trim large log file

[Asif_8]

Hi!

How to trim large log file.
6935040073 Aug 22 10:09 wls_production.log
thanks

[whiteknight]

Asif,

You can do

# > wls_production.log

this will nullify the log.

WK

[Robert-Jan Goossens]

Hi,

Trim as in clear it?

# cp /dev/null wls_production.log

You could also save the last portion of the file to a backup file.

# tail -10000 wls_production.log > wls_production.log.1

and then empty the file.

Regards,
Robert-Jan

[AwadheshPandey]

better to store trimed file to some where else rather than same place.
cp wls_production.log /newdir/wls_production.log
> wls_production.log

Regards,

[Asif_8]

I can not null the file

>wls_production.log

[Asif_8]

this is also not working
cp /dev/null wls_production.log

[Dennis Handly]

>I can not null the file
>wls_production.log

What do you mean? Don't want to? Or something prevents you?

>this is also not working
cp /dev/null wls_production.log

How? This isn't the best way to do it. Using ">" is the proper way.

If the file is open and being actively written, it probably won't help.

[Asif_8]

this weblogic production server log
this file is open and being actively written,

I tried

>wls_production.log
/dev/null >wls_production.log
vi
ex

[Robert-Jan Goossens]

Asif,

I don't know what version of weblogic you are running, but you can set up log rotation. Have a look at this doc.

http://e-docs.bea.com/wls/docs81/ConsoleHelp/logging.html#1047443

Regards,
Robert-Jan

Ps.
Dennis "This isn't the best way to do it" Well then you will need to rewrite a lot of documentation :-) example emr_na-c01025048-1

[Dennis Handly]

>this weblogic production server log. this file is open and being actively written,

As there a way to send a signal to it to restart the log? I.e. kill -HUP?

[Asif_8]

Hi Goossens !
Thanks, I am using weblogic 8.1 please let me know to set up log rotation

Hi Dennis Handly!Thanks
how send a signal to it to restart the this log

[Dennis Handly]

>Robert-Jan: Well then you will need to rewrite a lot of documentation :-) emr_na-c01025048-1

I can't see that. Is there a kmine number in it?
Perhaps the document was written that way as a kindness to users of scummy C shell?

Using ">" doesn't require creating another process. Using cp or cat does.

>how send a signal to it to restart the this log

I don't know if weblogic supports this convention. You should read the documentation. But if you know the PID:
# kill -HUP PID

[Geoff Wild]

Are you running

> wls_production.log

as root?

Rgds...Geoff

[DCE]

have you tried:

cat /dev/null > wls_production.log

be sure to fully qualify the path to wls_production.log

[UVK]

Hi Asif,

you may have to see if this file is being held by any process
#fuser -fu wls_production.log

Ensure that no users are holding this file becoz doing a trim while a file is use may create a open file.

If no user us holding the file
Go to the directory of the log do a
#cat /dev/null > wls_production.log

This should work

Try ur luck :)

Cheers
Vijay

[Court Campbell]

# perl -e 'truncate("./wls_production.log",0)'