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yum

Also, see the yum command chetsheat.

Check information about a package

If the package is not installed, this will display information about the latest available version of the package:

# syntax: yum info <package_name>[-<version_number>][-<build_number>]
$ yum info httpd
Loading mirror speeds from cached hostfile
 * base: mirrors.sonic.net
 * extras: mirrors.tummy.com
 * updates: linux.mirrors.es.net
Available Packages
Name        : httpd
Arch        : x86_64
Version     : 2.4.6
Release     : 80.el7.centos
Size        : 2.7 M
Repo        : base/7/x86_64
Summary     : Apache HTTP Server
URL         : http://httpd.apache.org/
License     : ASL 2.0
Description : The Apache HTTP Server is a powerful, efficient, and extensible
            : web server.

If the version of the installed package is lower than the latest available version, it will show information about the installed version and the latest available version of the package:

Installed Packages
Name        : influxdb
Arch        : x86_64
Version     : 1.4.2
Release     : 1
Size        : 63 M
Repo        : installed
From repo   : influxdb
Summary     : Distributed time-series database.
URL         : https://influxdata.com
License     : Proprietary
Description : Distributed time-series database.

Available Packages
Name        : influxdb
Arch        : x86_64
Version     : 1.5.2
Release     : 1
Size        : 21 M
Repo        : influxdb/7/x86_64
Summary     : Distributed time-series database.
URL         : https://influxdata.com
License     : Proprietary
Description : Distributed time-series database.

If the installed version is the latest available in the repo, you will only see information about the installed packages.

List versions of the package available in the repo

# syntax: yum list --shoduplicates <package_name>
$ yum list --showduplicates influxdb
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.sonic.net
 * epel: mirrors.kernel.org
 * extras: mirrors.tummy.com
 * updates: linux.mirrors.es.net
Available Packages

...
influxdb.x86_64       1.3.5-1       influxdb
influxdb.x86_64       1.3.7-1       influxdb
influxdb.x86_64       1.4.2-1       influxdb
influxdb.x86_64       1.5.0-1       influxdb
influxdb.x86_64       1.5.1-1       influxdb
influxdb.x86_64       1.5.2-1       influxdb

where the columns of the output have the following format:

  • the first column: <package_name>.<architecture>
  • the second column: <version_number>–<build_number>
  • the third column shows the name of the repository in which the package is available.

Install a package

To install the latest version of the package simple pass its name to the install command:

$ yum install influxdb

To install a specific version of the package, specify its name and the version number separated by a dash (-). In addition to that, you can also specify a build number if multple builds are available for the same version:

# syntax: yum install <package name>[-<version_number>][-<build_number>]
$ yum install influxdb-1.4.2

Install an RPM package located locally

If no pa

# syntax: yum localinstall <path-to-rpm-package>
$ yum localinstall pkg-1-1.i686.rpm

Check if a package is installed

# syntax: yum list installed <package_name>
$ yum list installed influxdb
Installed Packages
influxdb.x86_64              1.4.2-1           @influxdb

This shows the version of the installed package and the name (influxdb) of the repository from which the package was installed.

Also, see yum info

Update packages

Update a package to the latest version:

# syntax: yum update <package_name(s)>
$ yum update influxdb

Sometimes when updating packages you might get an error like this:

$ yum update influxdb
...
No Packages marked for Update

In this case, try to clear/invalidate the cache before trying an update:

$ yum clean expire-cache
$ yum update influxdb

To update a package to specific version, specify the version number (and optionally the build number).

$ yum update-to influxdb-1.5.1

If no package name(s) is specified, yum will update all the packages:

$ yum update

Downgrade a package version

To downgrade to the previous version:

$ yum downgrade influxdb

To downgrade to a specific earlier version:

$ yum downgrade influxdb-1.3.5

Resources used to create this document: