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Old 05-24-2007, 12:53 AM   #1
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why is my permission denied to /etc/fstab

ok im very very new to linux, just set up a dual boot system with xp64 and ubuntu 7.04 x64

Ok, my initial problem was to figure out how to mount my FAT32 drive,

but from everything ive read online i need to look at my /etc/fstab file...but i cannot access it because permission is denied...found nothing online that really addresses this.

how do i view the /etc/fstab ? ( i have done nothing in ubuntu thus far except update files.)

anyhelp would really be appreciated

Old 05-24-2007, 01:43 AM   #2
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One magic word: sudo.

Sudo gives you adminstrator permissions. In order to issue a command with such permissions, you would type this into the terminal:

sudo [command]

For example, if you need to edit /etc/fstab:

sudo nano /etc/fstab

and it will ask for your password, after which it will open the file so that it can be edited.
Old 05-24-2007, 01:58 AM   #3
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Is this an external drive or a partition on an internal hard disk?

If it is an external drive, I would recommend using UUID= in your fstab entry instead of the device, because the device might change in the future.

Try using udevinfo to gather the info you need.
First determine the device that is used presently. You can do that by monitoring /var/log/messages as you plug in the usb cable:
sudo tail -f /var/log/messages
Suppose that the partition on the drive is /dev/sda1. Then you can use udevinfo to determine what the UUID number is of the filesystem:
udevinfo -q env -n /dev/sda1
Note the line for "FS_UUID=". Copy the UUID number, then edit your /etc/fstab entry for the device:
UUID=<UUID #> /media/usbdisk vfat defaults,uid=yourusername,gid=yourgroup,noauto,fmask=0117,dmask=0007
Read the man mount page for more options. I used /media/usbdisk as the mount point, but the one you use is up to you. The "noauto" option will prevent the partition from being mounted on boot. Use this for removable disks.

If the partition is on an internal drive, then you can use the device instead, such as /dev/hda3 if that is what it is. In this case, don't use the "noauto" option.
Old 05-24-2007, 02:05 AM   #4
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i just cant do anything....

i have no permission to access anything

Ive tried using su, then typing in the password, and it says that im root@<user-id>.....

but even still when i try to look at my /etc/fstab file it tells me permission denied.

btw, this is a partition on internal drive.

I pretty much know what i have to do to mount my FAT32 but i just cant gain permission

please help
Old 05-24-2007, 02:09 AM   #5
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Don't use su, ubuntu doesn't allow it unless you set it up yourself first. Use sudo.


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