GIT – How To a Package Using Without Installing On

Iwould like to only download the packages via yum and not /update them. How do I download a RPM package using yum command under Enterprise Linux server or RHEL systems?

1. You need to install plugin called yum-downloadonly. This plugin adds a –downloadonly flag to yum so that yum will only download the packages and not install/update them. Following options supported by this plugin:

[a] –downloadonly : don’t update, just download a rpm file
[b] –downloaddir=/path/to/dir : specifies an alternate directory to store packages such as /tmp

Please note following instructions are only tested on CentOS server but should work with RHN and RHEL without any problem.

How do I install yum-downloadonly plugin?

Type the following command to install plugin, enter:
# yum install yum-downloadonly
Sample output:

Loading "fastestmirror" plugin
Loading "security" plugin
Loading mirror speeds from cached hostfile
 * base: centos.mirrors.tds.net
 * updates: mirror.myriadnetwork.com
 * addons: mirrors.gigenet.com
 * extras: holmes.umflint.edu
Setting up Install Process
Parsing package install arguments
Resolving Dependencies
--> Running transaction check
---> Package yum-downloadonly.noarch 0:1.1.10-9.el5.centos set to be updated
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
 yum-downloadonly        noarch     1.1.10-9.el5.centos  base              9.0 k
Transaction Summary
=============================================================================
Install      1 Package(s)
Update       0 Package(s)
Remove       0 Package(s)
Total download size: 9.0 k
Is this ok [y/N]: y
Downloading Packages:
(1/1): yum-downloadonly-1 100% |=========================| 9.0 kB    00:00
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing: yum-downloadonly             ######################### [1/1]
Installed: yum-downloadonly.noarch 0:1.1.10-9.el5.centos
Complete!

How do I download a RPM package only from RHN or CentOS mirror, without installing it?

Download package but don’t install/update, enter:
# yum update httpd -y --downloadonly
By default package will by downloaded and stored in /var/cache/yum/ directory. But, you can specifies an alternate directory to store packages such as /opt, enter:
# yum update httpd -y --downloadonly --downloaddir=/opt
Sample output:

yum install httpd -y --downloadonly
Loading "downloadonly" plugin
Loading "fastestmirror" plugin
Loading "security" plugin
Loading mirror speeds from cached hostfile
 * base: centos.mirrors.mypsh.com
 * updates: mirror.steadfast.net
 * addons: mirrors.gigenet.com
 * extras: holmes.umflint.edu
Setting up Install Process
Parsing package install arguments
Resolving Dependencies
--> Running transaction check
---> Package httpd.i386 0:2.2.3-11.el5_1.centos.3 set to be updated
filelists.xml.gz          100% |=========================| 2.8 MB    00:03
filelists.xml.gz          100% |=========================| 681 kB    00:11
filelists.xml.gz          100% |=========================| 122 kB    00:00
filelists.xml.gz          100% |=========================|  150 B    00:00
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
 httpd                   i386       2.2.3-11.el5_1.centos.3  base              1.1 M
Transaction Summary
=============================================================================
Install      1 Package(s)
Update       0 Package(s)
Remove       0 Package(s)
Total download size: 1.1 M
Downloading Packages:
(1/1): httpd-2.2.3-11.el5 100% |=========================| 1.1 MB    00:01
exiting because --downloadonly specified

To see downloaded file, enter:
# ls -l /opt/*.rpm
Sample output:

-rw-r--r-- 1  root 1116426 Jan 17 03:36 /opt/httpd-2.2.3-11.el5_1.centos.3.i386.rpm
-rw-r--r-- 1  root   83452 Oct  2  2007 /opt/lighttpd-fastcgi-1.4.18-1.el5.rf.i386.rpm
-rw-r--r-- 1  root  635045 Oct 20  2007 /opt/psad-2.1-1.i386.rpm

Method # 2: yum-utils.noarch Package

yum-utils is a collection of utilities and examples for the yum package manager. It includes utilities by different authors that make yum easier and more powerful to use. These tools include: debuginfo-install, package-cleanup, repoclosure, repodiff, repo-graph, repomanage, repoquery, repo-rss, reposync, repotrack, verifytree, yum-builddep, yum-complete-transaction, yumdownloader, yum-debug-dump and yum-groups-manager.
# yum -y install yum-utils.noarch
Now use the yumdownloader command which is a program for downloading RPMs from Yum repositories. Type the following command to download httpd rpm file:
# yumdownloader httpd
Sample outputs:

Loaded plugins: rhnplugin
httpd-2.2.3-31.el5_4.2.x86_64.rpm                        | 1.2 MB     00:00

How Do I Extract Downloaded RPM File?

Type the command as follows:
# rpm2cpio httpd-2.2.3-31.el5_4.2.x86_64.rpm | cpio -idmv

2. yum problems: Skip Packages With Broken Dependencies When Upgrading System

Q. I made a mistake and added additional repo under CentOS / RHEL 5.x server. Now when I try to upgrade packages it gives me out broken dependencies / missing dependency error. How do I skip broken packages and apply updates to other installed software’s?

A. packages with broken dependencies is really bad. Yum generally take care of such business, but when you mix additional repos it may give out ‘Missing Dependency’ error under RHEL / CentOS Linux 5.x systems.

You need to add plugin called yum-skip-brokenm which adds a –skip-broken to yum to make it possible to check packages for dependency problems and skip the one with problems.

Install yum-skip-broken

Type the following command as root user:
# yum -y install yum-skip-broken
Sample output:

Loading "fastestmirror" plugin
Loading mirror speeds from cached hostfile
 * base: mirror.steadfast.net
 * updates: mirror.steadfast.net
 * addons: centos-distro.cavecreek.net
 * extras: mirrors.liquidweb.com
Setting up Install Process
Parsing package install arguments
Resolving Dependencies
--> Running transaction check
---> Package yum-skip-broken.noarch 0:1.1.10-9.el5.centos set to be updated
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
 yum-skip-broken         noarch     1.1.10-9.el5.centos  base               11 k
Transaction Summary
=============================================================================
Install      1 Package(s)
Update       0 Package(s)
Remove       0 Package(s)
Total download size: 11 k
Downloading Packages:
(1/1): yum-skip-broken-1. 100% |=========================|  11 kB    00:00
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing: yum-skip-broken              ######################### [1/1]
Installed: yum-skip-broken.noarch 0:1.1.10-9.el5.centos
Complete!

How to handle skiping packages with dependency problems

Now type the command as follows:
# yum -y upgrade --skip-broken
OR
# yum -y update --skip-broken

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