| Jeff Abrahamson on Wed, 11 Jun 2003 00:02:10 -0400 |
|
On Tue, Jun 10, 2003 at 10:10:01PM -0400, zeek wrote:
> [26 lines, 73 words, 659 characters] Top characters: _entsil\n
>
>
> Greets PLUGgers,
>
> Does anyone know how to ring a system bell, a beep w/o additional software? I've
> tried:
>
> echo -n -e "\a" and echo -n -e "\007"
>
> but neither of these are working --even for systems which ring bells on other
> calls.
>
>
> I want to work this into a BB monitoring alert.
These both work for me:
/bin/echo -n -e "\a"
echo -n -e "\a"
Since echo is also a shell built-in, you have to specify that you want
/bin/echo if you want it.
You can also fiddle with the shell built-in. From the bash man page:
echo [-neE] [arg ...]
Output the args, separated by spaces, followed by a newline. The return
status is always 0. If -n is specified, the trailing newline is sup-
pressed. If the -e option is given, interpretation of the following
backslash-escaped characters is enabled. The -E option disables the
interpretation of these escape characters, even on systems where they
are interpreted by default. The xpg_echo shell option may be used to
dynamically determine whether or not echo expands these escape charac-
ters by default. echo does not interpret -- to mean the end of options.
echo interprets the following escape sequences:
\a alert (bell)
\b backspace
\c suppress trailing newline
\e an escape character
\f form feed
\n new line
\r carriage return
\t horizontal tab
\v vertical tab
\\ backslash
\0nnn the eight-bit character whose value is the octal value nnn (zero
to three octal digits)
\nnn the eight-bit character whose value is the octal value nnn (one
to three octal digits)
\xHH the eight-bit character whose value is the hexadecimal value HH
(one or two hex digits)
--
Jeff
Jeff Abrahamson <http://www.purple.com/jeff/>
GPG fingerprint: 1A1A BA95 D082 A558 A276 63C6 16BF 8C4C 0D1D AE4B
Attachment:
pgp35nPD2gSbZ.pgp
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