Security :: User Reappears Even If Operating System Is Reinstalled And 3x Formatted
Jun 5, 2011
A few month ago one of my computers ( hp thin client ) was compromised. I reformatted the harddrives and reinstalled MANDRIVA 2010 .
After a few days I had been prompted at login with a username robert
even if there was no more user robert ( I changed to use rob at new installation )
So I became nervous and formatted again 4x first ext3 than swap than ntfs than
reiserfs. I kept this computer out of network ( used as standalone no LAN no WLAN )
I reformatted all my usb sticks and external hds. And now a few days ago the clou, robert was back again at login !
But there is no user robert in /etc/shadow how to stop him coming back ?
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Mar 16, 2011
Quote:
In this video, Tim Armstrong, a malware researcher at Kaspersky Lab talks with Ryan Naraine about the strengths and weaknesses of the Android operating system. Armstrong looks at strengths and weaknesses of the open-source platform and warns about the risks associated with jailbreaking/rooting Android devices.
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Dec 11, 2010
I've come across this rare issue, I have a friend that uses some software that is particularly slow in Windows 7, the best compatibility is in Windows XP, I told him to make a partition and have both OSes in the computer, at which he replied: "Could I have a different OS for each user?", it seemed like a good question to me, so is that possible?, suppose that I login and it boots me to Vista, then I loggout and Linus Torvalds comes and logins and boots him into Ubuntu, he gets bored and logs out, afterwards my friend comes and logs in, booting into XP, summarizing:
The operating system that will be loaded will depend on the user that logs in.
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Jan 13, 2010
Will a Linux operating system lose data during a power failure as does a Windows operating system?
(If yes.) This has not come up before but I'm going to be doing some work I don't want to lose.
Could you either point me to a backup tutorial or give me the quick overview of preserving stuff with Ubuntu?
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Dec 31, 2010
Http://www.breitbart.com/article.php...show_article=1
I just read the above article. Someone in Communist China has found a way to create a virus in the Android operating system. Android is a Linux fork.
It looks as though the virus is quite specific: it only works on certain apps downloaded from Communist China. I'm hoping that the Google Android version of Linux is different enough from the standard Linux it was "forked" off of that it will be of no concern to we desktop Linux users.
Does this mean that we Linux users must begin running anti-virus software as a continuous process now? What is the chance standard distros will be affected?
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Jul 24, 2011
could any one tell me about the uses of linux operating system compared to windows operating system
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Sep 26, 2010
I often get responses from people who first say: "Are you sure? You want your network to be exposed to the outside world?" I am not experimenting on a Production Server of NASA or any Security Concern Department. Friends, there is no harm in experimenting on your personal computer or on a test computer which is isolated from the production environment. Look at hackers! What do they do? If they don't know how security is breached then how would they come up with security measures?
If my question reads... "How to let any user perform Administrative Tasks on a Linux System irrespective of his/her privileges on that particular system?" then I would not get the right answers in the first place. They will say... "You are letting everyone destroy your system... are you sure you want to do that?" My question is: Why should we restrict ourselves from experimenting even if it sounds weird to other people?
I give you an example where it is desirable to let an unprivileged user perform certain tasks. You want to know if there are any employees in your office who are storing videos in their home directory and filling up the disk space to a great amount. You have a department called "Command Center or Data Center Operations or Help Desk" call it whatever you would, whose work is to monitor such activities, and you create an account "monitor" for them to monitor such activities but they are not able to do them:
[Code]..
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Oct 19, 2010
i am investigating on solutions to trace a file deletion on a computer( Linux O/S).i also need to determine weither after a file deletion or download on a computer, the computer clock had not been modified. In case a file has been downloaded on a computer and then transferred to a removable device, i need to find out the file activity. i mean i should be able to tell that the file was downloaded and transferred to a device with possible specifications.
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Sep 8, 2010
Is there any way in linux that user & group security can be set ?
excluding the owner & group permissions.
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Mar 3, 2010
I'm using Gnome and I'd like to still have the ability to reboot/shutdown from one particular account as well as root. How would I modify the chmod command to add this ability?Also, I have a few users who just will hold the power button in to shutdown the machine. How can I keep them from doing this?// Pruned from the vintage 2007 Prevent a non-root user from shutting down, rebooting or suspend the system thread. Please create new threads instead of resurrecting ancient ones.
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Aug 10, 2010
I have a problem with sshd daemon on a target linux system:The system has only one user (root) without password.The sshd_config looks like:
Code:
Port 22
Protocol 2
[code]...
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May 12, 2011
I am looking for recommendations on books and studying material for a person starting from zero and wanting to become a very competent user of Linux operating systems. From learning the very basic commands and use of the terminal to contributing to the development of a distro.
Can someone please suggest any books or authors that would be suited to start a program of this sort? (It would be preferable if they are available in hard copy format but e-books could also work)
I would also like to have an expert opinion on how much time you think it would take to get from novice to expert in the Linux world if devoting roughly thirty five hours a week. I intend to compile a step by step curriculum from personal experiences.
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Oct 1, 2009
There were some files residing on my ext3 file system, using Ubuntu as my linux distribution. Yesterday I formatted the hard drive using a windows install CD, rewriting it with a new NTFS partition. I'm willing to restore my personal files deleted due to this format.
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Mar 16, 2011
I have purchased a DLink Sharecenter Pulse NAS as my PC failed. I wanted to put the two SATA drives in and extract the data before formatting to use as JBOD or RAID. However, before I managed to access my data, the setup software started formatting the drives. I switched it off immediately.
Purchased a SATA to USB2 lead and connected to my work laptop but I cannot see the drive(s). Used Partition Magic and each drive has 3 partitions - of which show about 74GB as used and 2 x 512MB as not. Looks like the drives have been partly set for Linux but the format was not comlete. Have tried to use explore2fs to read them but I cannot access the 74 GB partition only one of the 512MB partitions.
I'm a bit stuck now - any one got any ideas how I can get my files off the 74GB partition before I put them back in the NAS to format.
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Sep 11, 2010
I have installed Suse on my Windows Vista 64bit machine a couple of times, but the last time I did it - after a disk change - presented some unanticipated problems. Prior to install, Windows Disk Management (whose output I was unable to paste into this question) showed that my disks were laid out as follows:
[Code].....
Disk 0 is a Seagate ATA drive, while Disk 1 is a Western Digital Ext HDD Usb Device. Looking back, I think I should have carved out a partition after M before installing Suse, but I was uncertain whether to make it a logical one or a primary, and in the past the installation has taken the 25 or so gig it needed from the last defined partition on disk 0. This time, however, it went after disk 1, and reformatted the entire drive, deleting about 300 gig of user data, including my system backup. What really suprised me is that it took up the entire drive: 2 gig for the swapfile, then a 20 gig partition, and all the rest for the third partition.
This is not what I would have expected. I especially would not have expected the installation to re-format user data. In any case, I did not want Suse on disk 1, so I reformatted the drive and then used my Partition Manager to rebuild the boot Mbr. So now, I am able to boot into windows, do not have Suse on my machine, but have lost critical data. My disks are now back to the way they were when I started (see above), except that drive F is now all free space, except for my latest backup. My question is how do I ensure, when I reinstall Suse, that it will choose disk0 for the installation and will not overlay any of the data that I have on that drive.
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Sep 19, 2010
Currently my pc is installed with windows os , but i want to use linux (ubuntu)os in the same pc along with windows os .
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Aug 14, 2010
How to install two linux operating system when i am using the windows xp
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Sep 2, 2010
I got a new laptop today and the first thing I did was to install Ubuntu as a dual boot with Windows 7. Everything seemed to work the first time I loaded Ubuntu after installation, and Windows also seemed to work. Then, Windows Maintenance said there was possible disk corruption, so I restarted the computer and now I get this error when trying to load. After reading around about similar problems I think it might be a problem with the grub bootloader. It is 64-bit if that makes a difference.
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Dec 12, 2010
Ok, I have a Gateway Solo 5300 and I want to use it as a test server (install Ubuntu Server 10.10 and everything else after that.) The problem is I shut down the computer after it deleted the hard drive clean through installation and now I have to network boot because its old. What do I need to do that?
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Mar 29, 2011
i planning to use ubuntu server as my operating system so that transparent proxy can be install using squid. i know that, ubuntu already has their own firewall that is linux ip table and but i want to use independent firewall that is pfSense since i need to install 2 transparent proxy in a network..see the diagram for details [URL]
is there is any possible, if i just want to use linux iptables at each transparent proxy server rather then using a independent firewall?
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May 17, 2011
The issue I've been having is vague so I'm unsure if anyone can help me but it's worth a shot. The other day I was booting my laptop and this is what ended up happening and has continued to occur on successive boots:[URL] Each time it boots this is how the screen is characterized. For example: [URL] After this, continuing the boot process, the screen does this--which makes sense since the Kubuntu boot screen is this color and this where it should typically appear (I installed Kubuntu some months prior to this issue.): [URL]
After this screen, the monitor goes blank and becomes unresponsive. It usually flashes to black and then appears to turn on--becoming a slightly lighter shade of black.
Then, nothing. I can't go into tty. I've tried booting with a live CD but the issue persists and hangs, saying: soft lockup cpu 0 stuck for 61s. I've tried taking my laptop apart but I'm not familiar enough with hardware to do anything productive.
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Jun 22, 2011
Is there any 32 bit operating system emulator (like a bridge) that I could easily use those packages or software that can be installed on a 32 bit operating system easier? Something easier than emulating another Ubuntu using Virtualbox.
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Nov 22, 2010
Assume I have a computer on which I want to use ubuntu for a while (single boot). Assume also that in about six months I want to give this computer to Mr. X, but I do not want Mr. X to know that I have been using ubuntu. I don't want to install anything over top of ubuntu, I just want the computer to be completely (or as nearly completely as possible) blank so that Mr. X cannot infer what I've been doing on it. The trick here is that I can't use operating system x_{1} to delete operating system x_{0}. I don't want Mr. X to know anything about which OS I have been using. Mr. X, by the way, is a sophisticated computer user but not particularly interested in tracking me down. Once he sees that the computer is blank Mr. X will just install his own operating system and everybody will be happy.
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Sep 23, 2010
why the operating system is not using swap.I am using Fedora Core 13, it did have 4GB of ram, all of the ram was used. performance was poor. I used free and top to check if it was swapping - according to both, swap was NOT used at all. Never the less, I upgraded to 8GB and performance improved a lot.However, once again, free and top state that ALL the ram is utilised, yet NONE of the swap is utilised.
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Feb 13, 2010
What is kernel in Linux operating system?
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Apr 4, 2011
I have a server HP proliant and installed Redhat 4.3. server has only one HD as another was Bad and no RAID configuration. after 2 weeks I shutdown the system and when start it is giving the error - operating system not found?
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Jul 13, 2010
I am wondering which operating system is better for web development between Mac, Linux, and Windows? I want to code in HTML5, PHP, MySQL, and also use AJAX.
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Aug 1, 2011
Title says it. I tend to be a pretty zealous tweaker, but I'm not sure what caused this to happen.
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Jul 13, 2010
I've installed Fedora 13 with XFCE as the desktop environment. When I login from the GDM, the screen goes black for a bit, then it just switches back to the login screen. I've booted into runlevel 3 and logged in, but I'm not sure where to look now.
[Code]...
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Apr 16, 2011
I am new to this forum. Today morning I installed "skim" program which i used for chinese input. when my sytem was restarted for the second time, it went inside but the GUI login screen reappears even after giving the correct password!
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