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Appending process output into a file

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# 1  
Old 01-12-2010
Appending process output into a file
Hello Friends,

I'm trying to save process status of root user sorting by CPU usage. However i couldnt save the continuous, standard outputs into a file. Do you have any idea to do it?

Code:
prstat -u root -a -s cpu | sed -e '/^$/d;/sleep/d;/Total/d' >> stat.txt

>ls -l stat.txt
-rw-r--r-- 1 root root 0 Jan 12 17:25 stat.txt

But when i dont append the above code the result is like this:

Code:
   PID USERNAME  SIZE   RSS STATE  PRI NICE      TIME  CPU PROCESS/NLWP       
 20249 root     5416K 3368K cpu7    58    0   0:00:00 0.0% prstat/1
 NPROC USERNAME  SWAP   RSS MEMORY      TIME  CPU                             
    30 root       56M   72M   0.9%   2:58:22 0.0%
   PID USERNAME  SIZE   RSS STATE  PRI NICE      TIME  CPU PROCESS/NLWP       
 20249 root     5680K 3608K cpu9    59    0   0:00:00 0.1% prstat/1
 NPROC USERNAME  SWAP   RSS MEMORY      TIME  CPU                             
    30 root       56M   72M   0.9%   2:58:22 0.1%

Thanks in advance
# 2  
Old 01-12-2010
Hi EAGL€

All I did was add an interval, and a count, and it works OK:

Code:
# prstat -u root -a -s cpu 0 1 | sed -e '/^$/d;/sleep/d;/Total/d' >> stat.txt

# ll stat.txt
-rw-r--r--   1 root     root         341 Jan 12 16:49 stat.txt

# cat stat.txt
   PID USERNAME  SIZE   RSS STATE  PRI NICE      TIME  CPU PROCESS/NLWP
 14756 root     2176K 1440K cpu0    49    0   0:00:00 0.2% prstat/1
 14708 root     1832K 1296K run     39    0   0:00:00 0.1% ksh/1
 NPROC USERNAME  SWAP   RSS MEMORY      TIME  CPU
    28 root       43M   48M   4.7%   0:57:15 0.3%

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