[rrd-users] how to add last update info into graphic?

[Alex van den Bogaerdt]

On Wed, Jun 20, 2007 at 10:18:41AM -0500, John Conner wrote:
> hey guys, I am trying to add last update time info into rrdtool graphic,
> what I did is something like
> 
> #!/bin/bash
> now=`date`
> 
> rrdtool graph blablabla \
> blablabla \
> blablabla \
> COMMENT:"last update\: $now"
> 
> when I ran the scipt, I got the following error,
> 
> ERROR: Garbage ':56:46 CDT 2007' after command:
> COMMENT:last update\: Wed Jun 20 09:56:46 CDT 2007
> 
> I know it was caused by the ":", rrdtool does not like any ":" without "\",
> 
> So any quick solution I can print date info on the graphic? thanks a lot!

Try sed, or awk, or any filter you happen to know.  For instance:

now=`date|sed 's/:/\\:/g'`



You could also tell date how to present its output:

now=`date -u +%Y-%m-%dT%H\\:%M\\:%SZ`

HTH
-- 
Alex van den Bogaerdt
http://www.vandenbogaerdt.nl/rrdtool/