yum

Installing and maintaining repository based software in RHEL family of distributions is handled by YUM. Repository preferences are configured in /etc/yum.repos.d/ directory and by the /etc/yum.conf configuration file. The .rpm files are usually compressed with rpm2cpio tool. To “unpack” the package use following command: (-i to restore archive, -d to create leading directories)

# rpm2cpio package-3.2.1-X10-x86_64.rpm | cpio -id

Install packages

Install package and all required dependencies

# yum install nginx

Install group of packages related to mysql

# yum groupinstall ‘MySQL Database’

Install this package from this repository

# yum --enablerepo=epel install nginx

Download package, without installing it (–resolve adds dependencies to the download)

# yumdownloader --resolve nginx

Remove packages

Remove package and all dependencies

# yum remove nginx

Remove this package bundle

# yum groupremove ‘MySQL Database’

Remove all cached files

# yum clean all

Upgrade packages

See packages that can be updated

# yum check-update

Update the system (installs latest patches and security fixes)

# yum update

Update package and all dependencies to its latest stable version

# yum update firefox

Update all packages in this package group

# yum groupupdate ‘MySQL Database’

Query packages

Display information about installed packages

# yum list | less

Search for the specific package in repositories

# yum list openssh

List all installed packages

# yum list installed | less

Search all available packages in repositories, by name

# yum search openssh

Get information about package before installing it

# yum info firefox

Find which package this file belongs to

# yum provides /etc/httpd/conf/httpd.conf

List all available bundles of packages

# yum grouplist

List all repositories system uses

# yum repolist

List enabled and disabled yum repositories system is using

# yum repolist all

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