# yum install sshfs Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: reflector.westga.edu * extras: mirror.trouble-free.net * updates: mirror.netdepot.com No package sshfs available. Error: Nothing to do #
When I checked the repository list for the system, I saw the following:
# yum repolist Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirror.atlanticmetro.net * extras: mirror.cc.columbia.edu * updates: mirrors.advancedhosters.com repo id repo name status base/7/x86_64 CentOS-7 - Base 9,007 extras/7/x86_64 CentOS-7 - Extras 375 updates/7/x86_64 CentOS-7 - Updates 2,231 repolist: 11,613 #
When I checked the repositories for another CentOS 7 system where I wasn't encountering the same difficulties with installing packages with yum, I saw the following repositories listed:
$ yum repolist Loaded plugins: fastestmirror, langpacks Determining fastest mirrors * base: mirror.tzulo.com * epel: mirrors.mit.edu * extras: www.gtlib.gatech.edu * updates: mirror.cs.vt.edu repo id repo name status !base/7/x86_64 CentOS-7 - Base 9,007 !epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 10,386 !extras/7/x86_64 CentOS-7 - Extras 356 !updates/7/x86_64 CentOS-7 - Updates 2,070 repolist: 21,819 $
The system where I was able to install the packages I wanted with yum was
using the Extra Packages for Linux (EPEL) repository in addition to the
base, extras, and updates ones. So I also saw an EPEL file in
/etc/yum/repos.d on that system:
$ ls /etc/yum.repos.d CentOS-Base.repo CentOS-Debuginfo.repo CentOS-Sources.repo epel.repo CentOS-CR.repo CentOS-fasttrack.repo CentOS-Vault.repo epel-testing.repo $
But there was no file for it within the same directory on the system where I was having issues installing packages for many of the programs I wanted to have on the system.
# ls /etc/yum.repos.d CentOS-Base.repo CentOS-Debuginfo.repo CentOS-Media.repo CentOS-Vault.repo CentOS-CR.repo CentOS-fasttrack.repo CentOS-Sources.repo
The Extra Packages for Enterprise Linux (EPEL) repository is a "community approved" repository, which is listed on the CentOS wiki under Available Repositories for Linux, which notes that though community repositories are not associated with the CentOS project, that "These repositories are frequently recommended by the community, are usually well maintained, and provide a substantial number of additional packages to CentOS." The wiki also notes:
Extra Packages for Enterprise Linux (EPEL) - (See http://fedoraproject.org/wiki/EPEL) provides rebuilds of Fedora packages for EL5, EL6 and EL7. Packages should not replace base, although there have been issues around point releases in the past. You can install EPEL by running yum install epel-release. The epel-release package is included in the CentOS Extras repository that is enabled by default. Support available on Freenode in #epel, on mailing lists, and its issue tracker.
Fortunately, it is simple to install support for the repository on a
CentOS system; you just need to install the epel-release package
with yum install epel-release.
# yum install epel-release Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirror.cs.pitt.edu * extras: mirror.cc.columbia.edu * updates: mirrors.advancedhosters.com Resolving Dependencies --> Running transaction check ---> Package epel-release.noarch 0:7-6 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: epel-release noarch 7-6 extras 14 k Transaction Summary ================================================================================ Install 1 Package Total download size: 14 k Installed size: 24 k Is this ok [y/d/N]: y Downloading packages: epel-release-7-6.noarch.rpm | 14 kB 00:10 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : epel-release-7-6.noarch 1/1 Verifying : epel-release-7-6.noarch 1/1 Installed: epel-release.noarch 0:7-6 Complete! #
When the package is installed epel.repo and
epel-testing.repo files will be placed in the
/etc/yum.repos.d directory.
The package information for the current release of epel-release is shown below:
# rpm -qi epel-release Name : epel-release Version : 7 Release : 6 Architecture: noarch Install Date: Mon 08 Aug 2016 09:12:51 PM EDT Group : System Environment/Base Size : 24873 License : GPLv2 Signature : RSA/SHA256, Fri 06 May 2016 08:51:55 AM EDT, Key ID 24c6a8a7f4a80eb5 Source RPM : epel-release-7-6.src.rpm Build Date : Thu 31 Mar 2016 12:09:34 AM EDT Build Host : buildhw-12.phx2.fedoraproject.org Relocations : (not relocatable) Packager : Fedora Project Vendor : Fedora Project URL : http://download.fedoraproject.org/pub/epel Summary : Extra Packages for Enterprise Linux repository configuration Description : This package contains the Extra Packages for Enterprise Linux (EPEL) repository GPG key as well as configuration for yum. #
When you are installing a package with yum, you will see the repository the package is coming from listed. E.g.:
# yum install sshfs Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirror.atlanticmetro.net * epel: mirror.symnds.com * extras: mirrors.rit.edu * updates: mirrors.advancedhosters.com Resolving Dependencies --> Running transaction check ---> Package fuse-sshfs.x86_64 0:2.5-1.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: fuse-sshfs x86_64 2.5-1.el7 epel 58 k Transaction Summary ================================================================================ Install 1 Package Total download size: 58 k Installed size: 130 k Is this ok [y/d/N]: