Which files are safe to delete?

[zoomzilla]

I'm trying to keep my system as clean and slimmed down as possible and I was wondering what files I can delete after downloading software.
I've also used up quite a bit of space with all the software packages I've installed and its only logical to assume that these are going to keep adding up. Is there a program I can install that will delete all the outdated plugins and stuff I dont need or use anymore? Any help is appreciated.

[Lakshmipathi]

what your linux distro? If you are using rpm based distro, you could use

rpm -e unwanted_package_name

You can write a little script (find command with size or date) and _review_ and remove those files.

[coopstah13]

new packages will overwrite old files and delete files that aren't needed if you install with yum

there really aren't any files you can safely delete without disrupting your system in some way

you should just run yum clean all command after updating/installing to delete the downloaded installer files, which will save disk space, and if you haven't done this already could be using up a considerable amount