Yum cheat sheet.

yum-cheat-sheet

`rpm -i some-pacakge.rpm`  This doesn't downlaod or install all dependencies.  Instead that process must be done manually by the user.
`yum install some-package`  Finds the package and it's dependencies, queries meta-data to determine size, then prompts to install y/n.
`/etc/yum.conf` Holds references and values to control yum.  Like cachedir and logfile, etc.
`/etc/yum.repo.d` Holds conf for various repository descriptions.
`yum clean` Cleans out various parts of the locally stored information.
`yum makecache` To create the information i your local database for the enabled repos.
`yum remove some-package` To remove some-package.
`rpm -e some-package` Will also remove some-package.  Errors out if package is required dependency of another installed package.
`rpm -e --test some-package` Will test to see if the package can be removed.
`yum remove some-package` Will walk the dependencies, show which packages will be removed, and prompt y/n.
`yum update 'gr*'` Update based on a regex.

Where are packages located?

`rpm -q some-package` Queries the data for a package.
`yum list some-package` List information about the given package.
`yum list | grep logrhythm` List packages with 'logrhythm' in the output.
`rpm -qi some-package`

`rpm --queryformat` Optionaly build custom query output.
`rpm --querytags` Lists all the query tags supported by your system.

`yum search some-package` Searches mirrors for references to the given package name.
`rpm -ql package` Lists files in a package.  Useful for see what files were layed down on the system.
`rpm -ql` Can also take the flag -c and -d for 'configuration' and 'documentation'.
`rpm -qpl dl-package` Where 'dl-package' is a file, this will provide same information as though it were installed via the -p flag.