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GNU/Linux |
RedHat 5.2(Apollo) |
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pg_passwd(1) |
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pg_passwd - manipulate the flat password file
pg_passwd password_file
Pg_passwd is a tool to manipulate the flat password file functionality of PostgreSQL. Specify the password file in the same style of Ident authentication in $PGDATA/pg_hba.conf:
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host unv 133.65.96.250 255.255.255.255 password passwd |
The above line allows access from 133.65.96.250 using the passwords listed in $PGDATA/passwd. The format of the password file follows those of /etc/passwd and /etc/shadow. The first field is the user name, and the second field is the encrypted password. The rest is completely ignored. Thus the following three sample lines specify the same user and password pair:
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pg_guest:/nB7.w5Auq.BY:10031:::::: | |
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pg_guest:/nB7.w5Auq.BY:93001:930::/home/guest:/bin/tcsh | |
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pg_guest:/nB7.w5Auq.BY:93001 |
Supply the password file to the pg_passwd command. In the case described above, after cd’ing to $PGDATA, the following command execution specify the new password for pg_guest:
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% pg_passwd passwd | |
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Username: pg_guest | |
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Password: | |
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Re-enter password: |
where the Password: and Re-enter password: prompts require the same password input which are not displayed on the terminal. The original password file is renamed to passwd.bk.
Psql authentication uses the -u option. The following lines show the sample usage of the option:
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% psql -h hyalos -u unv | |
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Username: pg_guest | |
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Password: | |
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Welcome to the POSTGRESQL interactive sql monitor: | |
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Please read the file COPYRIGHT for copyright terms of POSTGRESQL | |
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type \? for help on slash commands | |
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type \q to quit | |
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type \g or terminate with semicolon to execute query | |
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You are currently connected to the database: unv | |
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unv=> |
Perl5 authentication uses the new style of the Pg.pm like this:
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$conn = Pg::connectdb("host=hyalos dbname=unv | |
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user=pg_guest password=xxxxxxx"); |
For more details, refer to src/pgsql_perl5/Pg.pm.
Pg{tcl,tk}sh authentication uses the pg_connect command with the -conninfo option thus:
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% set conn [pg_connect -conninfo \ | |
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"host=hyalos dbname=unv \ | |
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user=pg_guest password=xxxxxxx "] |
Use can list all of the keys for the option by executing the following command:
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% puts [ pg_conndefaults] |
$PGDATA/pg_hba.conf
The Host Based Authentication file
psql(1).
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pg_passwd(1) | |