pty (pseudo terminal?) are linux devices defined in some quantity compiling the kernel. If you find this a problem then you do have to recompile the kernel increasing this amount.
They are used when a program needs a device where to write to and read from, but this shoudn't be a real terminal. A real terminal is something like a vt100, a pseudo terminal is, for example, an xterm window. HTH, Giuseppe Will Lowe wrote: > > Can anybody tell me what this means, and how to fix it? > > rivendell[502] [~]> rsh gondolin > rlogind: Out of ptys. > rlogin: connection closed.