- extra += "See 'schroot -l' for a list of available chroots. Start new sessions\n"
- extra += "with 'schroot --begin-session -c <chroot>', run commands in sessions using\n"
- extra += "\schroot --run-session -c <session> [-- command]\, and tear down sessions\n"
- extra += "using \schroot --end-session -c <session>'. You can run a limited set of\n"
- extra += "privileged commands, for instance some of apt-get, using\n"
- extra += "'dd-schroot-cmd -c <session> <command>'."
+ extra += "For an introduction to the porterbox 'schroot' tool, see:\n"
+ extra += " <URL:http://dsa.debian.org/doc/schroot/>.\n"