Re: way to flush /var/log/message

[Paul Allen Newell <pnewell@xxxxxxxxxx>]

On 5/20/2012 5:20 AM, Mikkel L. Ellertson wrote:
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> On 05/19/2012 11:51 PM, Paul Allen Newell wrote:
> > Hello:
> >
> > Is there a way to flush output to /etc/log/message so a tail -f
> >   catches things when they happen rather than what I think I am
> > seeing as a buffer hold-until-full delay?
> >
> > Thanks in advance, Paul
> What you are seeing is the last last 10 lines of the file, and
> then new additions as it is added to the file. This is the way
> tail -f works. You may want to read the man or info page on tail.
>
> Mikkel
> - -- 
JD: Thanks for the suggestions of things to "man" in your earlier reply

Mikkel: I understand tail. What I am having problems with is expecting 
to see new additions from iptables logging rejections and not getting 
them until much later, if at all? I just wanted to find out if there was 
a need/way to make sure that nothing is "waiting" to be written as 
Idon't know if there is any buffering of output (something like fflush() 
in c++).

Suvayu and Reindl: Thanks for your suggestions.

To all: I am getting the sense from these answers that the assumption is 
that anything that needs to be written to /var/log/messages happens on 
demand and there is no buffering (as in "nobody replied that I need to 
do something to flush").

Paul
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