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The file .pgpass in the home directory is a file
that can contain passwords to be used if the connection requires a
password. This file should have the format:
hostname:port:database:username:password
Any of these may be a literal name, or *, which matches
anything. The first match will be used so put more specific entries first.
Entries with : or \ should be escaped
with \.
The permissions on .pgpass must disallow any
access to world or group; achieve this by the command
chmod 0600 .pgaccess.
If the permissions are less strict than this, the file will be ignored.
