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Full Discussion: $var -ne ${var} why?
Top Forums Shell Programming and Scripting $var -ne ${var} why? Post 32369 by Perderabo on Friday 22nd of November 2002 05:39:40 PM
Old 11-22-2002
In a case like:
letter=A
title="${letter}system"

We want to create a variable called title which has the value "Asystem". But without the braces the shell will think we have a variable called "lettersystem".
 

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MOTD.TAIL(5)						   Debian Administrator's Manual					      MOTD.TAIL(5)

NAME
motd.tail - Template for building the system message of the day DESCRIPTION
On Debian systems, the system message of the day is rebuilt at each startup, in order to display an accurate information. /etc/motd.tail is the file to edit permanent changes to the message of the day. OVERVIEW
The initiation script /etc/init.d/bootmisc.sh prepends a line containing information about the system to /etc/motd.tail and stores the resulting file in /var/run/motd. /etc/motd is a symbolic link to /var/run/motd. This is done to prevent changes to /etc as the system can not assume /etc to be writable. Changes to /etc/motd effectively end up in a file under /var/run which will be regenerated upon reboot. A symbolic link to a different file, such as /etc/motd.static disables this behaviour. FILES
/etc/init.d/bootmisc.sh The initiation script which builds /var/run/motd /etc/motd Symbolic link to the system message of the day at /var/run/motd /etc/motd.tail Template for building the system message of the day /var/run/motd System message of the day file rebuilt at each computer start SEE ALSO
login(1), issue(5), motd(5). Debian 2007-04-28 MOTD.TAIL(5)
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