RPM ON Centos

What is a RPM on Centos ?
What the purpose of executing the following ? Does it install the applicatin ?
1. rpm -ivh xxxxx.rpm
2. yum update

How can I actually install the application

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RPM is Redhat Package Manager

1.  That installs xxxxx.rpm with verbose messages

2.  YUM = Yellowdog Updater Modified
    yum update  will update every currently installed rpm package
AXISHKAuthor Commented:
Does it mean only the package information (not the application) is updated ? I need to issue another command to install the application.
Manfred BertlManagerCommented:
'yum update' updates all installed packages including its dependencies, also installs new packages when needed in dependencies.
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David FavorLinux/LXD/WordPress/Hosting SavantCommented:
The rpm system is a low level package manager, to install/manipulate local packages only.

The yum system wraps rpm + adds network based facilities.
Seth SimmonsSr. Systems AdministratorCommented:
rpm -ivh xxxxx.rpm

installs (i), with verbosity (v) the package and shows hash (h)

yum update

will update all packages that are marked for update in the configured repositories
AXISHKAuthor Commented:
What the difference between yum install xxxx and rpm -ivh  xxxxx   ?  Is the application installed only when I issue "yum install" ?

rpm -ivh xxxx only install the one package.  If it requires other dependencies, it will complain.  You'll have to find the other packages and manually install those.

yum install xxx will install the package and dependencies.

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