Letter: U
- udev-039-10.10.EL4: A userspace implementation of devfs
- unix2dos-2.2-24.1: unix2dos - UNIX to DOS text file format converter
- up2date-4.4.50-4: Determines which system packages need to be updated via RHN.
- up2date-gnome-4.4.50-4: A GUI interface for Update Agent.
- urw-fonts-2.2-6.1: Free versions of the 35 standard PostScript fonts.
- util-linux-2.12a-16.EL4.11: A collection of basic system utilities.