I'm executing "wc -lc" command in a c shell script to get record count and byte counts and writing them to a file. I get the result with the full pathname of the file. But I do not want the path name to be printed in the output file. I heard that using Awk we can get this but I don't have any... (4 Replies)
Hi,
I want to extract a part of filename and pass it as a parameter to one of the scripts. Could someone help.
File name:-
NLL_NAM_XXXXX.XXXXXXX_1_1.txt.
Here i have to extract only XXXXX.XXXXXXX and the position will be constant. that means that i have to extract some n characters from... (6 Replies)
Hi All,
I am trying to write a small shell programming to get db2 database size info. The command I am going to use is- db2 "CALL GET_DBSIZE_INFO(?, ?, ?, -1)"
and the output of above command generally is-
Value of output parameters
--------------------------
Parameter Name :... (4 Replies)
Hi friends,
I want to select and use the certain part of a line. For example I have the following line
home/1245/hgdf/acsdf/myhome/afolder/H2O/endfile
how can I extract the part " /myhome/afolder/H2O/endfile "
thanks (6 Replies)
Hi,
I have the following string and I need to extract the date from it:
TextHere,2012/07/11,1
I tried using sed:
sed -n 's#^.*\({4}/{2}/{2}\).*$#\1#p'
But it doesn't return anything. The following line doesn't even return '2012':
sed -n 's/^.*\({4}\).*$/\1/p'
I used to use grep -o... (6 Replies)
I have a file with 100s of lines of text. I want to perform an extraction of this line:
Info bpzs(pid=2652) using 1000 bits
I have not been able to extract it. Should I try expr match or is there another method? This line has data both in front of and in back of it. I do not have grep -o... (5 Replies)
I have to extract number part (Date and timestamp part ) from the following 3 strings
AB_XYZA_20130930183017.log
AB_DY_XYZA_20130930183017.log
AB_GZU_20130930183017.log
Output should be
20130930183017
Please help me to get the string like above
Thanks (2 Replies)
Hi All,
Let us say we have 5 log files, extract the data from all log files and save the output in a file.
home/log/first.log
home/log/second.log
home/log/third.log
home/log/four.log
home/log/five.log
I want to extract the following text from the log files and save the output in a file.... (7 Replies)
Discussion started by: ROCK_PLSQL
7 Replies
LEARN ABOUT CENTOS
trace-cmd-extract
TRACE-CMD-EXTRACT(1)TRACE-CMD-EXTRACT(1)NAME
trace-cmd-extract - extract out the data from the Ftrace Linux tracer.
SYNOPSIS
trace-cmd extract [OPTIONS]
DESCRIPTION
The trace-cmd(1) extract is usually used after trace-cmd-start(1) and trace-cmd-stop(1). It can be used after the Ftrace tracer has been
started manually through the Ftrace pseudo file system.
The extract command creates a trace.dat file that can be used by trace-cmd-report(1) to read from. It reads the kernel internal ring buffer
to produce the trace.dat file.
OPTIONS -p plugin
Although extract does not start any traces, some of the plugins require just reading the output in ASCII format. These are the latency
tracers, since the latency tracers have a separate internal buffer. The plugin option is therefore only necessary for the wakeup,
wakeup-rt, irqsoff, preemptoff and preemptirqsoff plugins.
With out this option, the extract command will extract from the internal
Ftrace buffers.
-O option
If a latency tracer is being extracted, and the -p option is used, then there are some Ftrace options that can change the format. This
will update those options before extracting. To see the list of options see trace-cmd-list. To enable an option, write its name, to
disable the option append the characters no to it. For example: noprint-parent will disable the print-parent option that prints the
parent function in printing a function event.
-o outputfile
By default, the extract command will create a trace.dat file. This option will change where the file is written to.
SEE ALSO trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-reset(1), trace-cmd-split(1),
trace-cmd-list(1), trace-cmd-listen(1)AUTHOR
Written by Steven Rostedt, <rostedt@goodmis.org[1]>
RESOURCES
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
COPYING
Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).
NOTES
1. rostedt@goodmis.org
mailto:rostedt@goodmis.org
06/11/2014 TRACE-CMD-EXTRACT(1)