Help-(Total Newbie) Dependency Problems
 

I am trying to install Mplayer on my three day new system. I think I have figured out how to install RPM's. I tried to compile MPlayer from source but I got a bunch of error messages, so now I am trying from RPM's. When I type in "rpm -Uvh mplayer-0.90-18.i386.rpm" I get a list of dependencies. So I try installing them by downloading RPM's and using rpm -Uvh but then on everyone I get the following messages:
warning: user dude does not exist - using root
warning: group dude does not exist - using root
And sometimes i get:
V3 DSA signature: NOKEY, key ID e42d547b

Could somebody please explain what these error messages mean and how I can fix them??

Those are warning messages and not errors. Errors would cause it not to install. Those packages were probably built by someone besides Red Hat, so read everything on the download site for complete information on that package.

# Guides to software management
LNAG - How do I install a program I downloaded from the Internet?
Rute Guide's software explanation
You might want to check out CheckInstall to manage source code installations/uninstallation

# Red Hat links
Red Hat Linux Manuals
Get your mp3 support here
Maximum RPM
rpmfind
Easier software management: apt4rpm - Red Carpet
Red Hat 8.0 Tips & Tricks

# Red Hat 7.3 down configuration commands
setup leads to several configuration tools

# Red Hat 7.3 up configuration commands
Configure soundcard:
redhat-config-soundcard
Configure X server:
redhat-config-xfree86
Configure network:
redhat-config-network
Manage software:
redhat-config-packages
Red Hat 9.0 Package Management Tool

# Handling NTFS
New Technology FileSystem (NTFS) HOWTOs
Linux NTFS project