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Groff is a document formatting system. Groff takes standard text and formatting commands as input and produces formatted output. The created documents can be shown on a display or printed on a printer. Groff's formatting commands allow you to specify font type and size, bold type, italic type, the number and size of columns on a page, and more. Groff can also be used to format man pages. If you are going to use groff with the X Window System, you will also need to install the groff-x11 package.
The groff-base package contains only necessary parts of groff formatting system which are required to display manual pages, and the groff's default display device (PostScript).
Gxditview displays the groff text processor's output on an X Window System display.
The groff-perl package contains the parts of the groff text processor package that require Perl. These include the afmtodit (font processor for creating PostScript font files), groffer (tool for displaying groff files), grog (utility that can be used to automatically determine groff command-line options), chem (groff preprocessor for producing chemical structure diagrams), mmroff (reference preprocessor) and roff2dvi roff2html roff2pdf roff2ps roff2text roff2x (roff code converters).
GRUB (Grand Unified Boot Loader) is an experimental boot loader capable of booting into most free operating systems - Linux, FreeBSD, NetBSD, GNU Mach, and others as well as most commercial operating systems.
grubby is a command line tool for updating and displaying information about the configuration files for the grub, lilo, elilo (ia64), yaboot (powerpc) and zipl (s390) boot loaders. It is primarily designed to be used from scripts which install new kernels and need to find information about the current boot environment.