Let the Sunshine In: Software support engineer in Tokyo

After reading Bernd's nice tip, I now remember one of our colleague posting question to internal support engineer alias:

  "How can I add timestamp to each line in nohup.out ?"

I didn't ask why the customer wanted to that. I thought customer was seeing intermittent output from JRE without any time&date info and they wanted to correspond those to real log files.

Anyway, now I know how to do it.

bash-3.00$ date
Fri Jan 11 00:38:52 JST 2008
bash-3.00$ nohup sh -c "iostat 5 2>&1 | nawk '{\"date \\\"+%m/%d/%Y %H:%M:%S\\\":\"|getline date;
close(\"date \\\"+%m/%d/%Y %H:%M:%S\\\":\");
printf (\"%s %s\n\", date, \$0)}'" &
[2] 30111
bash-3.00$ Sending output to nohup.out

bash-3.00$ tail -f nohup.out
01/11/2008 00:38:56:    tty        md0           md1           md2           md3  cpu
01/11/2008 00:38:56:  tin tout kps tps serv  kps tps serv  kps tps serv  kps tps serv   us sy wt id
01/11/2008 00:38:56:    1  124   7   1   18    1   0   31    0   0    6   17   0  178    4  3  0 93
01/11/2008 00:39:01:    0    3   0   0    0    0   0    0    0   0    0    0   0    0    3  3  0 94
01/11/2008 00:39:06:    4  187   0   0    0    0   0    0    0   0    0    0   0    0    4  3  0 93
01/11/2008 00:39:11:    0   20   0   0   11    0   0    0    0   0    0    0   0    0    4  4  0 92
01/11/2008 00:39:16:    0   20   0   0   12    0   0    0    0   0    0    0   0    0    5  3  0 92

This may not work in non bash or for lot of other commands.