Can't change permission/ownership/group of external hard drive on Ubuntu
Solution 1
Check the filesystem type it's using first with df -T
:
sys@p:~$ df -T Filesystem Type 1K-blocks Used Available Use% Mounted on ext3 ext3 19222656 1050948 17195164 6% / tmpfs tmpfs 1684988 0 1684988 0% /lib/init/rw udev tmpfs 10240 64 10176 1% /dev tmpfs tmpfs 1684988 0 1684988 0% /dev/shm
If it's mounted on /mnt/external
for example you will see that in the far right column. You can see the filesystem type in the second column. If it's NTFS, you'll want NTFS-3G (probably already installed, if not sudo apt-get install ntfs-config
then gksu ntfs-config
). Linux already has FAT support for read & write although they do not support permissions.
If you want an NTFS partition mounted with ownership applied to a specific user/group, specify it in the mount switches:
mount -o uid=username,gid=groupname /dev/sdc /path/to/mount
If you change to ext3 as suggested above, you can use chown
:
chown -R user *
chown -R user .
Solution 2
As Kim said, you'll only get Unix permissions and ownership on a Unix filesystem. ext3 is a good candidate.
If you must use this drive without reformatting, you can do it with options to the mount
command that specify the owner, group, and/or read/write permissions. These options affect all files on the drive (see John T's answer for how to determine the FSTYPE):
# list files as owned by X, use numerical UID as found in /etc/passwd
$ mount -t <FSTYPE> -o uid=X /dev/?? /path/to/mount/point
# list files as owned by group Y, use numerical GID found in /etc/passwd
$ mount -t <FSTYPE> -o gid=Y /dev/?? /path/to/mount/point
# list files as accessible per umask
# (022 gives rwx permissions to owner, r-x permissions to everyone else)
$ mount -t <FSTYPE> -o umask=022 /dev/?? /path/to/mount/point
# combine all of the above:
$ mount -t <FSTYPE> -o uid=X,gid=Y,umask=022 /dev/?? /path/to/mount/point
Solution 3
I did this and it worked:
sudo umount /dev/sda3 /media/windows1
sudo umount /dev/sda5 /media/windows2
and then
sudo mount -o rwx /dev/sda3 /media/windows1
sudo mount -o rwx /dev/sda5 /media/windows2
Note that I am Using Ubuntu 11.10 and sda3
is my Windows C:
, sda5
is G:
.
Solution 4
So, I had a bit of a time, since I had backups from multiple machines on the same drive. I had to install hdfsplus utilities (hfsprogs), then mount the drive, and finally change ownership of the relevant folders using both the user and group name.
Note: you can list the mount points and devices by just typing mount
at the terminal.
First:
sudo apt-get install hfsprogs
Then unmount your drive if it has already been mounted:
sudo umount /media/user/mount_point
(Re)Mount the drive using the following args:
sudo mount -t hfsplus -o force,rw /dev/sdb# /media/user/mount_point
Navigate to the directory containing the problem folders. Then do:
chmod -R your_user_group:your_user_name ./target_directory
Hope that helps.
Solution 5
It's probably formatted as FAT, which doesn't support file permissions. Use ext3 instead.
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MikeN
Updated on September 17, 2022Comments
-
MikeN over 1 year
I have an external hard drive connected to my Linux box. I wanted to setup a web server to access files on it, but the permission on all files and directories on the drive are
rwx
for the owner which is my local login, and the group is theroot
group.I need the files readable by the apache user, I was trying to set all files to be
chmod a+rwx -R *
, but this doesn't do anything (gives no errors, just has no effect.) I tried changing the group usingchgrp
to my user group, but that won't work either, it gives me errors that I lack permission even when I run all those commands assudo
!What's up with this hard drive???
sudo chmod a+rwx *
should work on anything, right? -
SolStack about 4 yearsThis is the only one of the solutions that worked for me. Tried all of the others. Thanks!