UNIX for Dummies Questions & Answers

Hi guys

Right now the standard out and standard err are going to nohup.out file
I wanted to route to some other name specific files so that it will be easy to research the logs

Example

I have this line in my script
nohup execute receiptLoaderStart &
which is routing the logs to nohup.out
As most of the scripts are routing the standard err to nohup.out I am having trouble to research the logs
I wanted to route the logs to nohup_sumarylogfile
I have tried to nohup execute receiptLoaderStart & > nohup_sumarylogfile
but some how it's not routing to nohup_sumarylogfile
Can anybody help me out of this

Thanks in advance

How about:
nohup execute receiptLoaderStart > nohup_sumarylogfile 2>&1 &

Thanks

It worked for me

Thanks
Pinky

One more doubt on this one
How can I make datewise backup of log files on nohup_summarylogfile

I wanted everyday to be a new log file appended by the date like

nohup_summarylogfile20080313


Thanks in advance for the help
Pinky

If your job is restarted every day you can use a variable in the logfile name (check the manpage for the format on "date", i have no manpage at hand writing this):

Code:

date="$(date +'%Y%m%d')"
nohup /your/job >logfile.${date} 2>&1 &

If the job runs permanently you will have to create a job which copies the contents of the logfile to another file and then clears the logfile. This job can be run from cron daily. The following is just a sketch:

Code:

#! /bin/ksh

date="$(date +'%Y%m%d')"

if [ -w /the/file/to/trim ] ; then
     cat /the/file/to/trim > /some/path/logfile.${date}
     cat /dev/null > /the/file/to/trim
fi

exit 0

The reason why i do not delete the file but overwrite it with an empty stream ("cat /dev/null") is to preserve the inode number. Some processes do not like having the inode numbers of files they are writing to changed.

I hope this helps.

bakunin

Thanks a lot for the solution it partially worked for me
I appreciate all the help

My script has is
nohup execute receiptLoaderStart > nohup_sumarylogfile 2>&1 &

that means I have nohup_sumarylogfile but I don't see any time stamp inside the file like for every new action I wanted to add time stamp
inside the log file

Can anybody help me

Thanks
Pinky

Well, inside the log file only the application writes. If you want a timestamp there you will have to configure the application (receiptLoaderStart) to write one. If the application cannot do this you can't do it either without changing the application (by reprogramming, ...).

Wht you can do is, depending on the frequency of the logfile being written: write a small shell script that prints only a time stamp and make it a cron job. Have it write every hour a line with the time to the logfile. You will then know which part of the logfile was written in which hour of the day:

Code:

<..... your normal log content .....>
------------[15:00]------------------
<..... your normal log content .....>
<..... your normal log content .....>
------------[16:00]------------------
... etc.

This is not exactly what you want, but at least some approximation. The script would look like:

[code]#! /bin/ksh

print - "------------[$(date +'%H:%M')]----------" >> /path/to/logfile

bakunin