The program loadunimap loads the specified map in the kernel unicode-to-font mapping table. If no map is given def is assumed. The default extension (that can be omitted) is .uni.
If the -o oldmap option is given, the old map is saved in the file specified.
On Linux 2.6.1 and later one can specify the console device using the -C option.
Usually one does not call loadunimap directly - its function is also built into setfont.