V4 and /grub/boot/menu.lst

[zillah]

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]

Any idea or help ?

[UnderScore]

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]

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

Why can't I use :

gedit /boot/grub/menu.lst

[UnderScore]

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

[zillah]

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]

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]

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]

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

[zillah]

Are you root user? And if you are not root user, then either become root user or use sudo.
Yes I am root user.


Next, is /mnt/hdb6 mounted read only? Remount it as writeable
Could you please explain ,what should I do to check and how can I mount it again?

[zillah]

Could you please explain ,what should I do to check and how can I mount it again?
You meant I have to issue ls -al to see the permission for the file,,,then to change the permission I have to type in:

chmod +w /mnt/hdb6/boot/grub/menu.lst or chmod +w /mnt/hdb6/boot/grub/menu.lst,,,,,,,,didn't you ?

[zillah]

if you do below, you will able to modify /mnt/hdb6/boot/grub/menu.lst

1- mount /dev/hdb6 /mnt/hdb6
2- Right click on the hdb6 icon (my case).
3- Click on "Actions"
4- Change the read/write permissions to writeable.

[infoseeker]

What I do is :
open shell/console
'su' to root
'mc' to open midnight commander
change to /mnt/hdb6........etc using keyboard/mouse
select menu.lst (ie highlight it)
press 'F4' to edit (but beware.....changing the wrong thing can make your system unusable, don't blame me if you do :wink: )

[zillah]

I will try your suggestion and let you know

[zillah]

change to /mnt/hdb6........etc using keyboard/mouse
I highlighted /mnt/hdb6,,,,I tried "Enter" button it did not let me access it.
I tried other keyboard buttons , I could not access it,,,,

Is there any special charcter I have to hit to be able to access it ?