在网络上找了一篇文章http://www.linuxidc.com/Linux/2010-04/25232.htm，如下：
Ubuntu 9.10下PostgreSQL 8.4忘记密码的解决方法
Ubuntu 9.10下PostgreSQL 8.4忘记密码的解决方法:1.
编辑pg_hba.conf中的
83 # IPv4 local connections:
84 host all all 127.0.0.1/32 trust[email protected]:/etc/postgresql/8.4/main$ sudo vim pg_hba.conf
[email protected]:/etc/postgresql/8.4/main$ sudo /etc/init.d/postgresql-8.4 restart
* Restarting PostgreSQL 8.4 database server2.
[email protected]:~$ psql -h 127.0.0.1 -U postgres
psql (8.4.2)
SSL connection (cipher: DHE-RSA-AES256-SHA, bits: 256)
Type “help” for help.
postgres=# ALTER USER postgres WITH PASSWORD ‘mickey’;
ALTER ROLE
postgres=# \q3.
将pg_hba.conf中的该回
83 # IPv4 local connections:
84 host all all 127.0.0.1/32 md5[email protected]:/etc/postgresql/8.4/main$ sudo vim pg_hba.conf
[email protected]:/etc/postgresql/8.4/main$ sudo /etc/init.d/postgresql-8.4 restart
* Restarting PostgreSQL 8.4 database server [ OK ]
经过测试，也适用windows版本下9.1。
postgreSQL9.1忘记postgres用户密码怎么办,布布扣,bubuko.com