General :: Collect / Tool For Memory Dump?

Dec 10, 2010

how to collect the memory Dump In Linux?

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Security :: Any Way To Get GDB To Dump Memory Map?

Apr 21, 2010

is there a way to get GDB to dump memory map so I can see if certain parts of the memory is executable or not (i.e : if heap/stack is executable). Do you know of a way to do this within GDB session?
Just didn't use gdb, and did instead:
cat /proc/$PID/maps

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General :: Memory Corruption Tool In A Program?

Oct 14, 2010

Kindly let me know the Linux tool to find out the memory corruption in a program. The tool could be built for PPC as well.

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Programming :: Core Dump - Right Memory Block To Be Freed

Nov 8, 2010

In one of our core dump we have the followings in the core back trace:

#0 0xb77bf947 in raise () from /lib/tls/
#1 0xb77c10c9 in abort () from /lib/tls/
#2 0xb77f56ba in __fsetlocking () from /lib/tls/
#3 0xb77fcf7f in mallopt () from /lib/tls/
#4 0xb77fd022 in free () from /lib/tls/

It occurred in a memory block free operation. From our analysis, there seems no issue relate the the memory block it self. The memory pointer pointed to the right memory block to be freed and the contents of the memory seems right (not corrupted), in one world, there is nothing obviously wrong. Does any one have any ideas what could be wrong when seeing about?

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Programming :: Subsequent Calls To Realloc Cause Memory Dump?

Feb 17, 2010

I'm trying to write a C program that extends an array to any user inputed size.

if (arraysize == 0) {
arraysize = (int) pos + 1;
a = (int *) calloc (arraysize,sizeof(int));
for (i = 0 ; i < arraysize ; i++ )
a[i] = -1;

The program dumps with that sequence of inputs everytime, but might dump an input before or after if different positions are requested. Interestingly, when I tested pos = 2000..2008, I got no dumps. So is realloc somehow trying to extend the array into bad space?

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OpenSUSE :: Zypper Won't Die / Dump Process Out Of Memory Without Requiring It To Respond To Signal?

Feb 4, 2010

This is opensuse 11.2.

Somehow zypper is running at 100% cpu and won't die with command line kill, the system monitor kill, terminate or anything. I set it's priority to the lowest it will go, tried to stop it then kill it, nothing works as it simply is not responding to anything and it has been running now for 47 hours.

Is there a way to simply dump a process out of memory without requiring it to respond to a signal? because signals are doing nothing.

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General :: Is There System Admin Tool For RHEL On Montioring And Logging System Memory

Apr 20, 2011

Is there a system admin tool for RHEL on montioring and logging system memory used and released that can dump to a log file?I'm having an issue with memory not being released when an application is closed. I need to have a tool monitor and log so I can troubleshoot to verify that it's an application not the OS.

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General :: Collect All Logs Of Unix Server?

Dec 26, 2010

I am installing RHEL 5.5 to be a syslog server to collects logs from servers (HP-UX, Linux, Windows and Cisco Network Devices). and i can now collect logs from my windows PC on syslog linux server by using Datagram SyslogAgent software. can collect logs from HP-UX 11.23 server. and i configuring the Unix server as in the steps below:

1. Log in as root

2. Go to /etc/syslog.conf

3. Add a line: *.*<tab>@<Sentinel Server IP Address>

*.* @

4. Save and Close

# netstat -na | grep 514

tcp 0 0 *.514 *.* LISTEN
udp 0 0 *.514 *.*


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General :: Collect The Count Of The Reboots That Occur Of Servers?

Apr 21, 2010

I have a pool of approximately 1,000 Linux servers and I would like to get a total count of reboots that occurred on those servers each month. I would like to collect this reboot count at the end of each month. Can anyone tell me what the best way to get this count.

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General :: Collect Data From Nagios Once A Week And Have It Sent/mailed?

Feb 2, 2011

We need to collect data from nagios once a week and have it sent/mailed.What would be a good place to get it? I am thinking starting with nagios/var/nagios.logscan it once a week and get most recent entries from each hosts.

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Programming :: Incremental Backup Using DUMP Command - Error "DUMP: Only Level 0 Dumps Are Allowed On A Subdirectory"

Sep 6, 2010

I have used Dump Command to dump the application files. For Full backup the level 0 is working fine. For incremental backup I used the level 1 or 2 it is getting the error as

DUMP: Only level 0 dumps are allowed on a subdirectory
DUMP: The ENTIRE dump is aborted.

The code I used
#Full Day Backup Script
#application folders backup
#test is the username
now=$(date +"%d-%m-%Y")

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General :: Create A *one* Line Command That, Using Tar, Will Collect The Full /usr/local Directory?

Oct 6, 2010

I am currently interning at a place and my job is to essentially learn UNIX. My supervisor gives me problems here and there to help guide me with my learning but for the most part I'm doing this all by self-teaching myself. Needless to say I have run into a few obstacles...for instance-Create a *one* line command that, using tar, will collect the full /usr/local directory (you need to run this as root again) and copy the whole /usr/local structure under /optFor example /usr/local/bin/hello will become /opt/local/bin/hello, etc. I want this as follows:1. /usr/local is collected by tar, but the output of this tar command is its stdout.. what you get from the previous stdout, you compress with gzip and send it to stdout again 3. get this output and decompress with gzip.. get this output and pipe to tar in a way that will extract the tree under /opt.If anyone knows how I could go about doing this, please let me know, or at the very least point me in the right direction. What I've got so far (which could be completely wrong) is:tar cvf - usr/local/ | gzip -c - | gunzip -c - | tar xvf -in theory I feel like this should work (except for extracting the tree under /opt...i'm kinda stuck there)

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Programming :: Effective Tool For Run Time Errors And Memory Leaks Detection

Dec 28, 2010

Created application is working too slow, looks like there are a lot of memory leaks, there are a lot of pointers. Any effective tool for run-time errors and memory leaks detection in Visual Studio C++?

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Programming :: Core Dump Issues. Program Crashes But Does Not Generate Core Dump File?

Oct 7, 2009

I want to generate core dump files from my program when it crashes. Its a pretty big process and has about 10-11 threads in it.I have followed the documentation to enable core dump by setting ulimit to unlimited etc. I quickly tried "A demo program creating a core dump" from the following webpage, which succeeds in Segfault and dumping a core file in the directory that I configured.However, I tried running my original program and caused it to crash. I did this by making calls to kill(), raise() or the same null pointer access as shown in the webpage above. In each case, my program crashed but did not generate a core dump file. Am I missing something?My program is in C++ and my environment is Redhat 9.0 (kernel 2.4.20)

Going through the "Why do I NOT get a core dump?" section on the same webpage as above, I can see two potential problems. One - there are issues with the suid/sgid (bullet # 6). I am not able to change any settings with suid because my system does not contain either /proc/sys/fs/suid_dumpable or /proc/sys/kernel/suid_dumpableTwo, my program has threads in it and the bullet # 8 is the problem.

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General :: Write A Shell Script Which Will Simultaneously Collect OS User Information And Write In An Individual Text Files?

Feb 17, 2010

I want to write a shell script which will simultaneously collect OS user information and write in an individual text files.Can anyone tell me the syntax of the script.N.B. The user name will be mentioned in an array within the shell script.

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General :: How To Get BGP Table Dump

Jan 18, 2011

Recently I tried to get BGP table dumps from public route servers. I telnetted into one of those public route servers and ran "show ip bgp" command. My question is: how to save the command output to my local machine? I cannot run "show ip bgp > tmp.txt" on the remote route server.

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General :: Application Virtual Address Space Memory Allocation - Memory Does Not Get Free

Apr 20, 2010

I am using malloc and frees a lot in my program. It shows its allocated but when i remove it doesnt show as the memory is removed(I am using the top command to view VIRT memory usage). If this continously grows what would happen to my program (Will it go out of memory?)

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General :: Ubuntu - Memory Full, Process Memory Usage Doesn't Add Up In Top?

Mar 18, 2011

I have a computer with 16GB of ram. At the moment, top shows all the RAM is taken, (NOT by cache), but the RAM used by the various processes is very far from 16GB.I have seen this problem several times, but I don't understand what is happening.My only remedy so far has been to reboot the machine.

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General :: Child Process Does Not Core Dump

Jul 27, 2011

In my program, I fork() to get a child process. Because of some problem, child process terminates by a segmentation fault. Parent process is still running. I have compiled my code with -g option. I have done: ulimit -c unlimited. I am not getting core dump of the child process. How can I get the core dump of child process?

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General :: Creating Dump Of Existing File?

Oct 21, 2009

How to create a dump of an existing file and how to restore it with command line?

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General :: Rebuild System From Dump Tape?

Feb 8, 2010

I have a Red Hat Enterprise (AS) 4.8 system and I need to know how to totally rebuild the system from dump tape. I have been making some full level 0 dumps of the system to the attached DAT72 tape drive... In the case the boot disk goes south, I need to reload from tape, onto a new disk drive. I know how to do this in Solaris. I assume you boot from CD to like a mini-root, then configure and mount the drive on temp mount points, restore the sys data, then load the "boot blocks" (like installboot on solaris).

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General :: Trying To Get Dump To Backup Home Directory

Mar 27, 2011

I would like to have dump backup just my home directory but am having problems the command I am using wants to back every thing and takes hours upon hours it has been running for about 10 hr and only 21% is done. This is the command dump -0u -f dp_hd /media/CENTON USB/ /how can I get this to back up only my home directory

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Ubuntu :: Collect Multiple Windows In One?

Feb 8, 2011

i wondered if there is no gnome Software with it would be possible to "Collect" multiple Windows together.

As 4 Terminals or 2 Terminals and a gedit.

I dont think about tabbed views, i think about viewing them side by side. I know that it would be _possible_ to this by hand, but it would be *much* easier doing this with an application. I often want to see 4 terminals at a time and its really unhandy to do this by hand

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General :: Software/method Use To Make Matroska Dump Of DVD?

Mar 8, 2010

I have set of DVD disks. I'd like to rip them to .mkv files, but with all information - i.e. all subtitles, and all audio tracks. Is there any tool on Linux that I could use to do it? I found some Gentoo howto about ripping, but it requires writing shell scripts, and I'd rather use something with clickable interface.

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General :: Read Dump Contents Of Tape Driver?

Jan 12, 2011

I have installed, LTO-5 in rhel 5.

now i have taken a backup using command.

dump 0uf /dev/nst0 /dir

now i want to see contents of tape.

the command tar tvf /dev/nst0 is showing error

is there any other command to see dump backup contents

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Networking :: Tcp_probe Doesn't Collect All The Data?

May 2, 2011

I'm trying to plot the TCP congestion window and the slow start threshold using iperf and the tcp_probe module. I do exactly what is told here:

to obtain the data:

modprobe tcp_probe port=5001
chmod 444 /proc/net/tcpprobe
cat /proc/net/tcpprobe >/tmp/tcpprobe.out &


I did the test with iperf for 10, 20, 40 100 and 200 seconds but the plot only showed the first 20 seconds in all of the tests. I checked the tcpprobet.out log and y saw that 2048 entries are registered, no matter if the test was for 20 or 200 seconds.

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General :: Memory Corruption Detected In Low Memory

Aug 22, 2010

This is my first post in these forums. I'm still quite new to Linux (using Mint 9) so please bear with my not-very-articulate question(s)When I boot up and open up a tty terminal I get a message saying "Memory corruption detected in low memory." I've done an extensive google search about the issue and it seems not uncommon. I ran a memtest with no errors returned, so I'm sure that there's nothing really wrong with the memory; apparently it's a bug in the kernel that's causing this.

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General :: Top Used Memory Versus Ps Processes Memory

Jan 17, 2010

I found from command 'top' that 8GB memory are used. However, using command 'ps' with some options to grep the running processes and then summing up the memory used by the running processes are less than 2 GB. Where has the used memory gone ?

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General :: Dump Command Backup Entire File System?

May 22, 2010

Does the dump command back up entire file-systems or is it capable of backing up subsets of a file-system? And is tar capable of taking device names (for file systems) as input to be archived?

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General :: How To Change To Single User Mode In Dump Script?

Apr 26, 2010

I have this dump script that performs either full or incremental backups depending on the day of the week. From what I have read, when using dump you should drop to single user mode to help prevent the backups from being inconsistent before you issue the dump command. What I want is the script to drop to single user mode, perform the backups using dump, and then go back to runlevel 3 after the backups complete.

I know when you enter init 1 to drop to single user mode, but doing so within a script reboots the computer and drops it to single user mode and the rest of the script doesn't complete.What would be a good method for me to be able to accomplish what I want to do? Do I need to run other scripts that would call mine?I am running Centos 5.4

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