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Text-Terminals on Linux

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13.14 Function Keys

These are the keys labeled F1, F2, etc. On older terminals they may be labeled PF1, PF2, etc. where the P stands for Programmable. Some keyboards have both. One may program (redefine) these keys to send out a string of user-defined bytes. They may often be easily "programmed" using a certain set-up menu {FKey}. On some terminals, one may also specify where this string is sent to when the key is pressed. In "normal" mode, pressing the key is just like typing the string at the keyboard. In "local" mode pressing the key sends it to the terminal (just like if the terminal was in local mode). This may be used to send escape sequences to the terminal so as to configure it in a special way. In "remote" mode, the string is always sent out the serial port to the host computer (even if the terminal is in local mode).

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