I AM TRYING TO APPEND THE HOSTNAME OF A UNIX SERVER I WORK WITH SO I COULD DO A LOADING INTO A DATABASE.
THE COMMAND I AM USING IS
df -k | sed 's/^/dataserver /'
What I intend to do is append the hostname dynamically by using the hostname command instead of having to manually enter... (1 Reply)
Hi ,
echo "07/05/2008" | sed 's/\(..\)\/\(..\)\/\(..\)/\3\2\1/'
Output :: 20050708
Expected output is 20080507
Iam not getting the bug in this.
Thanks for the help
-- penchal (4 Replies)
Hi,
I have to use SED to remove the prefix "219-" from a text file containing phone numbers and I have to remove the ":" as well. I write the following code but it does not seem to work. Can someone help me please?
mohit@mohit-desktop:~$ sed -n s/219-/" "/p corp_phones_bak > noprefix1... (2 Replies)
Hi All!
I am trying to use shell variables in a sed statement, but facing an error.I used the double quotes instead if single quotes in the sed statement.
# sed -i -e "s/password/$decoded/g;" $CATALINA_HOME/conf/server.xml
sed: -e expression #1, char 11: unterminated `s' command
#
... (5 Replies)
I have a file with a lot of numbers in it and I need to clean it up and make it look nice and proper. I found this little gem of a one-liner and basically understand what it is doing but I would like to further understand what each part of the command is doing. Being a newb, I am just trying to... (2 Replies)
Hi all
In input file I have records like this:
0,1,0,87,0,0,"6,87","170,03",0,"43,5",0,0,0,0,"6,87","126,53"and in output file I need that these records transforms in :
0 1 0 87 0 0 6,87 170,03 0 43,5 0 0 0 0 6,87 126,53
Could you help me in this case? Please (3 Replies)
Hi
i am stuck with a very silly problem :mad:
below is my code
echo 201010_1212_121.xml
i need to replace xml with csv so i did
echo 201010_1212_121.xml | sed 's/.*\.xml/.*\.csv/'
echo 201010_1212_121.xml | sed 's/*.xml/*.csv/'
echo 201010_1212_121.xml |... (4 Replies)
Hi Folks,
I want to replace these numbers with words as the following:
$echo 1 11 223
I want to replace each number with it name (e.g. "1" replaced with "one", etc.) just to determine how sed works in such case. Thanks in advance:).
Leo (8 Replies)
I don't know if you guys get this problem sometimes at Terminal but I had been having this problem since yesterday :( Maybe I overdid the Terminal. Even the codes that used to work doesn't work anymore.
Here is what 's happening:
* I wanted to remove lines containing digits so I used this... (25 Replies)
Discussion started by: Nexeu
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)