[Solved] /etc/fstab items reqd for access permission?

[jbh911]

Having some fun and games trying to setup a backup using Deja-dup with an external hard drive formatted in ext4.
When Deja-dup high lights a backup is required, I plug in the external hard drive, that mount auto and after a delay I receive the following message:
Permission denied when trying to create ‘/duplicity-full.20181028T064559Z.vol1.difftar.gz’. So still a missing hole or two!

Next time I try to boot my laptop I get Welcome to emergency mode! etc, etc

I then discover (# nano /etc/fstab) the system has generated a line in /etc/fstab consisting of the ext HDD UUID, without the UUDI= plus the /mount point details!
I've added UUDI= and commented that line out, saved /etc/fstab and rebooted via systemctl reboot successfully.

So what are the missing items for the ext HDD line in /etc/fstab? <type> ext4, <options> ??, <dump> ?? and <pass> ??
How clever is Linux, to generate some info within /etc/fstab for the ext HDD and then shoot into "Welcome to emergency mode!" to complete the task.

[phd21]

Hi jbh911,

See this post
If you have already tried to edit fstab manually, remove those first.

NTFS Partition does not activate even with automount, until clicking drive in file manager - Linux Mint Forums
viewtopic.php?f=208&t=278971&hilit=disks

Hope this helps ...

[jbh911]

Thanks pdf21 for the intro to this aspect of Disks abilities.
However, I haven't been successful in gaining access to the ext HDD, in fact am getting deeper into a hole.
When I respond to Deja-dup's request for the ext HDD to be connected, on doing so I get the message:
Device /dev/sdb1 is already mounted at '/mnt/wwm-0x500 etc etc.
On top of that I can't access /etc/fstab. I get nano opening up a page titled New Buffer with the message:
File /etc is being edited (by root with nano 2.5.3, PID 14060); continue?
Laptop booted OK this morning, so still in front!
Appears I need to clean out a few file, reformat the ext HDD and start again!

[phd21]

Hi jbh911,

You can try removing any entries in the "fstab" file except the first 2 which are the boot drive and the Linux swap drive, save the file and exit the text editor, then rebooting and using the "disks" application like I mentioned.

Can you please post the current results of:

Code: Select all

cat /etc/fstab

To edit the fstab file manually using the "gedit" editor.

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sudo apt install gedit

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sudo gedit /etc/fstab

Hope this helps ...

[jbh911]

PHD21 - as requested current output of:

~ $ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' 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>
# / was on /dev/sda8 during installation
UUID=9e86881e-3d5c-45c5-aaa6-1b837b27fd46 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda2 during installation
UUID=AA16-6962 /boot/efi vfat umask=0077 0 1
# /home was on /dev/sda9 during installation
UUID=2b90a06f-dfdc-4a2e-a0ed-3aa9b293f666 /home ext4 defaults 0 2
# swap was on /dev/sda7 during installation
UUID=06d6a309-9ff7-4372-884a-65a79befb54b none swap sw 0 0
# The following info is via Disk app!

/dev/disk/by-id/wwn-0x50014ee2ad5f496d-part1 /mnt/wwn-0x50014ee2ad5f496d-part1 auto nosuid,nodev,nofail,x-gvfs-show 0 0

[phd21]

Hi jbh911

Okay, it would help to have some more information. How many operating systems are on the boot drive and why are there so many partitions?

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sudo lsblk -a

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sudo lsblk -f

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sudo fdisk -l

You can remove the last entry, save the changes, reboot, and retry the "Disks" application. Tip: if you label the drive's partition with something easy to identify it that helps, and you can use that partition label in "disks" app and then everything can refer to that label like file managers, applications, etc... rather than the UUID number.

# The following info is via Disk app!
/dev/disk/by-id/wwn-0x50014ee2ad5f496d-part1 /mnt/wwn-0x50014ee2ad5f496d-part1 auto nosuid,nodev,nofail,x-gvfs-show 0 0

Hope this helps ...

FYI: These are my results from "cat /etc/fstab" booting from my second SSDrive.

cat /etc/fstab

# /etc/fstab: static file system information.
#
# Use 'blkid' 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>
# / was on /dev/sdb1 during installation
UUID=50f2bfd6-999e-40ce-a07b-26cfc2d94bd8 / ext4 noatime,errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=e5c961dd-04d1-46a3-a31b-8c6aba142d5f none swap sw 0 0
# swap was on /dev/sdb4 during installation
UUID=6f65174f-0133-4c80-8f1a-5207d3c4244b none swap sw 0 0
#
# These are partitions I added from the "disks" application that work perfectly well
#
LABEL=lm18kde /mnt/lm18kde auto nosuid,nodev,nofail,x-gvfs-show 0 0
LABEL=ssdata480 /mnt/ssdata480 auto nosuid,nodev,nofail,x-gvfs-show 0 0
LABEL=ssdata2 /mnt/ssdata2 auto nosuid,nodev,nofail,x-gvfs-show 0 0

[jbh911]

Hi PHD21
I have Linux Mint 18.3 MATE 64 dual booted with Windows 8, hence the 9 partitions.
As requested: I've removed the Windows info from each.
~ $ sudo lsblk -a
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 0 loop
sdb 8:16 0 298.1G 0 disk
└─sdb1 8:17 0 298.1G 0 part /mnt/wwn-0x50014ee2ad5f496d-part1


~ $ sudo lsblk -f
NAME FSTYPE LABEL UUID MOUNTPOINT
sdb
└─sdb1 ext4 5154d6e1-d529-400d-8dd9-e98fee6ea948 /mnt/wwn-0x50014ee2ad
sr0
$ sudo fdisk -l
Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: DB263E01-CFE2-4B35-83AB-8F906D3CE5B5

Disk /dev/sdb: 298.1 GiB, 320072933376 bytes, 625142448 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00056976

Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 625141759 625139712 298.1G 83 Linux

[phd21]

Hi jbh911,

I have Linux Mint 18.3 MATE 64 dual booted with Windows 8, hence the 9 partitions.

I still do not understand why there are 9 partitions, how many are for MS Windows?

As requested: I've removed the Windows info from each.

I only said to remove the last entry in "fstab" not anything else.

You can add (or re-add) the MS Windows partitions as well as any other partitions using the "disks" application for any partition that you want auto-mounted (always available).

[jbh911]

Hi phd21
Sorry to worry you, it's only the Windows data in the $ sudo lsblk -a, $ sudo lsblk -f and $ sudo fdisk -l outputs that I deleted - just to keep the size down.

Of the 9 partitions, 6 are Windows:
sda1 Basic data ntfs
sda2 EFI system fat32 /boot/efi
sda3 Microsoft reserved unknown
sda4 Basic data fat32 PRC_RP
sda5 Basic data ntfs Boot
sda6 Basic data ntfs Recovery
The remaining 3 are Linux, /, /home & swap

[phd21]

HI jbh911,

Okay. So is your system working now to automatically mount your partitions?

[jbh911]

Hi phd21

Well no. Have sorted out a few issues and have now got The ext HDD auto booting with a Laptop_BU folder. However I now have the following issue -
Backup Failed Permission denied when trying to create '/duplicity-full.2018102T062448Z.vol1.difftar.gz
I'm struggling with cdmod permission expressions try to sort this out!

Ownership sorted using chown In Terminal see chown --help for details