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
I want to create a date folder and then a log file under it, which will hold all output of shell script. Say shell script abc.sh runs every day and I want to redirect the output of abc.sh > /opt/bea/wls81/Pkmtest/$(date +%Y%m%d)/ant.log.
Here date should always change according to system... (2 Replies)
I would like to monitor a log file using a shell script and as soon as a line with a certain string in it appears I would like to run a program. I have been playing around with doing this using tail -f, but cannot get it to work. I found something similar here:... (1 Reply)
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)
This is my log file and this is live log.
Any abnormal error other than following
I need to generate the email.
Log path : /DER/app/admin/ABC/bdump/erg.log
Current log# 2 seq# 103046 mem# 0: /ora2/oradata/ABC/redo02a.log
Current log# 2 seq# 103046 mem# 1:... (1 Reply)
This is my log file and this is live log.
Any abnormal error other than following
I need to generate the email.
Log path : /DER/app/admin/ABC/bdump/erg.log
Current log# 2 seq# 103046 mem# 0: /ora2/oradata/ABC/redo02a.log
Current log# 2 seq# 103046 mem# 1:... (7 Replies)
Hi,
Have written a script to monitor linux non standard log file based on line numbers, so each check store $otalinenum ..
then in next check after 10 minutes it compre the current_total_line_num > last_total_line_num then it will parse the log file from last_total_line_num to... (0 Replies)
Hi,
I need to amend an existing ksh script so that it runs a process (stop weblogic) and in parallel needs to monitor a log file (startup.log) in the background for a certain string (e.g. unable to stop weblogic). If the string appears in the log i need to kill the stop weblogic process.
... (5 Replies)
I'm curious to know how do I add an empty log file (test1.log) to an existing text file to monitor all the changes made to a.txt.
Is this expression
export PATH=$PATH:/home/test1.log
right to be added to the text file a.txt? (5 Replies)
Discussion started by: TestKing
5 Replies
LEARN ABOUT LINUX
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)