i have compiled pure-ftp , this pure-ftp use some users have can i limit this users with disk
quotas i have tryed this

shell>groupadd ftpuser_1
shell>useradd -g ftpuser_1 ftpuser_1
shell>edquota -u ftpuser_1

and now in vi editor i have tryed to edit blocks value when i have finished to edit
blocks value i press esc and type :wq (exit with saving)
but now i get the error - cannot change current block allocation

is it right that i am trying to edit blocks value, i only want to set limit for this user, i want that this user can copy
or upload to ftp files, which size is low than 2Mb

how can i make this ,,,,

thanks for hepling people !