The parent of a directory is the directory above it.
/home is the parent of
/home/repl is the parent of
You can always give the absolute path of your parent directory to commands like
you will take advantage of the fact that the special path
(two dots with no spaces) means "the directory above the one I'm currently in".
If you are in
cd .. moves you up to
If you use
cd .. once again,
it puts you in
cd .. puts you in the root directory
which is the very top of the filesystem.
(Remember to put a space between
.. - it is a command and a path, not a single four-letter command.)
A single dot on its own,
., always means "the current directory",
ls on its own and
ls . do the same thing,
cd . has no effect
(because it moves you into the directory you're currently in).
One final special path is
~ (the tilde character),
which means "your home directory",
No matter where you are,
ls ~ will always list the contents of your home directory,
cd ~ will always take you home.
/home/repl/seasonal, where does
cd ~/../.take you?