varvaruc · November 16, 2013 21:05
diff --git a/gistfile1.txt b/gistfile1.txt

 Yum Tricks and Tips
 Note: These tricks are only available on SLF5 and newer releases. They require yum 3.2.22 or newer.

 yum provides (feature) 
 Is used to find out what package provides some feature. 
 Example: yum provides zip
 yum provides "*/(file)" 
 Is used to find out what package provides a certain file. This is especially useful when you are compiling some code and get an error like "error: libbluetooth.so.2 not found, exiting." 
 Example: yum provides "*/libbluetooth.so.2"
 yum makecache 
 Is used to download and make usable all the metadata for the currently enabled yum repos.
 yum --showduplicates (command) (package) 
 Doesn't limit packages to their latest versions in the info, list and search commands 
 Example: yum --showduplicates list firefox
 yum downgrade 
 Will try and downgrade a package from the version currently installed to the previously highest version (or the specified version). The depsolver will not necessarily work, but if you specify all the packages it should work (and thus. all the simple cases will work). Also this does not work for "installonly" packages, like Kernels. downgrade operates on groups, files, provides and filelists just like the "install" command. 
 Examples: 
 yum downgrade glibc\* 
 yum downgrade firefox-3.6.7-3.el5
 yum reinstall 
 Will reinstall the identically versioned package as is currently installed. 
 Example: yum reinstall yum
 yum-complete-transaction 
 is a program which finds incomplete or aborted yum transactions on a system and attempts to complete them. This program is in the yum-utils package. 
 yum install yum-utils 
 Example: yum-complete-transaction

 Yum Group Tricks
 Note: You will see the following "group name" in these tips. You need to keep the quotes on the name when doing this, because some group names have a space in them. So if the group name was KDE Desktop, you would install it by doing yum install "KDE Desktop"

 yum grouplist 
 Is used to list the available groups from all yum repos. Groups are marked as "installed" if all mandatory packages are installed, or if a group doesn't have any mandatory packages then it is installed if any of the optional or default package are installed.
 yum groupinfo "group name" 
 Is used to give the description and package list of a group
 yum groupinstall "group name" 
 Is used to install all of the individual packages in a group. This works as if you'd taken each of those package names and put them on the command line for a "yum install" command.
 yum groupremove "group name" 
 It is worth pointing out that packages can be in more than one group, so "groupinstall X Y" followed by "groupremove Y" does not do give you the same result as "groupinstall X".
 yum groupupdate "group name" 
 Is just an alias for groupinstall, which will do the right thing because "yum install X" and "yum update X" do the same thing, when X is already installed.

	Yum Tricks and Tips
	Note: These tricks are only available on SLF5 and newer releases. They require yum 3.2.22 or newer.

	yum provides (feature)
	Is used to find out what package provides some feature.
	Example: yum provides zip
	yum provides "*/(file)"
	Is used to find out what package provides a certain file. This is especially useful when you are compiling some code and get an error like "error: libbluetooth.so.2 not found, exiting."
	Example: yum provides "*/libbluetooth.so.2"
	yum makecache
	Is used to download and make usable all the metadata for the currently enabled yum repos.
	yum --showduplicates (command) (package)
	Doesn't limit packages to their latest versions in the info, list and search commands
	Example: yum --showduplicates list firefox
	yum downgrade
	Will try and downgrade a package from the version currently installed to the previously highest version (or the specified version). The depsolver will not necessarily work, but if you specify all the packages it should work (and thus. all the simple cases will work). Also this does not work for "installonly" packages, like Kernels. downgrade operates on groups, files, provides and filelists just like the "install" command.
	Examples:
	yum downgrade glibc\*
	yum downgrade firefox-3.6.7-3.el5
	yum reinstall
	Will reinstall the identically versioned package as is currently installed.
	Example: yum reinstall yum
	yum-complete-transaction
	is a program which finds incomplete or aborted yum transactions on a system and attempts to complete them. This program is in the yum-utils package.
	yum install yum-utils
	Example: yum-complete-transaction

	Yum Group Tricks
	Note: You will see the following "group name" in these tips. You need to keep the quotes on the name when doing this, because some group names have a space in them. So if the group name was KDE Desktop, you would install it by doing yum install "KDE Desktop"

	yum grouplist
	Is used to list the available groups from all yum repos. Groups are marked as "installed" if all mandatory packages are installed, or if a group doesn't have any mandatory packages then it is installed if any of the optional or default package are installed.
	yum groupinfo "group name"
	Is used to give the description and package list of a group
	yum groupinstall "group name"
	Is used to install all of the individual packages in a group. This works as if you'd taken each of those package names and put them on the command line for a "yum install" command.
	yum groupremove "group name"
	It is worth pointing out that packages can be in more than one group, so "groupinstall X Y" followed by "groupremove Y" does not do give you the same result as "groupinstall X".
	yum groupupdate "group name"
	Is just an alias for groupinstall, which will do the right thing because "yum install X" and "yum update X" do the same thing, when X is already installed.