echo - echo arguments
echo [ -n ] [ arg ] ...
echo writes its arguments separated by blanks and terminated by a newline
(except when "-n" is specified, see below) on the standard output.
It also understands C-like escape conventions; beware of conflicts with
the shell's use of \:
\c print line without new-line
\r carriage return
\v vertical tab
\0n where n is the 8-bit character whose ASCII code is the 1-, 2-
or 3-digit octal number representing that character.
echo has two operating modes. By default, echo operates compatibly with
certain earlier versions of System V echo. If the environment variable
_XPG is defined, and has a numeric value greater than 0, echo operates in
conformance with the X/Open XPG4 specifications. In this mode, when -n is
specified, it is treated as a string, like any other arguments. In the
backward compatibility mode, when -n is specified, it means "no newline".
The arguments will not be terminated by a new-line on the standard
echo is useful for producing diagnostics in command files and for sending
known data into a pipe.
When representing an 8-bit character by using the escape convention \0n,
the n must always be preceded by the digit zero (0).
For example, typing: echo 'WARNING:\07' will print the phrase WARNING:
and sound the ``bell'' on your terminal. The use of single (or double)
quotes (or two backslashes) is required to protect the ``\'' that
precedes the ``07''.
For the octal equivalents of each character, see ascii(5).
echo is often a builtin to the shells, see the shell man pages for
feature specific to each shell. This man page documents the executable
program, not the builtin versions, although they are similar.
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