2019-03-31 17:05:09 +08:00
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.. _cmd-echo:
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2018-12-17 09:39:33 +08:00
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echo - display a line of text
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2019-01-03 12:10:47 +08:00
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=============================
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2018-12-17 09:39:33 +08:00
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2018-12-18 09:58:24 +08:00
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Synopsis
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--------
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2018-12-17 05:08:41 +08:00
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2019-09-17 17:59:04 +08:00
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::
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2018-12-18 09:58:24 +08:00
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2019-09-17 17:59:04 +08:00
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echo [OPTIONS] [STRING]
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2018-12-17 05:08:41 +08:00
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2018-12-19 10:44:30 +08:00
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Description
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2019-01-03 12:10:47 +08:00
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-----------
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2018-12-17 05:08:41 +08:00
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2018-12-20 04:02:45 +08:00
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``echo`` displays a string of text.
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2018-12-17 05:08:41 +08:00
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The following options are available:
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2018-12-20 04:02:45 +08:00
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- ``-n``, Do not output a newline
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- ``-s``, Do not separate arguments with spaces
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2018-12-17 05:08:41 +08:00
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2018-12-20 04:02:45 +08:00
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- ``-E``, Disable interpretation of backslash escapes (default)
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2018-12-17 05:08:41 +08:00
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2018-12-20 04:02:45 +08:00
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- ``-e``, Enable interpretation of backslash escapes
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2018-12-17 05:08:41 +08:00
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2018-12-19 10:44:30 +08:00
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Escape Sequences
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2019-01-03 12:10:47 +08:00
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----------------
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2018-12-17 05:08:41 +08:00
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If ``-e`` is used, the following sequences are recognized:
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- ``\`` backslash
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- ``\a`` alert (BEL)
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- ``\b`` backspace
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- ``\c`` produce no further output
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2018-12-20 04:02:45 +08:00
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- ``\e`` escape
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- ``\f`` form feed
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- ``\n`` new line
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- ``\r`` carriage return
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- ``\t`` horizontal tab
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- ``\v`` vertical tab
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- ``\0NNN`` byte with octal value NNN (1 to 3 digits)
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- ``\xHH`` byte with hexadecimal value HH (1 to 2 digits)
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2018-12-19 10:44:30 +08:00
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Example
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2019-01-03 12:10:47 +08:00
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-------
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2018-12-17 05:08:41 +08:00
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2018-12-19 11:14:04 +08:00
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::
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echo 'Hello World'
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2018-12-17 05:08:41 +08:00
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Print hello world to stdout
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2018-12-19 11:14:04 +08:00
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::
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echo -e 'Top\\nBottom'
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2018-12-17 05:08:41 +08:00
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Print Top and Bottom on separate lines, using an escape sequence
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