Solved: How Yum works , client as well as repository/serve...

LuckyDudeThakur · ‎06-13-2019

Can anyone please explain how Yum command works , in context to

1) how it fetches variables from .repo file like baseurl, gpgcheck, enabled etc. ?

2) how it resolves the metalink url?

3) How it determines the values of variables like $basearch , $releasever etc.?

Also, how can I setup my own yum repository, for example, a user-created application that I could install on system using Yum command?

Regards,
LuckyDudeThakur
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rajeshlukose · ‎06-14-2019

A yum repository is a collection of RPM packages with metadata that is readable by the yum command line tool. Having a yum repository allows you to perform package install, removal, upgrade, and other operations on individual packages or groups of packages

The Yellowdog Updater, Modified (YUM) is a free and open-source command-line package-management utility for computers running the Linux operating system using the RPM Package Manager.

YUM allows for automatic updates and package and dependency management on RPM-based distributions.

YUM works with software repositories (collections of packages), which can be accessed locallyor over a network connection

yum is the primary tool for getting, installing, deleting, querying, and managing Linux RPM software packages from software repositories, as well as other third-party repositories

For installing a application using yum

yum install application name

For Deleting a application name using yum

yum remove application name

For getting details of a Application

yum info application name

You can have a detail look into creating repo by checking the following link

https://www.slashroot.in/yum-repository-and-package-management-complete-tutorial

View solution in original post

Rob2 · ‎06-13-2019

To create your own yum repo you will need to install the package "createrepo"

Then just make a directory, put some rpm files in it, get into the dir and just type: "createrepo ."

This will make this dir a valid yum repository. If this dir is available through a webserver then you can create a .repo file the following way: baseurl=https://myserver/myrepo

You can also use it as a file repo this way: baseurl=file:///opt/myrepo

If you are going to do this for a company I would also suggest you generate your own gpgkey for custom packages and sign them (you'll need gpg and the package rpm-sign for that).

otherwise specifiy in you .repo file: gpgcheck=0

rajeshlukose · ‎06-14-2019