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UNIX in a Nutshell: System V Edition

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UNIX Commands
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Exchange typed communication with another user who is on the local machine or on machine hostname . talk might be useful when you're logged in via modem and need something quickly, making it inconvenient to telephone or send e-mail. talk splits your screen into two windows. When connection is established, you type in the top half while user 's typing appears in the bottom half. Type CTRL-L to redraw the screen and CTRL-D (or interrupt) to exit. If user is logged in more than once, use tty to specify the terminal line.

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