Hi All,
I am having trouble through, I am reading the input from tab delimited file containing several records,
e.g.
line1 field1 field2 field3 so on..
line2 field1 field2 field3 so on..
..
..
on the basis of certain fields for each record in input file, I have to retrieve... (1 Reply)
Hi,
I have a sample data file that contains name-value pairs in it.
For example:
name1=value1
name2=value2
name3=value3
...
...
...
My concern is
1. How to get values of name1, name2, name3 using korn shell script?
2. I don't want to access each varible using $name1,$name2, $name3... (2 Replies)
There is one Text file data.txt.
Data within this file looks like:
a.sql
b.sql
c.sql
d.sql
.....
.....
want to write a shell script which will access these values within a loop, access one value at a time and store into a variable. can anyone plz help me. (2 Replies)
Hi, I am writting some perl scripts for daily backup process. In which I want to pass some data/referance from another txt file. Text file contains only one column and multiple rows. I want to pass this data to variables of another perl script.
e.g.
Refdoc.txt file contains data as:
perl1... (3 Replies)
Hi,
I have below type of data in a text file in unix.
Emp_Name Emp_Dept
Raj 101
Amruta 100
Shilpa 100
Rohit 123
Amol 198
Rosh 101
Gaurav 198
Number of employees can be even more.
Need a command or a... (2 Replies)
I have a requirement to read the xml file and split the files into two diffrent files in Unix shell script. Could anyone please help me out with this requirement.
Sample file
---------------
0,<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Information... (3 Replies)
I need some help with this code below, i doesnt know why it will run twice with my function, but my function only got if else, any other way that can read line and put into array?
while read line; do
read -A array <<<$line
n=${#array}
for ((i=1;i<$n;i++)); do
print... (1 Reply)
Hi everyone,
I am trying to write a bash script which reads a data file and does some algebraic operations.
here is the structure of data.xml file that I have;
1 <data>
2 .
3 .
4 .
5 </data>
6 <data>
7 .
8 .
9 .
10</data>
etc.
Each data block contains same number of lines (say... (4 Replies)
I have a process that requires me to read data from huge log files and find the most recent entry on a per-user basis. The number of users may fluctuate wildly month to month, so I can't code for it with names or a set number of variables to capture the data, and the files are large so I don't... (7 Replies)
Discussion started by: rbatte1
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)