/usr/bin/update-alternatives

Usage: update-alternatives [<option>...] <command>

Commands:
      --install <link> <name> <path> <priority>
        [--slave <link> <name> <path>]...
          Add a group of alternatives to the system.
      --remove <name> <path>
          Remove <path> from the <name> group alternative.
      --remove-all <name>
          Remove <name> group from the alternatives system.
      --auto <name>
          Switch the master link <name> to automatic mode.
      --display <name>
          Display information about the <name> group.
      --query <name>
          Machine parseable version of --display <name>.
      --list <name>
          Display all targets of the <name> group.
      --get-selections
          List master alternative names and their status.
      --set-selections
          Read alternative status from standard input.
      --config <name>
          Show alternatives for the <name> group and ask the user to select
          which one to use.
      --set <name> <path>
          Set <path> as alternative for <name>.
      --all
          Call --config on all alternatives.

<link> is the symbolic link pointing to /etc/alternatives/<name>.
  (e.g. /usr/bin/pager)
<name> is the master name for this link group.
  (e.g. pager)
<path> is the location of one of the alternative target files.
  (e.g. /usr/bin/less)
<priority> is an integer; options with higher numbers have higher priority in
  automatic mode.

Options:
      --skip-auto
          Skip prompt for alternatives correctly configured in automatic mode
          (relevant for --config only).
      --force
          Allow replacing files with alternative links.
      --quiet
          Enable quiet mode, minimal output.
      --verbose
          Enable verbose mode, more output.
      --debug
          Enable debugging mode, way more output.
      --log <file>
          Change the log file.
      --altdir <directory>
          Change the alternatives directory.
          [default: /etc/alternatives]
      --admindir <directory>
          Change the administrative directory.
          [default: /var/lib/dpkg/alternatives]
          [env: DPKG_ADMINDIR=]
      --instdir <directory>
          Change the installation directory.
          [default: /]
          [env: DPKG_ROOT=]
      --root <directory>
          Change the filesystem root directory.
          [default: /]
      --help
          Show this help message.
      --version
          Show the version.