[CentOS] sendmail and rbl blocking - generating statistics

Will McDonald wmcdonald at gmail.com
Wed Mar 14 22:35:48 UTC 2007

On 14/03/07, John Summerfield <debian at herakles.homelinux.org> wrote:
> Ryan Simpkins wrote:
> >
> > Am I using time right to measure it?
> No, you're timing the cat only.

I don't think that's the case, you know. If I run the following:

[wmcdonald at stella ~]$ ls -lh /tmp/messages.1
-rw-r--r--  1 root root 4.3M Mar 14 20:03 /tmp/messages.1
[wmcdonald at stella ~]$ time cat /tmp/messages.1 1> /dev/null

real    0m0.018s
user    0m0.001s
sys     0m0.017s

[wmcdonald at stella ~]$ time cat /tmp/messages.1 | grep  '*.foo' 1> /dev/null

real    0m0.047s
user    0m0.021s
sys     0m0.026s

Running both commands repeatedly shows similar time differences, I
think 'time''s timing the execution time of the whole command.


More information about the CentOS mailing list