Impossible edit file because permission changed

[hendersj]

It seems you can’t edit files because it’s being mounted read-only.

Is this a dual boot system?

If it is, make sure that Windows is not set up for fast startup and that the filesystem is clean; ntfs-3g won’t, as far as I recall, mount a filesystem with errors as rw to prevent further corruption.

The reason OrsoBruno guessed you weren’t using ntfs-3g was because it wasn’t mounted, so it wasn’t showing what was expected with a filesystem mounted using ntfs-3g. That it’s mounted as type ‘fuseblk’ means that it most likely is using ntfs-3g.

[aggie]

@Giorgio_os

and here’s what you asked for:

:~> mount |grep mnt
/dev/nvme1n1p2 on /mnt type fuseblk 



====> (ro, <====


nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096)
nsfs on /run/snapd/ns/signal-desktop.mnt type nsfs (rw)

and this is a directory

mounted as read-only.

[OrsoBruno]

Confirming what others wrote, permissions did not change since your file shows

-rwxrwxrwx 1 root root 44294 25 mag 12.43 imbuca.odt

so any user can Read, Write and eXecute according to permissions, but the whole partition is mounted readonly (ro) for whatever reason, so nobody not even root can modify its content.
Now you have to investigate why that partition is mounted readonly.
A filesystem check, preferably from Windows if you are dual booting, might be the first step.

[OrsoBruno]

@hendersj

won’t, as far as I recall, mount a filesystem with errors as rw to prevent further corruption.

You recall correct, quoting from man ntfs-3g:

If either Windows is hibernated or its fast restart is enabled, partitions on internal disks are forced to be mounted in read-only mode.

[Giorgio_os]

I have Windows too in my pc and this is the origin of the problem. I updated Windows but the update took too long then I forced shut down using start pushbutton and this set whole partition in read-only mode. Regardless the distribution used (I had same problem with Linux Mint). Just start Windows, wait a bit to finish boot then then shut down “normally” solve the problem.
Thanks to all for help.
Windows is really a source of problem, I open it rarely, just to keep system up to date. But update process is really slow compared to Linux and I had no time to wait.
Linux forever

[hcvv]

@Giorgio_os

Linux forever

Then remove Windows from your system, change that file system to a Linux file system and you are done.