Fedora Security :: Reset The Root Password By Booting Into Single Usermode By Editing Grub
Apr 17, 2009
Being able to reset the root password by booting into single usermode by editing grub. This is a MAJOR flaw. I know it makes no real difference against internet bourne attacks, but even so I must say I found it shocking. The only way I've found to stop this is to encrypt the entire HDD, so noone could get into single user mode without first knowing the encryption key/password.
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Oct 20, 2009
Can someone assist me with recovering/resetting the password for Root via Single User Mode in CentOS v5? I've modified the kernel line using Single, S, and 1 but it appears that these commands are being totally ignored as the server continues with the boot process and displays the GUI logon screen. The server in question is a VM box running on ESX v3.5 U4. The person that created this VM is no longer employed here and I've exhausted everything I know regarding Single User Mode.
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Sep 1, 2011
I have ubuntu 11.04 installed along side windows. And I often share files with windows computers. If I am installing a new package from ubuntu software center, and consquently I have to log in as root to do so, which means I have given the system 'privileges' as the program is being installed, I decide to go open mozilla, and surf suspicious sites on the net. Is it possible in that case for me to get a virus?
When we enter the password for the root user in order to run one program such as ubuntu software center, does that mean that all programs have root privileges for the time being (as the software center is installing the program)?
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Jul 14, 2009
When I go to single user mode for resetting root password, It ask root pawssword for login.The message displayed on prompt is "Give root password for login.On the boot prompt, I select kernel and press 'e' and after one space type 1 for single User mode and then press 'b' for booting.It shows message entering in single user mode but ask root password. Even I tried into rescue mode, but I couldn't ser root password.In rescue mode on prompt, It shows rescue login: I typed root, But when typed 'passwd' foe resetting root pawssword,It shows message unknown user and not authetication.
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Feb 4, 2010
I am trying to set up a webserver with apache, mysql and php on a old pentrium 4 computer. When I tried to setup my MySQL password, I created a password with punctuation in it. MySQL didn't want the password and gave some error about BASH. I tried changing my password again but now I constantly get the error that I am unable to login. I tried all the possibilities with the password I entered before but i just can't login to MySQL anymore. I found some help sites on how to reset your password by running MySQL in the safe mode but that didn't work for me. Can anyone help me resetting my password? Next time i'll use a pass without punctuation Every help is much appreciated! BTW, I also tried uninstalling MySQL with yum (yum remove mysql) and it uninstalled, but when I installed it again the password was still there
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Jul 23, 2009
I am an absolute Linux Beginner who is being required to do a bit of admin work because the boss just fired the old linux admin. Unfortunately, one of our employees cannot remember her password to her email account and as such I need to reset it on our linux server.What I want to check is that this email account is actually a linux user account and I simply will reset the password for it using the passwd command from the root login. Is that correct?
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Jul 2, 2011
i am having some issues with dual booting my SL6.1 and Windows. The situation is that i recently acquired an old hard drive from a non-working computer of mine with Windows already installed (i know the windows is functional, as i tested it on my new PC with SL6.1 currently installed & everything runs fine)
The problem is that after editing the grub.config to include windows, windows will no longer boot after an attempt to install a legit version of McAffee anti-virus software which coincidently was only after the first attempt at running both OS's in a dual-boot fashion. Except past the windows start up screen before the dreaded blue-screen.
Which is weird because SL6.1 OS will still boot & works perfectly fine like always, so it doesn't really make sense.
My current setup is:
Disk 1: Solid-State:
Boot Partition
SL6 LVM1: Root Partition
Disk 2: Hard Drive:
SL6 LVM2: User, Temp & Swap Space Partitions (Different LVM to Root)
Disk 3: Hard Drive:
Windows 7 Professional 64-bit
My guess is its windows MBR. The reason i say this is because the Hard Drive contents of the Windows software still appears intact when accessing the drive from the Linux OS. I don't won't to go through the rigmarole of re-installing both OS's. So hopefully their is a relatively simple solution.
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Oct 20, 2010
I found this on Bee's website. For more info on this exploit there are links there:[URl]..All you have to do in Fedora 13 is enter the following lines in a shell as normal user:
[Code]...
I don't think this can be considered solely an "upstream" problem, because I first tried it in Arch using the same version of glibc, and the final command causes both gnome-terminal and xterm windows to disappear.
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Apr 30, 2010
I am using openSUSE 11.1 and I've lost my root password.The following didn't worked :-
Restart
give parameters " 1"
press e
press b ...
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Jan 21, 2010
I've installed UBUNTU 9.10 on ( windows 7 ) when I was interested to discover Linux, now I began to understand this AWESOME system and I began to get ride of Microsoft " Windows " .. But I face a problem that when I installed It I created only one account with a password, but It's not the root, when I tried to login as root, I didn't success, It tells Failure authentication because of the wrong password, because I enter my account password which I entered when I installed the system, Now I want to know how to solve this ISSUE, how to get the root password or how to reset It
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Sep 21, 2010
for resetting the root user's password. Actually, I am using www.linuxzoo.net for online practice of Linux and have MySQL installed on it. But I forgot the password I set. There was no password by default set for the root user. So, I just trying setting a password last week. Now I am not getting what I did.
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Jun 4, 2010
I am using RHEL 5.4 my root password is getting reset after every reboot.every time i had to change the password from kernel to access the root.i am unable to find the where the problem is.
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Jun 2, 2011
I have to recover / reset root password. I do not have the 5.3 cd, can I boot with the CentOS-5.6-i386-LiveCD.iso [URL] and follow the recovery procedure outlined below [URL]
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Sep 7, 2010
I have forgotten my root password for MySQL, what can I do to recover it, I've found a few guides but they don't work on the newer versions of Ubuntu.I am running on Ubuntu 10.04 server so MySQL is an upstart job so the methods I've seen with launching it without the access checks haven't worked for me
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Oct 14, 2010
I have forgotton my root password for mysql. I followed some instructions on a website and now I am not sure what i have done?Basically, when I now try and start mysql I get a notification that i have converted the init script to an upstart. I dont know what this means.
Since the script you are attempting to invoke has been converted to an Upstart job, you may also use the start( utility, e.g. start mysql mysql start/running, process 20301.
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Oct 6, 2009
Does anyone knows "How to recover a root password using bootable fedora Linux 11 disk?
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Oct 25, 2010
Yesterday, when I was installing Redhat Enterprise 5.4 on a HP server, I asked myself "how can I regain my access to the server if I happen to forget the root password?" I knew there must be a way. I consulted with my friend "Google". I'd like to share it here as my 1st post (too bad that I'm not allowed to paste screenshots)
1) Boot up the server, when you are at the "Red Hat Enterprise Linux Server..." entry, press "e".
2) Highlight the "kernel /vmlinuz...." line then press "e" again.
3) Type the word "single" to the end of the line (with an empty space before the word single). Press Enter.
4) Press "b"
5) System will boot. When you get the prompt "#", type "passwd" to enter in new password for root.
6) Reboot the system. Done
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Jan 12, 2009
how to reset a root password after inserting a live cd,ie . i need to reset my existing ubuntu root password, other options all i tried its gud , but need to knw hw to do this while having a live cd and resetting it !
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Sep 21, 2009
what does one do when he forgets the root password ? i still have a terminal logged in as root how can i change the password in terminall
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Nov 14, 2009
I have been experiencing harassment with my websites being hacked so pardon me if this is an over-paranoid question.
Just recently started on FC11 after having abandoned Fedora for CentOS for a few months. So glad to be back, but...
I have been getting notices about security updates. When I click for the update, I am not asked for the root password and the update occurs.
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Jul 16, 2011
I forgot my root password for mysql, and after some searching I found several solutions to fix it. But none of them seem to work.I tried this article http://ubuntu.flowconsult.at/en/mysq...root-password/ with starting mysql with the --skip-grant-tables option. The problem is that nothing happens, it just hangs.Also tried the the --init-file option, that one runs fine, at least it returned to the command line. But the sql query in the file to which it point doesnt seem to do anything. The password wasn't changed to the one I specified in the sql file.Any idea what could be going on here, and how I could fix it?
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Jan 12, 2009
It seem like unix abit annoying every time you log in you need to password can I disable it
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Jan 27, 2010
Can't seem to do it, wondering if anyone knows how? Normally there's something in sshd_config that can be switched to true or yes to allow root login but I can't see it in fedora 12.I can login via root at a terminal no problem, just not via ssh, I get access denied every time. Also, I need to login using password authentication.I've done: 227169 but that's just for GUI which I don't really need since I rarely ever log into the GUI.I have also searched through here and mostly only found info such as above, how to enable root login for GUI, or billions of posts about how logingin as root is bad but I cannotswer to my question.DISCLAIMER: Please do not reply to this thread if all you can contribute is the question of why I need root or to put some message telling me I can do everything using su, etc, etc. Please only contribute if you can answer my question. A: My machine and a valid quesiton. B: Spirit of Linux is open, not restrictive
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Jul 29, 2009
I am new to Fedora. I know my top probably already been posted somewhere but I just could not find it. I just installed Fedora 11. But my root password does not work (I guess was my fault to type wrong in the first place or some type of short term memory lost). I looked at the root password recovery procedure which involves select single user at GRUB page when booting. But for some reasons, Fedora 11 does not boot into GRUB. I tried Alt+CTRL+F1, F1 or Shift, none of those gives me Grub screen.
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Apr 9, 2011
I have recently installed Fedora 14 on a new computer we presented as a gift to my sister-in-law. She is new to Linux. Although I've used Fedora since Core 1, I'm no expert on security issues, and this baffles me. She's doesn't know how to change the root password, so why doesn't it work any more? She discovered the problem when attempting a yum update from a terminal.(1) How could the root password have gotten changed? How likely is it that someone got onto her system through ssh, made a lucky guess on her root password, and then changed it? Are there robots that do this?
(2) The firewall is enabled. I have it set up as follows: (a) under "Trusted Services," only ssh is checked (I need to be able to get in remotely this way); (b) under "Trusted Interfaces," I have eth0 checked (I need to be able to use VNConto her desktop).Question: Are these settings giving ample protection? What settings would be recommended to protect her system while at the same time allowing me to access it through ssh and VNC?
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May 8, 2011
in ubuntu 10.04 how to get into single user mode with out entering the root user password
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Jun 6, 2010
I have an old laptop that I installed EasyPeasy Lucid on. I have never used Grub2 as my other Ubuntu installs still use Grub Legacy. I have studied all the tutorials which instruct that the grub.cfg file should not be edited directly.This old laptop has one of the dreaded Intel graphics chips for which the kernel automatically loads the i915 module. Of course (like a multitude of others with Intel graphics and Lucid) I booted into a black screen but knew the workaround was to enable mode setting through grubI used the
Code:
i915.modeset=1
and added it to /etc/default/grub line GRUB_CMDLINE_LINUX, just after "quite splash", just
[code]....
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Jul 13, 2011
I followed instructions to enter single user mode by adding single at the end of kernel line but after that it doesn't ask for root password but brings up the sh# prompt. Isn't that supposed to be insecure? I understand for this the grub password can be applied but even after adding "single" it should ask for root password..or it should not..??
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Apr 3, 2010
Is there a program that allows me to password lock a single file or folder?
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Jan 21, 2011
I updated the kernel to 2.6.35.10-74.fc14.x86_64 and had to reinstall and rebuild the kernel module for my ATi driver as usual, so I edited the kernel arguments at the grub splash screen so that I could boot into single user mode and install the driver (i.e appending the relevant line with '1'). The interesting thing is, the system booted directly into single user mode as root when the system started up. No password was required.
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