lshell is a shell coded in Python, that lets you restrict a user's environment to limited sets of commands, choose to enable/disable any command over SSH (e.g. SCP, SFTP, rsync, etc.), log user's commands, implement timing restriction, and more.
Provides steganographic cloaking for scripts and other data by interspersing sensitive lines with ANSI codes to clear themselves after drawing on a terminal. Front data, commented-out, is displayed instead.