topic Re: Script output to a log file in Operating System - HP-UX

Script output to a log file

MikeL_4 — Thu, 12 Aug 2004 08:59:56 GMT

I have a script that runs to check some files, etc...

Is there a way to have all output from the script put into a log file ?? now when you run it just scrolls onto the screen..

Thanks

Re: Script output to a log file

Massimo Bianchi — Thu, 12 Aug 2004 09:02:18 GMT

Hi,
redirect the output:

yourscript.sh >/dir/logoutput.log 2>&1

>/dir/logoutput.log : redirects standard output there
2>&1 : redirect standard error

HTH,
Massimo

Re: Script output to a log file

Alzhy — Thu, 12 Aug 2004 09:04:46 GMT

Oh simply:

unixprompt# scriptname.ksh | tee script.log

It'll run your script displaying output while at the same time capturing output to a logfile named script.log.

Re: Script output to a log file

Chris Wilshaw — Thu, 12 Aug 2004 09:08:31 GMT

If you wish to capture any user input as well, you can use the script command;

script /tmp/output.log
exit (to complete script logging when your script is finished).

Re: Script output to a log file

Robert-Jan Goossens — Thu, 12 Aug 2004 09:13:43 GMT

Hi,

It is a bit cryptical :-) but take a look at the script command.

# script output_file
# your_script

Hope this helps,
Robert-Jan

Re: Script output to a log file

Franky_1 — Thu, 12 Aug 2004 09:13:49 GMT

Hi,

easy just redirect the output to your desired logfile

"your_script" > "logfile"

eg

script.sh > /tmp/output.log

Regards

Franky

Re: Script output to a log file

Muthukumar_5 — Thu, 12 Aug 2004 09:51:06 GMT

You can redirect the outputs of a shell script to a log file as,

redirection with redirectors 1> 2>
where 1 - stdout
2 - stderr

Example: ksh test.ksh 1>test.log 2>test.log
or
ksh test.ksh 1>test.log 2>&1

Using script,
script outputfile
ksh test.ksh

exit to stop the script

Using tee command
ksh test.ksh | tee output file

Tee will stop upon exiting from shell script.

You can scroll the log files in parralel as tail -f

And more important;
you can use debugging mode as,
set -x or set -v
on start of script to keep the track of execution of shell sctipts

_muthu_

Re: Script output to a log file

Robert Wells_3 — Tue, 17 Aug 2004 09:25:27 GMT

G'day,

I like using the stderr duplication and then using tee, e.g. for bash, ksh or zsh:

my_script 2>&1 | tee my_script_output

Alternatively, I like creating a 'write to a log file' function within the script and then tailing this log file in another window. This lets me create a nice timestamp and maybe error/warning/info level for the log messages.

I usually make log_detailed and log_summary summary functions. These create two different log files; a detailed log and a summary log. The detailed log file contains all the messages that went into the summary log file along with (funnily enough (-: ) more detailed messages.

I have written vim syntax files to vary the highlighting and colours used based on the error levels. These allow a developer to easily see exceptions and also to distinguish between messages from our middleware and messages from the application that they have written.

Hope this helps.

regards,
Rob

Re: Script output to a log file

Rick Garland — Tue, 17 Aug 2004 11:07:10 GMT

The "tee -a" option can be very useful for capturing output.

When you invoke your script, pipe to tee -a as well.

Define your $LOG_FILE and then pipe the command to tee -a $LOG_FILE