YUM is the Linux package manager that is able to fetch the information about the available package, download the package,install,uninstall and update the package. It also help us to update the system when the update is available. YUM is very similar to the rpm command, it is more smarter than rpm because it does the automatic installation of dependent package required by the installation package. YUM can be configured with new,additional or updating the source of the package and package can be installed using trusted repository source only. Trusted repository meant that source repository comes with the verified the gpg keys which can be enabled in the repository configuration file, if the gpg key does not match with the repository key YUM will not install the package.
Configuration:
YUM configuration files can be found on /etc directory. /etc/yum.conf is the main global file, it contains the information of cache directory, log file, debug info,etc…
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
installonly_limit=3
# metadata_expire=90m
# PUT YOUR REPOS HERE OR IN separate files named file.repo
# in /etc/yum.repos.d
where as /etc/yum.conf.d directory contains additional repository source files. If you need to setup any new repository, here you have to start by creating the repo file ending with .repo extension. Here is the small tutorial which help you to setup the yum repository for your local network installation, before creating the repo you need to have the some information about source which contains rpm packages and xml ( RPM index) file.
The typical repo file will look like below.
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
From the above you can you can see [epel] is the unique section name which contains the repository information
1. name=Extra Packages for Enterprise Linux 6 – $basearch – Name of the repository
2. baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch – it is the url where the repository localted, it can be http,ftp or local file ( http:/path/to/repo, ftp://path/to/repo, file:///path/to/rep respectively).
3. enabled – Enable or disable the repository
4. gpgcheck – Enable or Disable the gpg check
5. gpgkey = Location of the gpg key if you have enabled the gpg check option above.
Verification:
gpgcakey =
gpgcheck = True
gpgdir = /var/lib/yum/repos/x86_64/6Server/epel/gpgdir
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
hdrdir = /var/cache/yum/x86_64/6Server/epel/headers
http_caching = all
includepkgs =
********
Installation:
yum install mysql-server
Loaded plugins: product-id, refresh-packagekit, security, subscription-
: manager
Updating certificate-based repositories.
Unable to read consumer identity
Setting up Install Process
Resolving Dependencies
–> Running transaction check
—> Package mysql-server.x86_64 0:5.1.61-4.el6 will be installed
–> Processing Dependency: mysql = 5.1.61-4.el6 for package: mysql-server -5.1.61-4.el6.x86_64
–> Processing Dependency: perl-DBD-MySQL for package: mysql-server-5.1.6 1-4.el6.x86_64
–> Processing Dependency: libmysqlclient_r.so.16(libmysqlclient_16)(64bi t) for package: mysql-server-5.1.61-4.el6.x86_64
–> Processing Dependency: libmysqlclient.so.16(libmysqlclient_16)(64bit) for package: mysql-server-5.1.61-4.el6.x86_64
–> Processing Dependency: libmysqlclient_r.so.16()(64bit) for package: m ysql-server-5.1.61-4.el6.x86_64
–> Processing Dependency: libmysqlclient.so.16()(64bit) for package: mys ql-server-5.1.61-4.el6.x86_64
–> Running transaction check
—> Package mysql.x86_64 0:5.1.61-4.el6 will be installed
—> Package mysql-libs.x86_64 0:5.1.61-4.el6 will be installed
—> Package perl-DBD-MySQL.x86_64 0:4.013-3.el6 will be installed
–> Finished Dependency ResolutionDependencies Resolved
=========================================================================
Package Arch Version Repository Size
=========================================================================
Installing:
mysql-server x86_64 5.1.61-4.el6 rhel 8.6 M
Installing for dependencies:
mysql x86_64 5.1.61-4.el6 rhel 882 k
mysql-libs x86_64 5.1.61-4.el6 rhel 1.2 M
perl-DBD-MySQL x86_64 4.013-3.el6 rhel 134 k
Transaction Summary
=========================================================================
Install 4 Package(s)
Total download size: 11 M
Installed size: 31 M
Is this ok [y/N]: y
Downloading Packages:
————————————————————————-
Total 63 MB/s | 11 MB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : mysql-libs-5.1.61-4.el6.x86_64 1/4
Installing : perl-DBD-MySQL-4.013-3.el6.x86_64 2/4
Installing : mysql-5.1.61-4.el6.x86_64 3/4
Installing : mysql-server-5.1.61-4.el6.x86_64 4/4
Installed products updated.
Verifying : perl-DBD-MySQL-4.013-3.el6.x86_64 1/4
Verifying : mysql-libs-5.1.61-4.el6.x86_64 2/4
Verifying : mysql-server-5.1.61-4.el6.x86_64 3/4
Verifying : mysql-5.1.61-4.el6.x86_64 4/4
Installed:
mysql-server.x86_64 0:5.1.61-4.el6
Dependency Installed:
mysql.x86_64 0:5.1.61-4.el6 mysql-libs.x86_64 0:5.1.61-4.el6 perl-DBD-MySQL.x86_64 0:4.013-3.el6
Complete!
Conclusion:
From the above you could see the MySQL server package’s installed with it’s dependent. Installation as simple as watching movies, just enter the command and watch drama of the installation.
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