08-13-2008
Be aware that the users will still be allowed on world writable directories (such as /tmp). Otherwise, you will got to stick with mcnamara's opinion on chroot(). Still, I must say chroot() is awfully easy to bypass without the proper kernel limitations (grsecurity).
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CHROOT(1) User Commands CHROOT(1)
NAME
chroot - run command or interactive shell with special root directory
SYNOPSIS
chroot NEWROOT [COMMAND [ARG]...]
chroot OPTION
DESCRIPTION
Run COMMAND with root directory set to NEWROOT.
--help display this help and exit
--version
output version information and exit
If no command is given, run ``${SHELL} -i'' (default: /bin/sh).
AUTHOR
Written by Roland McGrath.
REPORTING BUGS
Report chroot bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
COPYRIGHT
Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
chroot(2)
The full documentation for chroot is maintained as a Texinfo manual. If the info and chroot programs are properly installed at your site,
the command
info coreutils 'chroot invocation'
should give you access to the complete manual.
GNU coreutils 7.1 July 2010 CHROOT(1)