NAME
update-alternatives - maintain symbolic links determining default commands
SYNOPSIS
update-alternatives [ ''options''? --install link name path priority [ __--slave__ ''link name'' ''path''?...
update-alternatives [ ''options''? --remove name path
update-alternatives [ ''options''? --auto name
update-alternatives [ ''options''? --display name
update-alternatives [ ''options''? --config name
A more explained link: http://www.wlug.org.nz/update-alternatives(8)