Red Hat / Fedora :: Fill 2TB /dev/sdxx With Random Data?
Jul 5, 2011
If this post is correct [URL] I can expect that it will take more then 16 days to fill my 2TB partition from /dev/urandom. That's not workable for me. dd if=/dev/urandom of=/dev/sdxx has been running for 36 hours, and I need to finish setting up the filesystem. But I also need to make a "professional effort" at encrypting the partition. I am supposed to fill the partition with random data, to strengthen the encryption for a LUKS partition. It seems that if the bad guys get the drive, they have much more time to try and crack it, then I have to encrypt it. Ok, so I can try Code: sudo /sbin/badblocks -c 10240 -s -w -t random -v /dev/sdxx How long can I expect badblocks to run on a 2TB partition?.
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Jul 5, 2011
If this is correct [URL] I can expect that it will take more then 16 days to fill my 2TB partition from /dev/urandom. That's not workable for me. dd if=/dev/urandom of=/dev/sdxx has been running for 36 hours, and I need to finish setting up the filesystem. But I also need to make a "professional effort" at encrypting the partition. Ok, so I can try
Code: sudo /sbin/badblocks -c 10240 -s -w -t random -v /dev/sdxx So, what is "10240" doing there? Yes, I rtfm, "is the number of blocks which are tested at a time", but is that for the partition size? If so, then I would want to increase it to 204800 for a 2TB partition, right? If not, what should I do?
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Oct 17, 2010
I was using dd if=/dev/zero of=/dev/user name/wipe.conf however i got a message that my hard drive is full.
lots of this is scary - dangerous. what is the best way to fill in random or zeros in deleted files without the hard drive filling up ?
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Jun 1, 2009
I just discovered that my server is sending huge amount of data out at about 1Mbps. My immediate thought was the deluge bittorrent client, however it is supposedly not running (and a check confirmed its total active torrents was set to 0). I turned off the network and went in to Firestarter to set the outbound traffic to restrictive, turned on network again and no more data was sent. A look in Firestarter / Events showed a long list of random ports being used (see further down). How can I identify what program is sending all the data?
In Firestarter it doesn't really say much more than the port. Not sure if it is some misconfigured program or a malware/virus. I just got my ADSL connected a few days ago, and before that I used a mobile broadband (3G) as I just relocated. During the period I used the 3G the server might have been without firewall for a few days and it was also at this time I discovered an increase in network traffic (but I didn't really pay much attention at that time). I am running Fedora 10.
List of events from firestarter, my server is 192.168.1.100:
Time:Jun 1 16:48:12 Direction: Outbound In: Out:eth1 Port:39435 Source:192.168.1.100 Destination:58.208.xxx.56 Length:129 TOS:0x00 Protocol:UDP Service:Unknown
Time:Jun 1 16:48:12 Direction: Outbound In: Out:eth1 Port:6990 Source:192.168.1.100 Destination:112.94.xxx.212 Length:129 TOS:0x00 Protocol:UDP Service:Unknown
Time:Jun 1 16:48:12 Direction: Outbound In: Out:eth1 Port:2973 Source:192.168.1.100 Destination:118.93.42.xxx Length:129 TOS:0x00 Protocol:UDP Service:Svnetworks .....
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Sep 22, 2010
Once random data is obtained by means other than a pseudo-random number generator, what software is available to measure the entropy or quality/randomness of the data?
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Jan 11, 2011
Given the following data structure: Quote:
[Code]...
What is the minimum possible MySQL query to get a random data selection that includes each Index number only once and ordered ascending. The maximum index number is known. For example running the query should get the following data: 01, 06, 07, 02. Running the query again, you may get the same data or another possible combination like: 01, 05, 07, 04. Of course you could run a loop for 1 to max_index and process a random ordered data selection until the next index number is found. But I think this will result in too many database access. Also you could run max_index queries to get all IDs that correspond to the given index and randomly select one ID for each index.
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Mar 9, 2011
I want to view a hard drive and see if it has all zeroes, how would I do this? I want to view a hard drive and see if it has all random data, or random data mixed with zeroes. How can I do this? I prefer to do all this in linux if possible without a gui...so looking for any cli tools to view with.
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May 30, 2011
I am trying to install the bucktooth gopher server on a Windows xp laptop. I have cygwin 1.7 installed, and I recently installed the xinetd and perl packages. I successfully (?) configured bucktooth, but I have had trouble with the connection cutting out partway through (partial directory listings, half-blank pictures, etc.). I used tintin++ to get the connection's data directly, and found that in addition to occasionally missing lines, some lines are duplicated.
I then ran the bucktooth server directly (to bypass xinetd), and found that the server was giving consistent, correct output. I then added a test service to xinetd (m4), but after connecting to this test service (through tintin++), xinetd would respond with one line of unexpected data (such as "gf" or a line from a recent bucktooth directory listing) and close the connection. Could this be a broken xinetd? My xinetd configuration:
[Code]...
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Apr 10, 2009
I'm going to do a permanent install of fedora 10 soon, within the next couple of days.
1. When installing it asks if I need to log in as NIC, something about networks. What would that be about?
2. Is there any way to resize the screen to fill more of the monitor? Right now it leaves about an inch of blackness on the let side which is more than other os's that I've seen.
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Dec 10, 2009
I'm using OpenOffice from repo. In Calc I want to fill in 2 cells under eachother, consisting of a name, space and a digit. Then, after selecting both cells, drag them down to get a list of this name, with only the digits being different. When using OpenOffice from original download, this gave no problem. Now however, I'm presented with a Fill Series window that gives me some options like Direction, Series type, etc. And whatever I fill in, it says �nvald value. How can I get rid of this Fill Series window. The Help function in OpenOffice doesn't give a clue on Fill Series.
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Feb 9, 2010
[URL] and then take vid and open that in whole screen. Since is it this machine why I got blank if I am try to expand it to fill screen.
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Jan 5, 2010
What would be the best way list disk and partitions in the fstab file?
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Jan 19, 2010
I'm looking for a script that copies a random .jpg from a random folder in my ~/Pictures folder to my ~/temp folder with a standard filename. This file will then be displayed in Conky. I can fix the last part, but I cannot find a way to do the first part.
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Mar 25, 2010
setting up my dual monitors. I can get a continuous screen but the screen does fill the lcd screen all the way. I have dove in to xorg. I'm on fedora 12 .
[Code]...
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Jun 26, 2010
What is the easiest way to make it so that these transferred files will not be completely locked out and require me to go and change them one by one sohat i can access them without having to go root. Also the "apply to all subfolders and files" doesn't work. Also trying to set the SELinux rule to "userspace" doesn't do anything else. Basically i was trying to do just that transfer my $home folder over to fedora but now it's being a bit odd towards me with making everything require root access and not letting me read/write all files and folders within them.
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Dec 18, 2009
I just installed Fedora 12. Now i've seen a few other threads but they seem to have all the conclusion that its the Nvidia drivers at fault. Well i have an ATI Mobility Radeon 3400 series. I can login, and navigate for a little bit, then it just randomly freezes. I've booted to both gnome and KDE, kde freezes almost immediately w/o letting me navigate much. Gnome takes a bit and then freezes on me. I managed to login once and go like 6 minutes then i thought it was worked out, rebooted and boom, froze up again. I can still move my mouse but can't click or use keyboard. Ctrl+Alt+Backspace doesn't work either .....
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Dec 31, 2009
About a week after I installed F12 on a brand new system, a friend came over and went on to play poker on facebook. At some point he yelled that the PC froze. I was working on another machine at the time and tried to ssh to the supposedly hung system, but couldn't; Except for playing poker he had audacious open and about 3 seconds of the song that was playing at the time of the hang, kept looping. Neither Ctrl+Alt+Backspace nor any of the Alt+SysRq combos had any effect whatsoever, so I had to press the reset button (and I have to say this was the first time I had to do so in linux after almost a decade of using it, save for a hiccup with my first gentoo kernel).
The system usually freezes if there are two or more sound streams, but that is not always the case. The best way to get the system to crash is by playing something in audacious or rhythmbox while seeking through a video in mplayer or vlc or having flash content appear in firefox (I am using adobe's latest 64-bit flash plug-in and have been using it without any problems -though on other systems- since F10). Also most but not all the times the system is going to hang, there are a few skips in audacious every ~10-30 minutes. I've been getting the lock-ups with every kernel released so far.
My system logs don't contain any useful info after each hang; there are however certain problems mentioned in syslog which I thought they could be relevant, but they always appear whether the system works fine or not, namely the following:
Code:
I used to get a lot more of these with previous kernels:
Code:
Code:
This one appeared every now and then until Dec 25:
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And this one is always there:
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Finally, at every boot I get this from abrtd, but it doesn't seem to be related:
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Yesterday, I devoted the entire day to hunting down the culprit, but I couldn't get the system to hang; I had rhytmbox, audacious, totem, vlc, mplayer and vlc all playing music and videos simultaneously from local disks, network shares and through upnp, I got myself a facebook account in order to play that zynga poker thing, I upgraded alsa-lib to 1.0.22 from updates-testing, rebooted countless times, but the system didn't hang nor did any of the above messages disappear.
Today as I was browsing through some web pages, one of which had an interactive flash ad, while listening to music and the system froze again.
System specs:
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Jun 11, 2011
I have a pdf form that came from open office conversion to pdf. It has some information filled out in it already and I don't want to lose that by doing anything that overwrites it or loses something in a conversion, etc. Also, it is two pages so I can't print it out, fill it in and then scan it because I would end up with two files instead of just one then.
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Mar 31, 2009
I have a new IBM x3650 that I am trying to get installed and running. However, it seems to experience random segfaulting. The system has ECC RAM and I have taken a look at the EDAC reports from the kernel, but as far as I can tell there is no error.This is a critical system I need to bring up, so I can't have it act flaky like this. Software is up to date. [URL]
Example output:
Code:
__ratelimit: 1 callbacks suppressed
ld-linux-x86-64[7676]: segfault at b33000 ip 00000000003b557b sp 00007fff13789c18 error 6 in ld-2.9.so[39d000+20000]
ld-linux-x86-64[7699]: segfault at 62ddbb ip 000000000062ddbb sp 00007ffffa0ab520 error 15 in toc2cddb[62c000+9000]
ld-linux-x86-64[7939]: segfault at 161004011d5 ip 00000000001ea1f0 sp 00007fff1eeb14f0 error 4 in ld-2.9.so[1e2000+20000]
[code]....
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Oct 13, 2009
I've installed fedora 11 (GNOME) on my laptop. It sometimes reboot itself. The screen goes black and reboots(sometimes just turn off!) Palimpsest Disk Utility reports HDD bad sector but when I run memtest, everything looks fine. Windows xp does not have this kind of problem before I use fedora
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Oct 24, 2009
My mouse still moves, but it doesn't have any effect clicked. My keyboard doesn't work. Sugar doesn't hang at all
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Apr 11, 2010
I've installed Eclipse PDT with yum and httpd got installed as well. The problem is everytime httpd starts it chooses different (random) port and refuses connections to other ports like 80 (displays 403 forbidden error). That's really annoyng because I have to launch eclipse and open file in "PHP Browser" to get the right port. It also makes me unable to setup vhosts properly (i think). How to force apache to stick to the 80 port? Heres my httpd.conf: [URL] The only things I've changed there is added vhost
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Mar 14, 2010
Running Open Suse 11.1 with KDE 3.+ using screen resolution (trying to) 1280x1024. I can't get my wallpapers to fill the desktop, they are tiled sometimes and I can't change them. One other thing is I am having trouble with the screensavers, they won't start, and I like to delete some of them?
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Dec 17, 2008
How do i fill a file with <n> bytes at a given value ,for example 3?
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Nov 6, 2009
It's been freezing on me like you wouldn't believe today, and I think it has something to do with the load put on the CPU by various sites. The trouble is, I need to access a few of these sites to do my work. WordPress is one of them. I've had to restart the computer five times via SysRq keys since when these freezes happen, I can't Ctrl-Alt-Backspace out of it (even with zap enabled) and I can't bring up a terminal or Alt-F2 to kill process. I can't switch processes, windows, or anything. Firefox just sits there and laughs at me as I threaten to bust the screen in half.
And the real funny thing is, people actually say this is a better browser than IE. I never had these problems on Windows.What can I do to stop this? Do I just have to switch to another browser?
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Jan 4, 2010
I am using Fedora 12. I am able to connect to my wireless network (95% of the time at least) on start-up automatically, however after anywhere between a few seconds to a few minutes later it cuts out and will not reconnect. It appears to be that whenever it finds next doors network it disconnects from mine! I have set the channel to 9, and my neighbor's is on 1. I have a USB N+ adapter, and a G+ MIMO PCI card, however do not know which is being used to connect with.
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Feb 17, 2010
My firefox (Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.6) Gecko/20091216 Fedora/3.5.6-1.fc11 Firefox/3.5.6) on Gnome 2.26.3 will randomly crash, without any errors. /var/log/messages & /var/log/Xorg.0.log doesn't show anything that caused any errors. And it doesn't matter on which website(s) I'm busy with, it will just crash.
My PC has:
Intel Pentium(R) Dual-Core E5200 CPU
4GB DDRII Corsair RAM
3x 160GB SATAII HDD
Asus Nvidia 8800GT graphics card.
I have updated to the latest nVidia drivers
[root@Rudi-PC ~]# dmesg | grep nvidia
nvidia: module license 'NVIDIA' taints kernel.
nvidia 0000:01:00.0: setting latency timer to 64
[code]....
This is on Fedora Core 12 x86 I have disabled the only 3 Firefox plug-ins that I installed yesterday, but this problem has been looming for a long time. Something interesting that I picked up is that Thunderbird will close randomly (very seldom though) as well, so I don't know if it's Firefox specific though.
I have picked up that it happens more often when my PC's memory usage is above 2GB RAM, and memtest86+ didn't indicate any memory problems. If I have less tabs open, it happens less often, but the more tabs I have open, the more often it happens. At the same time, on the same PC, when I'm in Windows XP SP3 (dual boot), I can have many more tabs open as well as Thunderbird, Quickbooks, Photoshop CS3 and some other applications, and it doesn't cash.
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May 20, 2010
I just installed 64 bit Fedora 12 on a Dell Latitude E6510. When I am typing, the cursor sometimes jumps to a random place. This is very annoying, especially while coding.
This was not a problem with Fedora 11 live or Windows 7 (dual boot).
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Aug 7, 2010
I'm getting very random full system freezes with F13. The keyboard stops responding completely. Sometimes the mouse (and the mouse only) still works. I those cases, I can log in via ssh, kill kdm, and everything goes back to normal until the next freeze. However, in most cases, I have to do a hard reboot. Sometimes the system goes on for days without a problem, and sometimes it freezes 10 times in a day (It's in one of those days that the bug-screen saved me from flying out the window). I also had this problem on F12. I'm not sure if its video-driver related as both nvidia and nouveau experience this behaviour. In fact, I'm not at all sure what the cause may be.
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Apr 10, 2011
has someone tested new beta of Skype on Fedora 14 ? Have you noted some crash during the account connection ?
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