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Thilo
Asked: 2020-04-02 04:34:32 +0800 CST

Cannot access ext drive properly (rwx problems)

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When auto-mounted the drive is not read- or writable so I remount using:

mount -o remount,uid=1000,gid=1000,rw /dev/..

mount says:

rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096,uhelper=udisks2

Afaik uid 0 is root?

As an example as to what I do:

sudo su

rm -f filename

Now the file disappears from the folder as I intended, as soon as I reload the folder, remount or w/e the file reappears, same goes for replacing files, creating folders etc.

Edit: all files and folders are rwxrwxrwx / Ubuntu 19.10

Maybe someone can enlighten me, as I am somewhat of a noob and my understanding goes as far as file ownership and rwx permissions..

permissions mount hard-drive

1 Answers

  1. Best Answer

    You could set your partition in /etc/fstab as follows:

    UUID=96eaefa9-b32f-446b-baaf-c780f7fd8ada /partition_mountpoint_path           ext4    defaults  0   2

    You could get a UUID from sudo blkid command output.

    But to access it you should have required permissions to change its folders and files ownership.

    For example, if you want your user to access (read/write) some test folder on it, make sure it has appropriate ownership:

    ls -ailh /path_to_drive_with_folder

    For example, one folder in my user's directory looks like this:

    786848 drwxrwxr-x  5 user user  4.0K Mar  2 12:07  .ViberPC

    If you have something like: 

    786848 drwxrwxr-x  5 root root  4.0K Mar  2 12:07  myfolder

    Then change its ownership the next way:

    sudo chown -R user:user /pathtoyourdrive/myfolder

    Your user should have permissions to read/write inside of that folder.
    drwx: directory, read, write, execute
    d rwx rwx rwx: directory, user, group, others
    drwxrwxr-x means everyone could read and execute files, but only user and users from group could write. Others do not have write permission.

    And yes, uid 0 is root. You could find out it by cat /etc/passwd | grep root

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