hi,

I have linux fedora core 4 server system, i lost my root password. I try to enter when booting grub and pressing 'e'key. But there is only 'p' option is there. Anyone give me information to reset the root password and to login.

regards,
KMB

can you login using a different linux system or do you have a bootable install cd and are able to boot the cd? you can chroot to your password-forgotten system by 'chroot /path/to/systemroot' and do "echo "root:newpassword" | chpasswd"

oooh nice answer <makes a note> but isn't OP talking about the GRUB password?
http://www.gnu.org/software/grub/man.../Security.html

In which case, remove the "password" bit fram /etc/boot/grub.conf (menu.lst)
http://www.linuxquestions.org/linux/..._grub_password

1 -reboot your pc.
2 - when you see the fedora blue screen display, press the tab key.
3 - press e
4 - highlight the second line that saying.
kernel /vmlinuz-2.6.23.x.x.fc8 ro root=LABEL=/ rhgb quiet
5 - enter 1 after quiet
6 - press enter
7 - press b to boot to single mode
8 - the login shell display
sh-3.2#
9 - type passwd and press enter
type your new passwd and confirm the new passwd.
10 - type reboot when you done.

enjoy the freedom of choice and in..

processguide: please let us know how you got on.
OP seems to be telling us that the "press e" option is not there.
However - this does provide a different way to break into the PC.

The lesson to take away from all this is that it is very difficult to protect against an attacker who has physical access to the machine.

well if that's the case shouldn't he just boot from a boot cd and re-place grub from there?

that replaces stage in the mbr doesn't it? You still need to edit the menu list.

yes reconfigure or simply replace the mbr.. and also yes perhaps edit the menu.lst to disable the security.
after running grub in the boot cd, the command seems to be just something like this:
where X is the partition number of your boot partition.
That's what I do most of the time when some OS replaces my boot records.
Here btw I don't know the purpose of 'find /boot/grub/stage1_5'.
It seems to be of no use.. perhaps just to put the file locations in the buffer for use with the setup command.. although obviously it's to show the user where the files are.. showing what to add as a parameter to another command but setup doesn't seem to need any parameter either.

hmmmmm.. maybe the sequence of the command is:
perhaps we'll need a grub expert for this

btw i use these command sequence instead of grub-install because sometimes grub-install doesn't work the way it should.

How about trying this
1. Position the cursor on Kernel and type e
2. Boot to a shell : add
init=/bin/sh
(the file system is mounted read-only so you can copy files out. You need to remount the file system with read/write permission to be able to change files.

Note : my kind apologies to all boarders, if iam wrongly interpreting the problem.
rgds
bil

Linux registered user #467324
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I'd certainly say that if you can login as yourself (or anyone) and 'su -' or sudo up, that's got to be simpler than messing directly with GRUB etc at boot time.

another one.. i think this OP's a bot too. i made a long speech and now i feel like i'm a fool. why do they do this anyway?