Obter documentação para builtins de shell pode ser feito usando o comando %código%. Por exemplo:
$ help exec
exec: exec [-cl] [-a name] [command [arguments ...]] [redirection ...]
Replace the shell with the given command.
Execute COMMAND, replacing this shell with the specified program.
ARGUMENTS become the arguments to COMMAND. If COMMAND is not specified,
any redirections take effect in the current shell.
Options:
-a name pass NAME as the zeroth argument to COMMAND
-c execute COMMAND with an empty environment
-l place a dash in the zeroth argument to COMMAND
If the command cannot be executed, a non-interactive shell exits, unless
the shell option 'execfail' is set.
Exit Status:
Returns success unless COMMAND is not found or a redirection error occurs.
Caso contrário, é possível executar help
e, em seguida, pesquisar nesse
(talvez escrevendo man bash
, neste caso, assumindo um
pager).