Mailinglist Archive: opensuse (2430 mails)

[David Haller <opensuse@xxxxxxxxxx>]

Hello,

On Sat, 19 Apr 2008, David C. Rankin wrote:
>       I had to parse a file to find the max cputemp and I wanted to do it 
>       from the command line. There were several thousand lines of .25 sec 
> cputemp 
> data captured while mprime was running. The file format and the command 
> line I came up with are:
>
> input:
>
> 04:18 trinity~/linux/scripts> tail cputemp.log
> 20080419 02:32   65.0 C
> 20080419 02:32   65.0 C
> <snipped>
>
> command line and output:
>
> 04:17 trinity~/linux/scripts> tmax=0; while read a b t c; do t=$(echo "$t" 
> | sed -e 's/\.//'); if (( $t > $tmax )); then tmax="$t"; fi; done < 
> ./cputemp.log ; tmax=$(echo "$tmax" | sed -e 
> 's/\([0-9][0-9]\)\([0-9]\)/\1\.\2/'); echo "Max temp is: $tmax"
>
> Max temp is: 69.5

Easy: awk and perl were created for this kind of stuff.

awk '$3 > tmax { tmax = $3; }
   END { printf "Maximum temperature was: %.1f °C\n", tmax;
   }' cputemp.log

More elaborate with the following input:

====
20080419 02:32   63.3 C
20080419 02:34   64.1 C
20080419 02:36   63.9 C
20080419 02:39   65.3 C
20080419 02:42   64.2 C
20080419 02:49   65.32 C
20080419 02:53   65.3 C
20080419 03:02   64.2 C
====

$ awk '
   $3 > tmax {
     tmax = $3;
     tdate = $1;
     ttime = $2;
   }
   END {
      printf "Maximum temperature was: %.1f °C on %s %s\n",
      tmax, tdate, ttime;
   }' cputemp.log
Maximum temperature was: 65.3 °C on 20080419 02:49

HTH,
-dnh

-- 
> Mine had one where I think 4 machines were so intertwined that none
> would boot unless 2 of the others were up. And nothing else would boot
> till those were up.
You are trapped in a maze of twisty little NFS-maps, all different.
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