For some strange reason, I changed the root password on my GP2X. I know what it is, but I now want to reset it back to what it was before, i.e. blank, empty, nothing. How do I do that?
try editing /etc/passwd so you have nothing in the password field. I don't know if the gp2x uses shadow passwords, but if it does, it'll probably be a single asterix, otherwise a hash value.
Just removed everything between the first two colons. Actually, there was a file called passwd.OLD in there as well, which was the same file before the root password was changed.