Introduction:
Installing, updating and removing installed programs are key responsibilities in a system administrator’s daily life. When a machine is connected to the internet, these task can be easily performed using a package management system such as yum. However, when a machine does not have access to the internet, another method is necessary. Local yum repository is the most effective way to perform any type of package installation without any internet connection.
RPM:
RPM (Red Hat Package Manager) is a default open source and most popular management utility for Red Hat based systems. The tool allows system administrators and users to install, update, uninstall, query, verify and manage system software packages in Linux operating systems. The RPM formerly known as (.rpm) file, that includes compiled software programs and libraries needed by the packages. This utility only works with packages that built on (.rpm) format.
| Go to Package directory [root@asim ~]# cd /run/media/cms/CentOS\ 7\ x86_64/ |
| Install package [root@asim Packages]# rpm -ivh vsftpd-3.0.2-25.el7.x86_64.rpm |
| Upgrade and Install [root@asim Packages]# rpm -U vsftpd-3.0.2-25.el7.x86_64.rpm |
| Upgrade package if already installed [root@asim Packages]# rpm -F vsftpd-3.0.2-25.el7.x86_64.rpm |
| Show all queries [root@asim Packages]# rpm -qa |
| Queries whether package is install or not [root@asim Packages]# rpm -q vsftpd |
| Display information [root@asim Packages]# rpm -qi vsftpd |
| Erase or uninstall [root@asim Packages]# rpm -e vsftpd |
YUM (Yellowdog update Modifier) Server:
YUM stands for Yellowdog Updater Modified. It is an interactive, rpm based package manager. When installing RPM packages most of packages require dependencies but when installing any package with the help of YUM package management tool it helps to install, remove or update the package through the network or local, at the same time it provides an easy method to install a package with its dependent packages.
| List all enabled repositories [root@asim ~]# yum repolist |
| List all packages that are installed [root@asim ~]# yum list |
| List all available packages [root@asim ~]# yum list all |
| Searches the package [root@asim ~]# yum search httpd |
| Display information about a package [root@asim ~]# yum info httpd |
| Installs the specified package [root@asim ~]# yum install httpd |
| Checks whether updates exist for all pack [root@asim ~]# yum check-update |
| Update all packages [root@asim ~]# yum update |
| Remove the specified package [root@asim ~]# yum remove httpd |
| Remove the specified package [root@asim ~]# yum erase httpd |
| Remove all cached package download [root@asim ~]# yum clean all |
| Displays help about yum usage [root@asim ~]# yum help |
| Show you history of all install and remove packages [root@asim ~]# yum history |
Local YUM Repository:
To add a new or update an existing repository, go to the /etc/repos.d directory and create or open a file that end with .repo. Repository sources can be created using the create repo package. The main aim to create such an offline repository it works faster than online repository which can be configured locally.
If you have to install software, security updates and fixes often in multiple systems in your local network, then having a local repository is an efficient way. Because all required packages are downloaded over the fast LAN connection from your local server, so that it will save your internet bandwidth.
Local YUM with DVD configuration
| Create directory for mounting Linux DVD [root@asim ~]#mkdir /dev/cdrom/dev |
| Mount Linux DVD in dvd mounting directory [root@asim ~]#mount /dev/cdrom/dvd |
| Move the existing repo files present in folder [root@asim ~]#mv /etc/yum.repos.d/* .repo / |
| OR Remove the existing repo files [root@asim ~]#rm –rf /etc/yum.repos.d/* |
| Create new repo file call local.repo [root@asim ~]#vim /etc/yum.repos.d/local.repo |
| [LocalRepo] | Name of the section |
| name=Local-Repository | Name of the Repository |
| baseurl=file:///dvd | location of the package |
| enabled=1 | enable repository to work |
| gpgcheck=0 | checking gpg signature set to no |
