edquota is a quota editor. One or more users may be specified on the command line. For each user a temporary file is created with an ASCII representation
of the current disk quotas for that user for each mounted ufs file system that has a quotas file, and an editor is then invoked on the file. The quotas may then be modified, new quotas
added, etc. Upon leaving the editor, edquota reads the temporary file and modifies the binary quota files to reflect the changes made.
The editor invoked is vi(1) unless the EDITOR environment variable specifies otherwise.
Only the super-user may edit quotas. In order for quotas to be established on a file system, the root directory of the file system must contain a file, owned by root, called quotas.
proto_user and username can be numeric, corresponding to the UID of a user. Unassigned UIDs may be specified;
unassigned names may not. In this way, default quotas can be established for users who are later assigned a UID.
If no options are specified, the temporary file created will have one or more lines of the form
fs mount_point blocks (soft =number, hard =number ) inodes (soft =number, hard =number)
Where a block is considered to be a 1024 byte (1K) block.
The number fields may be modified to reflect desired values.