02-15-2010
Quote:
Originally Posted by
rchaitanya
Hi
i am using
tail -f existing log file name | grep exception >> location where to copy
but the content is not copying to the location.
ex:
tail -f logfile | grep exception >> location of file.
You can copy the file to any temp location. you can the use command as "tail -f logfile | grep -i exception >>/tmp/app.err &". Else you the copy the logfile to /tmp location , & you can view the execeptions.if your application is continously throwing the Exception to the logfile, in that case you will not be able to view the exceptions of the last minute .
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LEARN ABOUT OPENDARWIN
logsave
LOGSAVE(8) System Manager's Manual LOGSAVE(8)
NAME
logsave - save the output of a command in a logfile
SYNOPSIS
logsave [ -asv ] logfile cmd_prog [ ... ]
DESCRIPTION
The logsave program will execute cmd_prog with the specified argument(s), and save a copy of its output to logfile. If the containing
directory for logfile does not exist, logsave will accumulate the output in memory until it can be written out. A copy of the output will
also be written to standard output.
If cmd_prog is a single hyphen ('-'), then instead of executing a program, logsave will take its input from standard input and save it in
logfile
logsave is useful for saving the output of initial boot scripts until the /var partition is mounted, so the output can be written to
/var/log.
OPTIONS
-a This option will cause the output to be appended to logfile, instead of replacing its current contents.
-s This option will cause logsave to skip writing to the log file text which is bracketed with a control-A (ASCII 001 or Start of
Header) and control-B (ASCII 002 or Start of Text). This allows progress bar information to be visible to the user on the console,
while not being written to the log file.
-v This option will make logsave to be more verbose in its output to the user.
AUTHOR
Theodore Ts'o (tytso@mit.edu)
SEE ALSO
fsck(8)
E2fsprogs version 1.44.1 March 2018 LOGSAVE(8)