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Unknown Terminal Type

This error comes up when there’s something wrong with the terminal emulation type. There are two places to check:

  1. The “Telnet terminal type” or “netterm” setting in TERM or TinyTERM. (This only needs to be checked on network connections.) If it’s not set to a valid terminal type for the host system, it needs to be changed. If it’s blank, you may need to enter something, such as “vt220” when you’re using VT220-7 emulation.
  2. The TERM environment variable on the host system. This will usually be stored in your .profile or equivalent. Like the telnet terminal type, this must be set to a valid emulation for the host system.

Some systems will request a terminal type when you login. You can usually hit Enter to accept the default; however, if it’s incorrect or listed as unknown, you will need to type an appropriate value.

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