm -qR rsyslog
==============================================================
Yellowdog Update Modifier (YUM)
==============================================================
The yum command has access to repositories where tons of packages are kept and can install, upgrade, or remove them for you automatically. Yum also takes care of resolving and installing any dependencies for
you, which the rpm command can’t do, following are basic commands for yum management.

clean           Removes cached data
erase           Removes a package from the system
grouplist      Displays available package groups
groupinstall  Installs the packages within a group
info             Displays information about a package
install          Installs a package on the system
search        Enables you to search for a package
update       Updates a package

You can use the grouplist command to get a listing of all available “groups”:
# yum grouplist
# yum groupinstall Emacs
# yum groupinstall “Development Tools”