I have a problem with cd.. command it not working when written. is there anything i am missing?

HI try it like that

cd ..

with a space between cd and

but usually In msdos me write cd… without spaces. and there is no command like ls, pwd . Where does these command actually work ?

that is the linux command you can read more about it here
https://www.codecademy.com/articles/command-line-commands

It worked. need a space after cd before “…” (you are a life saver).