Iron Bars SHell is a restricted Unix shell. The user can not step
out of, nor access, files outside the home directory. Two ASCII
configuration files are used for more control. The system administrator
can define which commands may be executed by the user. No other
executables are allowed. The admin also has the opportunity to define
what kind of files the user may create. If a file has a certain
extension (such as .mp3, .c, etc.), ibsh automatically erases it.
