Ubuntu :: How To Avoid Flood When Using Gparted
May 15, 2010
specs: toshiba lappy
110gb hdd, 1gb ram, core 2 duo 1.6ghz, nvidia 7600
windows xp pro service pack 3
jaunty jackalope
my problem is: i wanted to repartition (shrink xp and create partition for data storage) my hdd using gparted live cd 0.5.2-9. everything went fine until i clicked exit and reboot. after the cd tray automatically ejected i got a flood of "VFS: busy inodes on changed media or resized disk srO". this doesnt stop until i press enter. after that it reboots normally and there is no problem with the os.
my questions: 1) is that flood anything bad, is there a way to avoid this. i read somewhere that the problem is solved when using the terminal sudo eject - then push back the cd tray - then sudo eject -t. i tried that but it said failed because gparted cd is in use.
2) the first time that happened i didnt know what to do, so it flooded like for 15min or more until i pressed enter. my question is if the flood is being saved anywhere on the pc so that i have to delete it?
and a question regarding extended partition: 3) i have 50gb left that i want to use for data storage. i read that you can only have one extended partition. so since there is already one extended partition from ubuntu, i cant have another one for windows? so i can only make the data partition as primary or is there another reason why the "create extended partition" is greyed out?
last question: 4) when i set up the partition for swap i made it 1032gb big but in gparted it shows 980.53mb. is that still enough or why is it like that because somehow the sizes of the partitions seem a bit different than how they originally should be. im actually used in seeing the size shrinking a bit but i found it weird that the ubuntu partition shows 4.76 when it should be 4.5gb. i know its not much different but im just curious to know why..
partitions order: windows - unallocated (-->data partition) - ubuntu (primary) - home folder (extended) - swap
in windows the partitions are shown as: windows xp (31,74gb) - unallocated (50,05gb) - 4,76gb unkown - 24,27gb unkown - 981mb uknown
in gparted: its almost the same, only difference: there is unallocated space (7 or 8mb) between home folder and swap
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Aug 3, 2011
I want to test syn flood attack in my pc
but i dnt know how to generate it, can you tell me
how to generate syn flood attack in pc
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Oct 11, 2010
Trying to install 10.10 netbook edition on my MSI U230 netbook from a USB drive. Keep getting the error "hyper transport sync flood error occurred on last boot" Press F1 to Resume. F1 causes just a reboot and the same thing happens. Anyone seen this error? It happens with both the netbook and desktop version.
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Sep 18, 2009
I have 3 Ubuntu installations & a PCLINUXOS, plus Windows XP installed on one hard disk. I still can boot to each one of them and can mount each one using Ubuntu.
The problem "may" have occurred when I reduced the size of some linux partitions using gparted. I still have plenty of space in each of those partitions.
When I started gparted all of the HD was unallocated. I did that from each ubuntu installation and the PCLINUX installation, plus LIVECDs. All indicated the space was unallocated.
When I did an fdisk -l from a Puppy Linux LiveCD I got a normal start and ends of each partition.
When I tried it from Ubuntu installation or live cd, I received the following types of responses:
Code:
ubuntu@ubuntu:~$ sudo fdisk -l /dev/sda5
Disk /dev/sda5: 28.5 GB, 28566397440 bytes
255 heads, 63 sectors/track, 3473 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
ubuntu@ubuntu:~$ sudo fdisk -u /dev/sda5
The number of cylinders for this disk is set to 3473.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs (e.g., DOS FDISK, OS/2 FDISK) Plus the Windows partition seems to go over its limits.
Since all of my OS installations are still working, I don't know how critical this is. From reading another post, I understand this might be able to be fixed by making some changes in fstab.
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Jan 22, 2011
how to do iptables log to file UDP Flood under 64 packages?
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Feb 21, 2011
Banning the IP is the best way to protect your server but of course, attacker can use another IP and use a lot of your bandwidth until you find and ban the IP. So the only thing we can do to prevent this is, block the packets my iptables length module.
I check the bandwidth usage through "iftop". Incoming traffic is always like 120kb/second and that has to be that way because the traffic enters my server no doubt that it gets dropped by iptables later.
The actual thing what the Ddos ( UDP Flood ) does it that it causes an outbound traffic that eats up like 5mb/second easily and my servers lag. Only if the IP is banned, the outbound traffic comes to an end.
Now I want to use the length module to block it but it just won't work. I've tried the following and shuffled them too but no help.
Code:
iptables -I INPUT -p udp -m length --length 15 -j DROP
iptables -A INPUT -p udp -m length --length 15 -j DROP
Packet length is 15 according to tcpdump:
Code:
19:49:34.504864 IP fms-02.colt.net.belgamanagement.be.56413 > nyc.v1servers.com.20100: UDP, length 15
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Nov 10, 2010
my computer froze solid, and it would not react to anything. X didn't react to Ctrl+Alt+Backspace, not Ctrl+Alt+Del, so I had to turn it off using the power button.
This is the first time my computer freezes like this, the log files did not reveal any HW errors. Is it possible that someone in the channel did not like my level of Java skill, and flooded me to disconnect?
By the way; Im using slackware 13.1 with the default kernel (2.6.33.4) and irssi as IRC client.
I know that if you eg. ICMP-flood someone, the traffic will be denied and, but can it provoke other behavior from the computer?
So my question is; can a IRC flood/DDoS attack cause a computer to freeze sub zero?
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Oct 16, 2010
I run a Centos server that quite a few people have access to. I trust every user on the system, but i've had problems before like one user's account gets hacked and someone starts using my box to DDOS. Each user has their own ip.. And I would like to write a script or use an existing solution (if one exists) to monitor number of tcp/udp connections each minute and see if it's unusually high. I don't want it to stop the flooding or anything, I just want to be notified by email or something.
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Jun 26, 2011
one thing I'm not quite certain about is suitable limit rates for SYN, LOG & ping flood prevention. I suppose it depends a bit on traffic, as well as bandwidth. However, I don't want to limit the former. FWIW, I expect about as much traffic as a country road in the middle of nowhere, and my bandwidth for requests is 15 Mbps (Don't laugh. Content delivery is a pathetic 2 Mbps. That's a residential cable connection for ya...)Of all the tutorials/examples, I chose to go with Rusty Russel's limits, though they're dated 2002. Thus an excerpt of my firewall "script":
Code:
#!/bin/sh
# Saved in /etc/init.d, runlevels 2 3 4 5
[code]...
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Feb 12, 2010
i have just installed Ubuntu,i'am really concerned about security,i have no idea about linux.In windows, i use kaspersky internet security to protect the computer, so any time i want to log on my bank web, i use virtual mode or secure mode,and also virtual keyboard offered by kaspersky,i ve never had a problem,this way i think i protect myself against fishing.
Is there anyway to protect myself from the fishing attack in Ubuntu?
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May 17, 2011
on a Vimeo video in Firefox, and my computer became "partially frozen". The video stopped, but the audio continued to play to the end, but I couldn't clear the video. I pressed ctrl-f2 to switch to my other desktop, but it just brought up a blank screen, and switching back makes no difference.As it stands I have a black screen with my mouse cursor on it (I can move the cursor, yes). I'm new to linux, and I want to know if there are any keyboard shortcuts I could try to fix this. I'd rather not hard reboot whenever I run into a problem, I just don't know the terms to google for
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Jul 13, 2011
I had a problem with Thunar in Xubuntu. As I often work with huge images, memory is consumed generating Previews. Disabling Previews seems to be very difficult in Thunar, as it makes use of external Thumbnailers. Another problem is making a file executable. I couldn't find out how to do that in Thunar. So I decided to change back to Nautilus, which solves the problems. In preferences it is easy to disable generating previews. But I was not able to get completely rid of Thunar. The folders on my desktop still would open in Thunar, although I set Nautilus as default browser. So the problem sometimes is still there. Uninstall is not possible, as it completely uninstalls xfce-desktop. Is there a way to avoid running both browsers at the same time?
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Feb 15, 2011
I'm working on a managed desktop at work with Scientific Linux so I decided to install latest Ubuntu 10.10 on my laptop, an Aspire 6930, and set it up so it dual boots with Windows Vista.
It boots for the first time,everything looks great and it asks me to update some programs.After it does that,I restart and I get a grub rescue message while there was a strange clicking sound coming from the hard disk. I reinstall Ubuntu through BIOS with a CD and I bring the system to the original state.
I can now boot either with Ubuntu or Vista but I don't dare update the programs it prompts me to as I fear it will lead to the same result. It's been like this for the past month and I was wondering if there is a way to know what actually caused the problem in the first place assuming that is has to do with a program that was updated.
Truth is that the specific model has this problem with the hard disk that makes that constant clicking. When running Vista I have a program called Notebook Hardware Control which lowers some settings and stops the clicking.When running Ubuntu, there isn't any. So is there a way to know which program can cause such an error and refrain from updating it?
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Feb 27, 2011
Is it possible to forbid that more then one user open the same file in rw mode? In windows when you open a file that another user is using, there's ad advise and you have to open it in read only mode
I installed ubuntu 10.04 desktop edition on 3 pc (there is not a server-client architecture). I installed samba.(and smbfs)
put the strings:
[name]
comment = ...
path = /...
guest ok = yes
read only = no
create mask = 0777
directory mask =0777
Computers that access to that directory do (on boot, with root privileges)
mount -t smbfs -o username="user",password="pass" //192.168.0.12/name /mnt/cartelladimontaggio
But if two users access to the same file, both are authorized writing on it! So changes made by one are lost when the other save.
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Apr 7, 2011
I use rsyc for synching files that I type with a server and every time I have to enter the server's password. Right now in my .bashrc file there is an alias like this code...
but can't find such a thing in rsync or ssh man pages. Does anybody know what I should do?
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Jun 24, 2011
I hav disabled the password on startup but the default still pops up and asks the password. How can I stop that. I use UBUNTU 11.04
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Jan 4, 2010
I wrote a c console-programme with should output a system beep.But I cannot hear any sound.Which setting of Ubuntu avoid the beep.
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Jan 16, 2010
Why does Windows (7) [over-]write the MBR [pseudo-randomly]? And what settings can I change to prevent that?
Background : I used to dual-boot Ubuntu and Windows-7 on my gaming-laptop, but periodically I run into GRUB-got-messed-up-please-fix-me-again welcome screens. how-to guides on restoring GRUB, but no obvious ones on how to avoid messing up GRUB in the first place. Whats interesting to note; I have another work-laptop that dual-boots Windows XP and Ubuntu just fine (for the past year) and have never run into any GRUB-got-messed-up-please-fix-me-again situations.
My Hypothesis : I have a hunch that Windows 7 writes to the MBR for enabling Restore-Points.
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Jan 27, 2010
What pitfalls are there to avoid when dual booting? What can go wrong?
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Jan 29, 2010
This is the related question in Launchpad:and it may affect to debian-installer configuration (?)How can I do to avoid that in the alternate installation partitioner doesn't appear "ext4" filesystem as the default selection in any step?This could make able to install to an encrypted independent volume, for example, without crashing partman-ext3:
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Feb 22, 2010
Operating System: Ubuntu 9.04
Printer: LaserJet CM1312 MFP
I have an intermittent printing issue that results in part of a printed page containing a horizontal line that spans over two lines. The line is mostly black, with the occasional small break where there seem to be printed multiple characters printed over each other.
Sometimes I print and I do not get this issue. Other times I can print 60+ pages and it happens, while sometimes I get it on a single page being printed.
I'm not sure if this is a driver, printer or cable issue. We've used it through CUPS and we've used a print hub to convert the USB to a network accessible printer to see if that made any difference but it did not.
I have a feeling this has something to do with the print job data corruption.
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Jul 15, 2010
How can I avoid typing a password on every admin action? example when i install a program.
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Dec 15, 2010
I have recently started using Ubuntu, so far I am quite satisfied with the switch in OS. This time my question has more to do with privacy, govt. sniffing of private/personal communications, Internet censorship and what to do about these issues. I live in a South American country where the govt. wants to impose Internet censorship such as the one currently in place in Iran, Cuba or China. They plan to set up a single node for all Internet communications out-going and in-coming. I would not be surprised if they are already monitoring people`s communications illegally.
1. what can be done to avoid being censored? they will be able to monitor my email accounts, facebook, twitter and so on. They want to force the Internet Service Providers and telecom companies to censor their users, since those companies will be responsible for the content of the emails, sms, tweeter messages, etc.
2. What can I do to avoid their censorship of certain contents which are critical of the govt. or contrary to the regime`s views? I need to be able to read what other people are saying beyond the borders of this country. We can`t tolerate living with this ban. Certain contents coming from abroad will be blocked.
3. How can I protect my email and bank operations? Is a proxy server an option? I really don`t know what a proxy server is, how much it would help us avoid govt. sniffing in private matters for political reasons.
4. what additional measures can be taken? is using encrypted messages an option to communicate with my relatives in order to prevent the govt. from reading my emails?
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Feb 15, 2011
I need to check the output of a name resolution, but I configured the firewall of the destination to avoid answering to pings.
Is there any other way to get a name's IP without using ping? (I mean something like $resolv name.com)
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Jul 19, 2011
According to this scary wi-fie hacking article:
- http://www.cnn.com/2011/TECH/web/07/...ntenced.wired/
A neighbor was sent to jail for 18 years for seriously hacking his neighbor:
- http://www.wired.com/images_blogs/th...encingmemo.pdf
What can we install on Ubuntu to forestall such an occurrence at home (given a WRT54G router & 1 Ubuntu computer)?
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Feb 19, 2010
I work on Ubuntu 9.04 and our application requirement is not to go to power saving mode when application is running. I added ServerFlags section to /etc/X11/xorg.conf
Section "ServerFlags"
Option "blank time" "0"
Option "standby time" "0"
Option "suspend time" "0"
Option "off time" "0"
EndSection
This didn't help. Then I tried following commands
gconftool-2 -s /apps/gnome-power-manager/ac_sleep_display --type=int 0
gconftool-2 -s /apps/gnome-screensaver/idle_activation_enabled --type=bool false
I see that it works fine only if I change settings via Settings>ScreenSaver>Power Management in gnome. I wan to do this via script. Can I do this? Which file gets updated when I change display settings via Settings>ScreenSaver>Power Management.
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May 1, 2010
I currently have sendmail installed. It starts as a daemon but I want to avoid doing that. I want to start it manually.Also am a dynamic host.so every time i start my computer my ip changes. I use ddclient to update my records at dyndns.com.but how to configure sendmail in the case of dynamic hosts since it looks at the file /etc/hosts which contains information about the static hosts.
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Aug 7, 2010
Everytime I leave the computer for a few minutes the screen goes black (I think in suspended state) and when I move the mouse it asks me for the administrator password. How do I make it so it doesnt ask me for it after coming back from suspended state?
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Jan 11, 2011
when I click on a volume under places menu I would like only to mount it without opening it on a new nautilus window. I searched on gconf-editor app > nautilus > preferences but I haven't found any option which seems to prevent this behavior.
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Jan 25, 2011
What I need to do is gather a bunch of log files from various directories and move them into one spot. Below shows the directory structure.Quote:
dir1
-a.log
-b.log
[code]....
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