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In computing, echo is a command that outputs the strings that are passed to it as arguments. ... Plan 9 Programmer's Manual, Volume 1 Inferno ...
echo: Shell programming Mandatory Write arguments to standard output Version 2 AT&T UNIX ed: Text processing Mandatory The standard text editor PDP-7 UNIX env: Misc Mandatory Set the environment for command invocation System III ex: Text processing Optional (UP) Text editor 1BSD expand: Text processing Mandatory Convert tabs to spaces 3BSD expr
Wikipedia:User page design guide/Style; Wikipedia:Extended image syntax: advanced visual file markup. Help:A quick guide to templates: an introduction to templates. Help:Substitution: substitution is an alternative way of including templates than transclusion. Help:Score: how to render musical scores.
(Hence the name, ECHO) Usually, this means directly to the screen, but the output of echo can be redirected, like any other command, to files or devices. Often used in batch files to print text out to the user. Another important use of the echo command is to toggle echoing of commands on and off in batch files.
existing instructions extended to a 64 bit operand size (remaining instructions) Most instructions with a 64 bit operand size encode this using a REX.W prefix; in the absence of the REX.W prefix, the corresponding instruction with 32 bit operand size is encoded. This mechanism also applies to most other instructions with 32 bit operand size.
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replica/changes, replica/pull, replica/push, replica/scan – client–server replica management; ssh, sshnet, scp, aux/sshserve – secure login and file copy from/to Unix or Plan 9; tel, iwhois – look in phone book; vncs, vncv – remote frame buffer server and viewer for Virtual Network Computing (VNC)
(User A may not see his own typed characters — depending on the terminal software's local echo setting). The person at computer B issues the modem escape command. (Alternately, and more commonly, the computer B could drop the DTR, or Data Terminal Ready signal, to achieve a hangup, without needing to use +++ or ATH.)