eval
NAME
eval - The args are read and concatenated together into a single commandSYNOPSIS
eval [arg ...]
DESCRIPTION
The args are read and concatenated together into a single command. This command is then read and executed by the shell, and its exit status is returned as the value of eval. If there are no args, or only null arguments, eval returns 0.
SEE ALSO
This is extracted from the main bash man page, see there for more details.