Ext4 flash drive partition permission problem (Solved)

Question

I want to have a linux partition on flash drive which I can insert on any linux system and have it automounted and to have read and write permission so as to copy and transfer files. I tried ext4 partition but it is not allowing me write after automounting (I need to open thunar with sudo for writing). I do not want to use fat32 format. I tried searching for this in wiki/forums/web but mostly it is suggested to mount it manually for proper permissions. Is it possible to have the partition automounted with read/write permission for the default user? Can ext2/ext3 provide this facility? Thanks for your help.
Last edited by rnarch (2012-08-12 12:59:10)

Answer 1

well, the chown command makes it (presumably) your user as the owner, and then possibly the "user" group as the group owner.  the chmod command then sets the permissions to 777 which is the same as setting it to ugo+rwx (user,group, and other add read, write and execute).  So it should give correct permissions for access by anyone (hence other is given read write and execute permissions). 
For access via same user, it is not the name, but rather the user id that is key.  Same goes for group.  For instance, on my machine, I previously dual booted with OSX, so in order to give mysefl access to my OSX partition without issue, I issued myself an UID of 501, which is where OSX starts issuing UID's.  Whereas typically linux starts at 1000.   But I can give mysefl any username I want as long as my uid matches.
Make sense?