echo
with option-n
.
cd
with only a relative or absolute path.
pwd
(no flags).
export
(no flags).
unset
(no flags).
env
(no flags or arguments).
exit
(no flags).
<
redirect input.>
redirect output.<<
heredoc.>>
redirect output in append mode.
- ctrl-C displays a new prompt on a new line. ◦ ctrl-D exits the shell.
- ctrl-\ does nothing.