CentOS 5 :: Recover / Reset Password For Root Via Single User Mode
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.
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]
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..??
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.
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.
Still working scanning results, this time with DISA's SRR scripts.More than one scanning package complains about;The UNIX host is bootable in single user mode without a password..So, I assume in /etc/passwd there is an entry that corrects this?what is the specific syntax and where does it go ?
I need to recover the root password or reset it. For this, I am trying to follow the following steps to get into the single-user mode & where exactly I am getting stuck: 1. Reboot the machine2. Press <esc>3. At the boot loader screen, i have 'Red Hat Enterprise Linux Server ($version info)' highlighted. 4. Simply pressing 'e' (for editing) does not work (does nothing). 5. I have the option to press 'p' to enter boot-loader password and then go into the single user mode.What if I don't know the boot loader password as well & I want to get into the single-user mode WITHOUT using a boot CD? Is this possible? If so, please share the procedure to do so.
I want to fix my disks with fsck but using sudo init 1 is not allowing me in. It shuts my services down, then gives a "Give root password for maintenance" prompt. I've tried my password, but it rejects it.
I have a system with a fair amount of software on it. The system stopped working due to a hard drive error. The system have 5 hards drive ( 1T). I need to get into single user mode (maintenance) as some how I messed up the root password. When starting up I get the time out screen press esc and it takes me to GNU GRUB version 0.97 screen In this screen there are 6 different lines
At least I think it's called single-user mode. I don't have a GUI for my CentOS install. It boots up to a terminal. The text is too big though. Is there any way to reduce the text size?
When I start my ubuntu linux system it automatically logs into a user (not root) in graphical mode and it does not asking for any password. when I try to go to the command prompt the password is required. How do I give password for my user. The provider installed the system and not me..
I just tried ubuntu 9.10 in recovery mode i came to know that i can change root passwd without knowing the password then i can change password of every user by logging in as root
My linux workstation recently crashed. After rebooting, Linux (Red Hat 5.3) will not boot properly and automatically went into emergency mode or recovery mode i think. I can still see my /home/user/ and all the files inside.I boot from CD to rescue mode and tried mounting read-only the /dev/sd5 which contains the files in the crashed hard disk to try to copy out my files but mounting was unsuccessful (invalid argument). I checked the filesystem type using fsck -N /dev/sda5 and shows it to ext2. i tried to mount another known working hdd and was successful.
My question is why in emergency mode, the crashed hdd is able to be mounted automatically as read-only but cannot be done in rescue mode thru a bootable CD?Is there any special mount options used in emergency mode?I also cannot copy out in emergency mode booting from the crashed hard disk as everything is read only.
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?
I forgot the root passwd for linux (via the "single" mode) and, according to all confirms, did so successfully! I then try to log on to Centos as root, and I can't....it says "incorrect passwd"! So then I log on as another, regular, but not root, user, with that passwd, and boot up into Centos. if I try to "su" to root, with the new root passwd, again it says its incorrect. there is no "system admin" passwd set. I checked!. I need root access within Centos!
I have a new CentOS server install. I am trying to connect from a windows xp box using putty ssh. I can get as far as putting in the password for root user and then it tells me access denied.
Ubuntu is installed in dual boot in my machine. I created only one user and unfortunately I forgot the password. is there anyway to recover this password or better have the root password?
The grub menu seems to be gone in 10.04, and the computer boots in 2 seconds. It's great that it boots fast, but there has to be some way to specify boot options?
/etc/default/grub says the timeout is 10, but that doesn't seem to be the case.
what things can i do in single user mode?is there a guide out there can help me out how to navigate in single user mode?in links that focus only on user user mode?being in single user mode in other istro all the same? debian, fedora, suse. etc
I've created Oracle Enterprise 5 Virtual machine. It was running fine but not sure what went wrong and now when ever I reboot the machine, it goes to single user mode. If I enter "init 5" command it boots to multi-user X11 mode without any problem.I checked inittab file and default line has id 5. So it looks OK. What else can be wrong?
I am running redhat ES 5 on a dell server and recently, I ran into a snag where I was able to reduce a partition (ext3) but could not run resize2fs (mismatch between physical and logical blocks (i never found a solution to this). In any case I decided to log in a single user mode (appended 'single' at the GRUB loader prompt) and now I am always taken to this single user mode every single time I reboot and can't seem to get out of it. I have tried init 5 (runlevel that the system is set to boot into by default) but that does nothing (no message on the # prompt).Of course, I have 2 problems here:
1) partition issue 2) cannot log out of single user mode.
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
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
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.