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View Full Version : [SOLVED] Walkthrough required - change mount locations, permissions, and set to mount at boot


aquascrotum
November 19th, 2009, 10:17 PM
Hi all

I did a clean install of Karmic and am sitting with the same head scratcher I always have after upgrades.

I have 2 physical harddrives, the first contains WinXP and Karmic. The second contains 3 partitions - 1 Ext3, 1 FAT32, 1 NTFS.

At present all partitions on the 2nd drive require a password before mounting and all mount to /media.

In my jaunty install I had all automounted to /mnt at startup, with no problems with permissions - I'd like to do this again.

No idea where to start though. Vaguely remember fstab or something. Any help is appreciated.

Cheers
nothingspecial
November 19th, 2009, 10:38 PM
sudo blkid to find the UUID`s of the different partitions, then add them to /etc/fstab like so


UUID=b80dc834-e5ed-423c-8538-0fb448d0d34c /media/music ext3 relatime,noexec 0 2
UUID=48e6d536-a3dc-4d59-88a0-1d291cb1bb27 /media/backup ext3 relatime,noexec 0 2
aquascrotum
November 19th, 2009, 10:43 PM
sudo blikd gets me "sudo: blikd: command not found"....?
sisco311
November 19th, 2009, 10:50 PM
sudo blikd gets me "sudo: blikd: command not found"....?

it's:

sudo blkid

or

ls -al /dev/disk/by-uuid/


lrwxrwxrwx 1 root root 10 Nov 19 07:50 82ad448c-acce-45bb-a023-8be0e88b9ff7 -> ../../sda4

uuid
partition
sisco311
November 19th, 2009, 11:01 PM
to mount the fat and ntfs partitions, instead of relatime,noexec use the following mount options:

defaults,gid=plugdev,dmask=002,fmask=113

this will set the ownership and permissions as follow:
owner: root
group: plugdev

read/write/execute permission for root and users in the plugdev group (directories)

(execute allows changing into the directory, i.e. cd command)

read/write permission for root and users in the plugdev group (files)

read/execute for others (directories)
read for others (files)

community/FilePermissions

And instead of ext3 use vfat and ntfs for the filesystem type.

to add a user to the plugdev group:

sudo adduser username plugdev
aquascrotum
November 19th, 2009, 11:04 PM
it's:

sudo blkid

or

ls -al /dev/disk/by-uuid/


lrwxrwxrwx 1 root root 10 Nov 19 07:50 82ad448c-acce-45bb-a023-8be0e88b9ff7 -> ../../sda4

uuid
partition

I've got my blkid now (thanks for that), as follows:


/dev/sda1: SEC_TYPE="msdos" LABEL="DellUtility" UUID="07D6-0606" TYPE="vfat"
/dev/sda2: UUID="603893EF3893C308" LABEL="WinXP OS" TYPE="ntfs"
/dev/sda3: LABEL="DellRestore" TYPE="vfat"
/dev/sda5: UUID="3b2c5929-7779-494b-aaa9-d8af19592851" TYPE="ext4"
/dev/sda6: UUID="5a6a6597-5c90-4660-9e04-a75bea950e37" TYPE="swap"
/dev/sdb5: LABEL="iTunes" UUID="49CF-6DFB" TYPE="vfat"
/dev/sdb6: UUID="4FB7F05A089D3BBA" LABEL="WinXP - Linux Swap" TYPE="ntfs"
/dev/sdb7: LABEL="KyleLinux" UUID="17689df7-d68d-4fd8-8831-5d0dc6b56202" SEC_TYPE="ext2" TYPE="ext3"
/dev/sdc1: UUID="2CE4F2D1E4F29BF0" LABEL="Buffalo Media" TYPE="ntfs"

I created my desired mount points for each partition in /mnt/... I've had an initial stab at editing my fstab but all 3 partitions have gone missing after rebooting.

Output from fstab:


# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# / was on /dev/sda5 during installation
UUID=3b2c5929-7779-494b-aaa9-d8af19592851 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda6 during installation
UUID=5a6a6597-5c90-4660-9e04-a75bea950e37 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
UUID=49CF-6DFB /mnt/itunes vfat user,noauto,exec,utf8 0 0
UUID=4FB7F05A089D3BBA /mnt/linux-xp ntfs user,noauto,exec,utf8 0 0
UUID=17689df7-d68d-4fd8-8831-5d0dc6b56202 /mnt/kyle-linux user,noauto,exec,utf8 0 0

In terms of the options I'm applying there I've no idea what I'm doing tbh, I just copied them from the cdrom permissions.
falconindy
November 19th, 2009, 11:11 PM
Copying options from a cd-rom drive for a hard drive isn't ideal. I would use something such as:


defaults,noatime

In case you're curious, defaults expands to:

rw,suid,dev,exec,auto,nouser,async

If you'd prefer to have access dates, use relatime instead of noatime. Notice its relatime and not realtime.

edit: I should read partition types before i post.. see below instead.
sisco311
November 19th, 2009, 11:12 PM
UUID=49CF-6DFB /mnt/itunes vfat defaults,gid=plugdev,dmask=002,fmask=113 0 0

UUID=4FB7F05A089D3BBA /mnt/linux-xp ntfs defaults,gid=plugdev,dmask=002,fmask=113 0 0

UUID=17689df7-d68d-4fd8-8831-5d0dc6b56202 /mnt/kyle-linux ext3 relatime 0 2


EDIT: you dont have to reboot to mount the partitions, just run:

sudo mount -a

mount -a = mount all partitions listed in fstab.
aquascrotum
November 19th, 2009, 11:49 PM
UUID=49CF-6DFB /mnt/itunes vfat defaults,gid=plugdev,dmask=002,fmask=113 0 0

UUID=4FB7F05A089D3BBA /mnt/linux-xp ntfs defaults,gid=plugdev,dmask=002,fmask=113 0 0

UUID=17689df7-d68d-4fd8-8831-5d0dc6b56202 /mnt/kyle-linux ext3 relatime 0 2


EDIT: you dont have to reboot to mount the partitions, just run:

sudo mount -a

mount -a = mount all partitions listed in fstab.

Genuinely, thanks a million!! Worked a treat. You've done your good deed for the day ;)
sisco311
November 19th, 2009, 11:56 PM
Genuinely, thanks a million!! Worked a treat. You've done your good deed for the day ;)

Cool!!! And it's only 00:55 AM here. :)

Please mark your thread as [SOLVED] by selecting Mark this thread as solved from the Thread tools.

Thanks!
bodhi.zazen
November 20th, 2009, 12:23 AM
FYI :

How to fstab - Ubuntu Forums (http://ubuntuforums.org/showthread.php?&t=283131)

You can do it with a GUI tool : http://pysdm.sourceforge.net/

pysdm is in the repos.
sisco311
November 20th, 2009, 12:28 AM
FYI :

How to fstab - Ubuntu Forums (http://ubuntuforums.org/showthread.php?&t=283131)

You can do it with a GUI tool : http://pysdm.sourceforge.net/

pysdm is in the repos.

does pysdm uses uuids to create the fstab entry?

Never mind, it still uses /dev/dsXY which is no longer preferred since these device assignments can change between system boots.
bodhi.zazen
November 20th, 2009, 12:51 AM
does pysdm uses uuids to create the fstab entry?

Never mind, it still uses /dev/dsXY which is no longer preferred since these device assignments can change between system boots.

You raise a good point.

You may use uuid with psydm, but the mount points are then named by uuid, so they are ugly :p

pysdm is , IMO, most helpful for fixed (usually internal) drives as these are most commonly the ones used in fstab entries (most people do not write a fstab entry fo rflash drives).

:popcorn:
sisco311
November 20th, 2009, 01:42 AM
You raise a good point.

You may use uuid with psydm, but the mount points are then named by uuid, so they are ugly :p

pysdm is , IMO, most helpful for fixed (usually internal) drives as these are most commonly the ones used in fstab entries (most people do not write a fstab entry fo rflash drives).

:popcorn:

Unfortunately, also fixed drives can end up with a different device names after a reboot. It's not so common but it happens.


And yes, in pysdm, you can refer to the partition by the uuid in the name section, but in the fstab entry the device name will be still /dev/sdXY (at least in Lucid Lynx).