I am within psql and am wondering if there is a way to backup/restore databases from this command shell. I have read of pg_dump, but that fails with \"syntax error at or ne
You can always run shell command directly from psql session using \! [ command ]
syntax, for example:
\! pg_dump -Fc -f D:\postgres.dump -U postgres postgres
Of course it's not so common to execute pg_dump or pg_restore in such way, but it's possible.
Chapter VI. Reference contains list of all SQL commands and applications (both client and server).