\section exec exec - execute command in current process
\subsection exec-synopsis Synopsis
exec COMMAND [OPTIONS...]
\subsection exec-description Description
The \c exec builtin is used to replace the currently running shells
process image with a new command. On successful completion, exec never
returns. exec can not be used inside a pipeline.
\subsection exec-example Example
exec emacs starts up the emacs text editor. When emacs exits,
the session will terminate.