how all users gain read/write/delete/modify access to everyone's files/folders in an ext4 partition

Try:

sudo chmod -R 777 /media/500G

To get usage help on chmod command type:

man chmod

-----------------------------------

New to Ubuntu:
- read the Ubuntu Manual, it's very informative: http://ubuntu-manual.org/
Click on the "download Button" to download the latest PDF version.
- The Ubuntu pocket guide: http://www.ubuntupocketguide.com/
- The online help https://help.ubuntu.com/10.04/index.html

Relax and fun:
http://planet.ubuntu.com/ and Full Circle Magazine http://fullcirclemagazine.org/

i did
     sudo chmod -R 777 /media/500G

it went well with the files/directories already in it, they all bacame free for read/write/modify/delete to all other users...

but when i made another file/folder, it seems that i need to "sudo chmod -R 777 /media/500G" again for the newly created file/folder to be free to all other users also...

and it goes so also when other users are the ones creating files/directories, their files are still read-only to me and to the other users...

this is not the case when previously this partition is formatted as ntfs...

can i make this partition behave such that "all files/folders that are created in that partition by any user is also available to any other users as if they were their own - can be modified, deleted, read, can create folders and files" and doesn't need to "sudo chmod -R 777 /media/500G" each time a new file/directory is created?

thanks...

Please modify your /etc/fstab as follow:

UUID=084759c1-332b-4ef9-9038-53c3cb58d5c3 /media/500G ext4 rw,suid,dev,exec,auto,users,async,umask=000 0 0

thanks for answering promptly...

i did the fstab modification as suggested, but when i restarted the pc, the partition wouldn't mount...

the syslog has this entry:
     LinuxBox kernel: [ 48.624271] EXT4-fs (sda1): Unrecognized mount option "umask=000" or missing value

based here, http://ubuntuforums.org/showthread.php?t=283131, "umask" is for vfat/ntfs filesystems, am i correct?

then, i still need help...

thanks...

You can make the system more secure with 770 then making a new group to add the users you want access to, to the group and running:

sudo chown -R :groupname /media/500G; sudo chmod -R 770 /media/500G

The last octet is OTHERS which will give literally anyone and anybody access to the data which isn't smart, having the group gives you control.

@actionparsnip:

what should be the fstab entry for that partition...?

UUID=084759c1-332b-4ef9-9038-53c3cb58d5c3 /media/500G ext4 rw,suid,dev,exec,auto,gid=groupname,async,umask=000 0 0

the group (and root) will now have the only access

it didn't work either

the partition still wouldn't automount at startup, can't even be mounted manually

i guess i'd have to re-format the partition to ntfs

thanks for all the help!

but if anyone would find a way, i'd still want to operate all of my partitions/harddisks in the native linux ext4 filesystem... salamat!

Why use NTFS?

it's because after putting this in the fstab entry:

     UUID=084759c1-332b-4ef9-9038-53c3cb58d5c3 /media/500G ext4 rw,suid,dev,exec,auto,gid=groupname,async,umask=000 0 0

and doing this:

     sudo chown -R :groupname /media/500G
     sudo chmod -R 770 /media/500G

the partition still wouldn't mount...

i cannot make an ext4 partition behave the way ntfs behaves in my box (with Ubuntu 10.04) - "it automounts on startup, able to be used by other users even while on multiple simultaneous login... and what i really like is that all files/folders that are created in that partition by any user is also available to any other users as if they were their own - can be modified, deleted, read, can create folders and files" (as i wrote in my question)

but again, as i said, "but if anyone would find a way, i'd still want to operate all of my partitions/harddisks in the native linux ext4 filesystem..."

thanks!

The Unix solution should be:
1) To have all users in same group
2) To have all users with a umask which allow read/write for group.
See http://en.wikipedia.org/wiki/Umask

Chmod apply only on current files, umask will apply on new files and folders.
By experience, sharing a FAT32 mounted between many users on same computer is not so easy and need, by default, to remove device before logout and inserting before login.