List, good afternoon,
I am using a script to check and update a dynamic IP address in our DNS
records. I have tried to add a date and time output to a log file which
records IP address changes and updates - but the change I inserted is not
working. I think the problem is that I have not understood correctly how to
capture the *text* of the date and time, and then add it to a script 'echo'
output line. May I show the two lines I am using?
I try to capture the date and time into a variable named 'dt':
dt= $(date '+%d/%m/%Y %H:%M:%S');
[please see there is a space between = and $, and between Y and %]
I then try to prepend the date and time text (which i anticipate is now in the
variable 'dt') to a line (the rest of which does work), logging the actual IP
address change and the domain that needed to change.
echo "%dt" "Changed ${DYN_DOMAIN} from ${registeredIp} to ${externalIp}" >>
/var/log/updated-ddns.log
[The registeredIp and externalIp and Dyn_Domain elements are working fine.
This script is based on one provided by our DNS provider, because none of the
packaged ddns scripts fully match the update scheme required by the provider.
The updates are working fine, when needed, and so is the log - but only
recording the nature of the change, not the date/time it changed.]
My problem is only with the dt section. I looked in the doc sections of the
Debian installation and there are some scripting howtos etc, but they're fairly
introductory and I didn't find one that introduced the notion of how to set a
variable with some text, and then use it. This is the first time I've tried to
assign some text, and I would think I'm missing something fundamental. If
anyone would care to comment, I'd be very pleased to understand why the date
assignment, and its output on the logging line, is not working in the way that
I had thought would happen.
Grateful for any comments,
regards, Ron
