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 += "'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"