V4 and /grub/boot/menu.lst

**zillah** · 01-03-2006, 02:49 PM

When I use Knoppix V4 to edit file , I received this message :

You do not have enough permission to read file://mnt/hdb4/boot/grub/menu.lst

How can I get root previlidge to modify the file ?

**zillah** · 01-06-2006, 09:03 AM

Any idea or help ?

**UnderScore** · 01-06-2006, 04:51 PM

Two ways:
1.) First become root. use the command: su -
Then change the root password: passwd
Enter the new password twice, then exit: exit
now use KDEsu to run a editor as root: kdesu kate /mnt/hdb4/boot/grub/menu.lst

2.) Or use sudo: sudo kate /mnt/hdb4/boot/grub/menu.lst

**zillah** · 01-06-2006, 05:05 PM

Thanks for that ....I am going to try it and let you know.

Why can't I use :

gedit /boot/grub/menu.lst

**UnderScore** · 01-06-2006, 05:15 PM

Oh its also possible that the /mnt/hd4 is mounted read-only. So that too might prevent you from changing (writing) to a file.

Why can't I use: gedit /boot/grub/menu.lst

That file is quite important & special to the system. It probably has permissions & owership to prevent non-priviledged users (non-root users) from making changes to it. Do a:
ls -l /boot/grub/menu.lst
and it will probably look something like:

Code:

-rw-------  1 root root 775 Aug 11  2004 menu.lst

**zillah** · 01-15-2006, 07:32 AM

knoppix@0[knoppix]$ su
root@0[knoppix]# passwd
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
root@0[knoppix]#
root@0[knoppix]#
root@0[knoppix]# kdesu kate /mnt/hdb6/boot/grub/menu.lst
mkdir: Owner of /tmp/.ICE-unix should be set to root
DCOPClient::attachInternal. Attach failed Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed
ICE Connection rejected!

DCOPClient::attachInternal. Attach failed Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed
DCOPServer self-test failed.
kdeinit: DCOPServer could not be started, aborting.
kate: ERROR: KUniqueApplication: Can't setup DCOP communication.
root@0[knoppix]# ICE Connection rejected!

root@0[knoppix]#
root@0[knoppix]# sudo kate /mnt/hdb6/boot/grub/menu.lst
mkdir: Owner of /tmp/.ICE-unix should be set to root
DCOPClient::attachInternal. Attach failed Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed
ICE Connection rejected!

DCOPClient::attachInternal. Attach failed Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed
DCOPServer self-test failed.
kdeinit: DCOPServer could not be started, aborting.
kate: ERROR: KUniqueApplication: Can't setup DCOP communication.
root@0[knoppix]# ICE Connection rejected!

**zillah** · 01-15-2006, 07:41 AM

Then I found option called "root shell",,,I opened that one and I typed in:

vim /mnt/hdb6/boot/grub/menu.lst,,,,,,,,,,,,,,,,,,,,,,,it did work,,,

nedit /mnt/hdb6/boot/grub/menu.lst,,,,,,,,,,,,,,,,,,,,,,,it did work as well.

**zillah** · 01-23-2006, 11:09 AM

vim /mnt/hdb6/boot/grub/menu.lst,,,,,,,,,,,,,,,,,,,,,,,it did work,,,

nedit /mnt/hdb6/boot/grub/menu.lst,,,,,,,,,,,,,,,,,,,,,,,it did work as well.

Yes I can read it,,,but today I realized that I can not modify it,,,,what should I do to overcome this issue ?

**UnderScore** · 01-23-2006, 04:22 PM

things to check:
do you have permissions to write it? Are you root user? And if you are not root user, then either become root user or use sudo.
Next, is /mnt/hdb6 mounted read only? If so, then even root user can not write to it? Remount it as writeable