Ubuntu :: Memory Scan On CD?
Oct 22, 2010
One of the things I found really handy about the Live Ubuntu CDs is they had the option to run a memory scan on the computer. As the head of an IT department of one person in charge of maintaining 60 computers, that capability has helped me more than twice.
I think the options when running off CD/USB were Install Ubuntu, Test Ubuntu, run a memory scan, or boot off the harddrive. However, starting with Lucid and continuing with Maverick, the only options on the Live CD/USB seem to be install or try (although the memory scan is available on my Grub menu after Ubuntu is installed, unfortunately, most of the computers I am responsible for at work are Windows only).
Is there a way to start the memory scan when running a Live Lucid or Maverick CD/USB?
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Jan 9, 2011
I installed squeeze on my eeepc 1015ped and downloaded the correct firmware-brcm80211 drivers but every time I scan for my network using iwconfig wlan0 scan or wicd, my computer completely freezes. I previously had a solid install running xmonad, and wicd was working like a charm (using the same broadcom driver) but i tinkered too much with it and decided to do a fresh install. I haven't quite run into a problem like this before.
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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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Apr 19, 2010
I get this error when I run "sudo apt-get install python-software-properties"
Preconfiguring packages ...
dpkg: unrecoverable fatal error, aborting:
fork failed: Cannot allocate memory
E: Sub-process /usr/bin/dpkg returned an error code (2)
I'm trying to install deluge via ssh and my vps has 512mb ram and is only using 11% of it prior to running the code.
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Jan 29, 2011
I have had a fresh install of Ubuntu 9.10 and installed some software after that.Since third some, some process is eating half of my memory.I have checked processes running in system manager but everything is normal.Maximum is consumed by compiz which is about 26 mb, seems very normal.I did restarted my computer several times, and in the start for 5 mins, its fine after that again my cpu fans runs at very fast speed and my one cpu is used up 95 % (I have dual core).Please help me out, this invisible thing is driving me crazy.I am attaching my htop screen shot (sorted by cpu %), now the cpu is not used by completely but fan is still struggling hard and fast.
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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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Feb 7, 2011
Fedora 14 xfce
HP Mini 210
I am looking to buy some memory for my netbook. Currently I have 1 GB of DDR3 memory. However, the specification says that 2 GB of memory is the max. However, when I do the following it says that 4GB is the max:
[Code].....
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Jan 11, 2010
let me know how to clear cache memory ( RHEL 5.1 ) as it consumes almost 100% physical memory.
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May 3, 2011
I am looking for free database that has low memory usage and innodb and memory like engins that has C API and support trigger and client/server support for using in embedded linux systems.
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Mar 21, 2011
I am new to C and linux. My code below does arbitary writes but I cant figure out where or how it does it.
I am calling the insertNode() function with seq = 'MISSISSPPI$' and alphabets = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ$'
Code:
Weird behaviour I should mention is that when I check for NULL pointer in node->child[index], the unassigned values are not null anymore, they point to arbitary memory.
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Feb 3, 2010
we found that if we use 'top' to show the memory usage of a server (SuSe Linux 10), we can get virtual memory usage as well as 'Resident memory' usage. For virtual mem or a particular process, it is around 1.1GB, which is large but for resident memory, it only consumes 300MB. Are there anyone who knows what the differences are? I would also like to know whether the difference (1.1GB - 300MB) = 800MB are actually available for use by other applications in the system.
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Apr 13, 2010
How do I write a script for my Linux that can show me total memory vs used memory and have it email me results if it's over 70 percent?
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Oct 20, 2010
I am monitoring physical memory in a server I administer, and my hardware provider told me they had increased physical memory size to 4Gb... However, using several tools (free -m; top; dmesg | grep Memory; grep MemTotal /proc/meminfo I discovered that I actually have 3Gb, not 4... But, my doubt comes from the fact that dmesg | grem Memory tells me I have 3103396k/4194304k available The first number is effectively 3Gb, but the second one, is 4! so, why I am looking at this two different numbers?
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Nov 22, 2009
I am writing an application that wants to access periphals registers outside the standard (allowed) memory area.
Doing so gets me "segmentation fault".
I know, this is natural behaviour.
One way of getting around this is writing the module which has to be loaded by linux. I will consider this some time later.
For now, I want to come to some quick result and allow linux or gcc compiler to write to those memory areas of periphals. Is there a direct way to do so?
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Aug 25, 2010
Is that possible that SHM shared memory is counted as cache memory on Linux with kernel 2.6.18?If find it really odd since this memory is not file backed, but I have a piece of code that loads data using shm_open+mmap, and it generates an amount of cache memory in /proc/meminfo that corresponds exactly to the amount of shared memory (I load that data from a file but I am using posix_fadvise(fd,0,0,POSIX_FADV_DONTNEED) to ensure this file is not cached and I made sure that it is working as expected). As far as I know SHM memory was not tagged as cache memory with kernel 2.6.9.If it is the case it is really unfortunate since normally cache memory can be considered to be part of the "available" memory since it can be flushed promptly but this is clearly not the case with SHM memory... Is there an easy way to get the total amount of used SHM memory on a system?
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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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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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Jan 8, 2011
I have been setting up a vps I got out with bhost.net, with CentOS installed. I've been learning and have set up everying I need with the exception of ftp/sftp.
Using yum I installed vsftpd and ran into problems, thinking it was something I might of done I did a fresh install of CentOS and I still recieve the same problem on a fresh install so it is nothing I have done to the server.
The problem is when connecting via a sftp client I get an out of memory error. This error is listed in the putty faq ( url ) under A.7.5, there is a brief explaintion of the cure under A.7.6.
there is mention of a login script but I don't know where this is located. I'm a novice at Linux but by no means incompotent when it comes to computing.
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May 4, 2010
I have a query regarding top & virtual memory. When we run top it show VIRT (Virtual Mem), RES (Resident Mem) & SHR (Shared Memory). The total virtual memory of my machine is 4 GBs (2 GB RAM + 2 GB Swap), but still I am able to see a process showing 4000m virtual memory column. what it means, as its show VIRT Mem more than actual available VIRT memory
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Mar 21, 2011
When I start bluej and try to open files from my memory stick the memory stick is not available. Is there any way that I can open files directly in bluej from my memory stick.
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Jun 3, 2011
Is there an AV i can use to scan my windows partition to find any bugs/backdoors or viruses? I know there is a backdoor somewhere, and comodo isnt picking it up so i am refusing to boot from my windows 7 right now. My password information keeps getting changed and websites and emails are alerting me that someone has access to them and is trying to promote spam.
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Jun 4, 2011
I have just installed 11.04 (64-bit) and I cannot scan as a user. Scanning as root works fine. My device is a Brother MFC-7420. I've installed the brscan2-0.2.5-1.amd64.deb package from the brother page. After installing this, I can run xsane as root and scan perfectly.
I could not find any instructions for enabling this as a user on 11.04, so I followed the instructions for 10.04 at [URL]...n1c.html#u9.10 and added the following between libsane_usb_rules_begin and libsane_usb_rules_end
Code:
# Brother scanners
ATTRS{idVendor}=="04f9", ENV{libsane_matched}="yes" I then restarted udev, turned my device off and on again and tried to run xsane. I get the following error:
Code: "Failed to open dvice `brother2:bus3;dev1': Invalid argument I looked at what the rules were trying to do when libsane_matched is set to yes, and found that setfacl was not installed on my box. I installed this and changed the line to read
[Code]...
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Sep 1, 2011
I updated to KDE 4.7 today with MUCH trouble muon hung at towards the end of the updrade at 100% so i had to force quit with " sudo ksysguard" it refused to boot into the desktop so i had to complete the upgrade from the terminal/safe mode when it finished i could not get my wireless to work my drivers is installed properly and i have tried toggling the wireless switch, much to my dismay but nothing seems to work. i can't scan for networks and the network-manager app just reports "WLAN Interface: Error: Invalid state"
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Jan 26, 2010
I just bought an hp 6500 wireless printer, and after taking 5 minutes to set it up (amazing how easy it is to get hardware working that supported by Linux) I was happily printing...But- I haven't managed to get it to scan from my desktop pc running 9.04. Tells me no device is found. I added the printer to a laptop running 9.10, and it scanned perfectly straight away...
I've been through the Ubuntu help documentation and haven't found a solution.I think that maybe Turbo Print (for our old Canon printer) might have messed something up. I had to uninstall Turbo Print to get the printer to work (it hijacked Ubuntu's built in printing stuff).
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Feb 17, 2010
I have a Deskjet F2400 series and want to scan a document to a file from the command line without having the HP Device Manager being invoked.
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Apr 8, 2010
i have hp photosmart c4340 combine printer i need to scan documents and send them via email with a preview page meaning a page where i write to who the document needs to arrive how can i do this?
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May 13, 2010
I know everyone may discard this post because you do not need AV on linux BUT i am trying to use my linux PC as a download horse and would like to scan the files for viruses before I move them to my Windows machine. I downloaded and installed the latest AVG, how do I scan specific files, is it the avgscan command? I check /opt/avg/avg8/log for the scan results of a folder scanned and nothing. I tried avgscan -o -p ~/downloads where -o shows even clean files but after i run the command, there is nothing shown in the prompt and nothing in the log file.
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Jun 27, 2010
I have a small bash script that compress all folders in a specific folderThe script also:- add a password to the compressed files- delete the original folder after compressionSuppose that this script is called "rar.sh".At some particular moment, there will not have any folder in the specific folder since they have all been compressed.I want something (a script?) that will check (every minute approximately) if there's new folder in the specific folder.If there's new folder, then execute script rar.shor if there's not new folder, then re-scan in the next minute.
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Jul 1, 2010
I'm able to scan using both xsane and the HPLIP utility however I can't figure out how to respond to a Scan button press on the device itself.
In the HP Device Manager there's a section about responding to button presses on the device, but it's disabled and I haven't seen any way to enable it.
I found info about scanbuttond but it looks very out of date and I haven't been able to find anything recent that does the same thing. Is this just something that isn't supported?
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Jul 11, 2010
i have a printer with a wireless connection and a router with wireless capabilities can i use it some how?
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