At 19:35 -0500 23.2.1997, Jonathan Lyons wrote:
>Why, when I try to make a directory, do I get the following message:
>
>mkdir testdir: Read-only filesystem

Are you doing this in single-user mode? In single-user mode the root file
system is indeed mounted read only. You can either remount it read/write
(look at the manpage mount(1) for details) or leave single-user mode (with
"exit" or ^D) to multi-user mode, where the file system(s) are (usually)
mounted read/write.

Greetings, Juergen.