[SOLVED] bash command help needed

HarryBoy · 12-03-2010, 10:57 AM

i am doing the following in a bash script:

Code:

while [ 1 ]
do
    ps -ef | grep myprocessname | wc -l >>myfile
    sleep 1
done

And this is working. But I need to modify it to do the following:
1. Output the date and time beside the count in myfile
2. echo the output to screen.

How can I do this?

colucix · 12-03-2010, 11:03 AM

What about something like this?

Code:

#!/bin/bash
while true
do
    echo "$(date): $(ps -ef | grep myprocessname | wc -l)" | tee -a myfile
    sleep 1
done

The tee command let you send the output both to standard output and to a file. See man tee for details.

HarryBoy · 12-03-2010, 11:24 AM

excellent,

Thanks very much