Can anyone tell me how to remove a portion of a large file to smaller ones? What I have is a large file that was created becasue several similar files were joined together. Each individual file starts with MSG_HEAD. I want to take everything from MSG_HEAD up to were it says MSG_HEAD again and... (13 Replies)
hi i would like to know whether i can delete a part of a file in C
for eg. if my file contained
1234567890
and i want to delete
456
so that it becomes
1237890
is there a way i can do this.
well, one way i can achieve this is by creating a new file, copy whatever i want, then delete the... (2 Replies)
How will i convert a file
<LDATE>10-12-07</LDATE><LTIME>13:47:48.553</LTIME><LTEXT>name:anju;city:blore;ph:123</LTEXT>
<LDATE>10-12-07</LDATE><LTIME>13:47:48.553</LTIME><LTEXT>name:anju;city:blore;ph:123</LTEXT>... (8 Replies)
Hi everyone,
I need to know how to remove a chunk of codes from a file
for instance i have couple of lines which are commented out of the file and i need to remove that block. here is the example
--#------------------------------------------------------------------
--# File name= ... (5 Replies)
Hi,
I have a little problem. I am having a file with pattern like :
asdf;ffgg;dfjfj;djdfjf;nnjj;djd;ssj;
I just want to print the portion from last ";" upto the immediate previous ";". There are several ";" in my line.
Please help me out...
Thnx in advance (8 Replies)
Hi,
I need to devide one file into 3 files based on column numbers and put a string (FILE1, FILE2, FILE3) in the last.....
Input file:
Column1,Column2,Column3,Column4,Column5,Column6,Column7,Column8,Column9,Column10
Output1:
Column1,Column3,Column6,Column4,Column5,FILE1
Output2:... (6 Replies)
Hi,
I have a folder that contains many (multiple) files
1.fasta
2.fasta
3.fasta
4.fasta
5.fasta
.
.
100's of files
Each such file have data in the following format
for example:
vi 1.fasta
Code:
>AB_1
MLKKPIIIGVTGGSGGGKTSVSRAILDSFPNARIAMIQHDSYYKDQSHMSFEERVKTNYDHPLAFDTDFM (6 Replies)
Need to sort a portion of a file in a Alphabetical Order.
Example : The user adam is not sorted and the user should get sorted. I don't want the complete file to get sorted.
Currently All_users.txt contains the following lines.
##############
# ARS USERS
##############
mike, Mike... (6 Replies)
Hi ladies and gentleman.. I have two text file with me. I need to replace one of the file content to another file if one both files have a matching pattern.
Example:
text1.txt:
ABCD 1234567,HELLO_WORLDA,HELLO_WORLDB
DCBA 3456789,HELLO_WORLDE,HELLO_WORLDF
text2.txt:
XXXX,ABCD... (25 Replies)
Discussion started by: bananamen
25 Replies
LEARN ABOUT CENTOS
trace-cmd-restore
TRACE-CMD-RESTORE(1)TRACE-CMD-RESTORE(1)NAME
trace-cmd-restore - restore a failed trace record
SYNOPSIS
trace-cmd restore [OPTIONS] [command] cpu-file [cpu-file ...]
DESCRIPTION
The trace-cmd(1) restore command will restore a crashed trace-cmd-record(1) file. If for some reason a trace-cmd record fails, it will
leave a the per-cpu data files and not create the final trace.dat file. The trace-cmd restore will append the files to create a working
trace.dat file that can be read with trace-cmd-report(1).
When trace-cmd record runs, it spawns off a process per CPU and writes to a per cpu file usually called trace.dat.cpuX, where X represents
the CPU number that it is tracing. If the -o option was used in the trace-cmd record, then the CPU data files will have that name instead
of the trace.dat name. If a unexpected crash occurs before the tracing is finished, then the per CPU files will still exist but there will
not be any trace.dat file to read from. trace-cmd restore will allow you to create a trace.dat file with the existing data files.
OPTIONS -c
Create a partial trace.dat file from the machine, to be used with a full trace-cmd restore at another time. This option is useful for
embedded devices. If a server contains the cpu files of a crashed trace-cmd record (or trace-cmd listen), trace-cmd restore can be
executed on the embedded device with the -c option to get all the stored information of that embedded device. Then the file created
could be copied to the server to run the trace-cmd restore there with the cpu files.
If *-o* is not specified, then the file created will be called
'trace-partial.dat'. This is because the file is not a full version
of something that trace-cmd-report(1) could use.
-t tracing_dir
Used with -c, it overrides the location to read the events from. By default, tracing information is read from the debugfs/tracing
directory. -t will use that location instead. This can be useful if the trace.dat file to create is from another machine. Just tar
-cvf events.tar debugfs/tracing and copy and untar that file locally, and use that directory instead.
-k kallsyms
Used with -c, it overrides where to read the kallsyms file from. By default, /proc/kallsyms is used. -k will override the file to read
the kallsyms from. This can be useful if the trace.dat file to create is from another machine. Just copy the /proc/kallsyms file
locally, and use -k to point to that file.
-o output'
By default, trace-cmd restore will create a trace.dat file (or trace-partial.dat if -c is specified). You can specify a different file
to write to with the -o option.
-i input
By default, trace-cmd restore will read the information of the current system to create the initial data stored in the trace.dat file.
If the crash was on another machine, then that machine should have the trace-cmd restore run with the -c option to create the trace.dat
partial file. Then that file can be copied to the current machine where trace-cmd restore will use -i to load that file instead of
reading from the current system.
EXAMPLES
If a crash happened on another box, you could run:
$ trace-cmd restore -c -o box-partial.dat
Then on the server that has the cpu files:
$ trace-cmd restore -i box-partial.dat trace.dat.cpu0 trace.dat.cpu1
This would create a trace.dat file for the embedded box.
SEE ALSO trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(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-RESTORE(1)