SEO

#1 (**permalink**) 01-12-2008, 05:52 AM

OS: SOlaris 8

I am monitoring my system to periodically check network performance
(e.g. DNS lookup) using a script like this:

while true;
do
echo $(date) >> $OUTPUT_FILE
time nslookup www.sun.com | grep real >> $OUTPUT_FILE
sleep 30
done

but the grep and the output redirections does not seem to work? Any
suggestion (I am not very familiar with the 'time' command).

#2 (**permalink**) 01-12-2008, 05:52 AM

In article <799fe45f.0311130821.2810930e@posting.google.com >,
demone33@yahoo.it (Sara) writes:
> OS: SOlaris 8
>
> I am monitoring my system to periodically check network performance
> (e.g. DNS lookup) using a script like this:
> while true;
> do
> echo $(date) >> $OUTPUT_FILE
> time nslookup www.sun.com | grep real >> $OUTPUT_FILE
> sleep 30
> done
> but the grep and the output redirections does not seem to work? Any
> suggestion (I am not very familiar with the 'time' command).

Then read the man page on time.
Note:
-p Writes the timing output to standard error in the following format:
^^^^^^^^^^^^^^

Also your shell may override "time" with its own builtin version..

Try: /usr/bin/time -p nslookup www.sun.com 2>&1 etc.

#3 (**permalink**) 01-12-2008, 05:52 AM

Sara wrote:
> OS: SOlaris 8
>
> I am monitoring my system to periodically check network performance
> (e.g. DNS lookup) using a script like this:
>
> while true;
> do
> echo $(date) >> $OUTPUT_FILE
> time nslookup www.sun.com | grep real >> $OUTPUT_FILE
> sleep 30
> done
>
> but the grep and the output redirections does not seem to work? Any
> suggestion (I am not very familiar with the 'time' command).

For Bourne;

( time nslookup www.sun.com ) 2>&1 | grep real

HTH
Gary

#4 (**permalink**) 01-12-2008, 05:52 AM

gerryt@gtconnect.net wrote:
> Then read the man page on time.
> Note:
> -p Writes the timing output to standard error in the following format:
> ^^^^^^^^^^^^^^
>
> Also your shell may override "time" with its own builtin version..
>
> Try: /usr/bin/time -p nslookup www.sun.com 2>&1 etc.

Or even better, use ptime which uses microstate accounting so gives a
far more accurate result.

Scott

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

SEO

time command usage