Have written a script to monitor linux non standard log file based on line numbers, so each check store $otalinenum ..
then in next check after 10 minutes it compre the current_total_line_num > last_total_line_num then it will parse the log file from last_total_line_num to current_total_line_num with sed as below
But here am facing problem if someone truncate the log file or delete some lines from them .. insted normal log rotation then my script parse the entire log file ((with else above)) insted from new updates ..
Please help me with logic to avoid old log alerts when file truncate happen ...
## After truncate
--Shirish Shukla
Last edited by Franklin52; 03-24-2012 at 12:30 PM..
Reason: Please use code tags for data and code samples, thank you
Hi there,
I have a problem here that involves bash script since I was noob in that field. Recently, I have to monitor data involve in logs so I just run command tail -f for the monitoring. The logs was generate every hour so I need to quickly change my logs every time the new hour hits according... (2 Replies)
Hi All,
I have a question and hope someone will have an answer to that. I'm looking for a way to monitor log files being generated on a windows machine for some specified string and if its occurrence is found, raise an alarm though email. The log file size keeps on increasing and after a... (2 Replies)
hi All,
how to find a pattern in the log file & display the above and below line
for example in the log file, i have many lines, whenever i search for "Category" it should display the above line with only few parameter like i want only the location name & department name
Thu Jul 02 11:05:23... (2 Replies)
this is the format of the log file in my system
xxxxx_xxx_xxxx_xxxxx_09_10_2009_170457.log
xxxx_xxx_2_0_09_10_2009_163834.log
xxx_xxxxxxxxx_25_10_2009_045020.log
xxx_xxxxxxx_08_11_2009_055728.log
the path of this logs file in on for example
/dellxmax/application/log
what i want to do... (5 Replies)
Hi Folks,
I need help in creating a script to monitor a continuously updating log for one particular error. If the the script finds the error it should send out an email.
Thanks for all ur help (2 Replies)
Hi Friends,
I am trying to write a script which continiously monitor one specific error message from a log file. This script should continiously monitor the file for the error and send out the email when detect the error message. I tried the below command but fails. Please help me.
tail -f... (4 Replies)
AM in need of some plugin/script that can monitor HP-UX file "/var/opt/resmon/log/event.log" .
Have written a scrip in sh shell that is working fine for syslog.log and mail.log as having standard format, have interrogated that to Nagios and is working as I required .
But same script failed to... (3 Replies)
Hi,
I need to amend an existing ksh script so that it runs a process (stop weblogic) and in parallel needs to monitor a log file (startup.log) in the background for a certain string (e.g. unable to stop weblogic). If the string appears in the log i need to kill the stop weblogic process.
... (5 Replies)
Hello All,
I want to write a script to monitor my product logs from /var/log/messages and send notifications without using "tail -f" command.Please suggest alternatives and any other tools for monitoring and alerting.
Thank You (1 Reply)
I'm curious to know how do I add an empty log file (test1.log) to an existing text file to monitor all the changes made to a.txt.
Is this expression
export PATH=$PATH:/home/test1.log
right to be added to the text file a.txt? (5 Replies)
Discussion started by: TestKing
5 Replies
LEARN ABOUT DEBIAN
unbuffer
UNBUFFER(1) General Commands Manual UNBUFFER(1)NAME
unbuffer - unbuffer output
SYNOPSIS
unbuffer program [ args ]
INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose
you are watching the output from a fifo by running it through od and then more.
od -c /tmp/fifo | more
You will not see anything until a full page of output has been produced.
You can disable this automatic buffering as follows:
unbuffer od -c /tmp/fifo | more
Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the
-p flag. Example:
process1 | unbuffer -p process2 | process3
CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider:
process1 | unbuffer -p process2 | process3
If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may
not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or
process2.
In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific
solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro-
cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place-
holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder
for another process.
$ cat /tmp/abcdef.log | grep abc | cat
abcdef
xxxabc defxxx
$ cat /tmp/abcdef.log | unbuffer grep abc | cat
$ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat
abcdef
xxxabc defxxx
$
BUGS
The man page is longer than the program.
SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995.
AUTHOR
Don Libes, National Institute of Standards and Technology
1 June 1994 UNBUFFER(1)