The 'exec' command can be used to reopen file descriptors, letting you point them wherever you please. Here I feed stdout into a fifo, so tee can read it.
I'm working on a script that will perform a backup, save a log of said backup and send the output to me in an email. Everything is working fine so far except that I can't figure out how to specify a maximum file size for the log file. I don't want a runaway log file jamming up the server.... (7 Replies)
Hi,
I am running my script using nohup, but I am not able to capture the log file for that process could naybody please help...
Here is what I am doing....
nohup ./script & 1>/home/user1/log.txt
but I am not able to capture the log.....Is there anyother way I can capture the log... (2 Replies)
Hi ,
I have seen some log files where they have captured the command that is being executed, comments present in the scripts and the out put of the command as well, through scripts. could any one of you please let me know how do i do that?
Thanks in advance.
Cheers,
Waseem (4 Replies)
Hi All :
I wanted a unix command by which I could be able to print the output to a file and at the same time to a printer. Any help will be greatly appreciated.
Regards,
Ramamurthy Dasari (1 Reply)
Hello,
If I run a program from within shell, the output is displayed in the command line terminal. Is there a way I can capture that output and choose only the very last string in it to send it to a new file?
Thank you (6 Replies)
Hi,
I am running a shell script called dbProcess.sh which performs shutdown and startup of various Oracle instances we have.At the time of execution the script produces the following output to the command line window
$./dbProcess.sh stop
#### Run Details ######
Hostname : server-hop-1... (4 Replies)
Hi
I have a requirement to write a script to capture all errors in a Logfile and send the file in email.
If there is any error occurred the subject of email will be ERROR , If there are no error occurred the subject of email will be SUCCESS.
So I created a Log file and put the Appropriate... (2 Replies)
I want to capture the debug for the below command in output file .
i tried like this but its not working:
sh -xv <scriptname> >> output.log
i want the output in a log file.
Anyone plz help in this (2 Replies)
Hi,
I am trying to capture the output of the an open pipe in perl. but I am not sure how to do this. can some one please help me do that?
Below is the script I am using (2 Replies)
Dear all,
I have a log file to be analysed. this log file contains vaiours lines of code starting with date timestamp.
if my search string is exception then that resepective log statement starting from the date is required.
example:
2014/10/01 16:14:44.459|>=|E|X|19202496|2832|... (5 Replies)
Discussion started by: shravee
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)