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daydreamer's questions

Martin Hope
daydreamer
Asked: 2012-09-23 09:41:13 +0800 CST
  • 10
  • 我安装PostgreSQL在EC2机器上，现在我想更改用户的密码postgres
  • 我愿意 
$ sudo -u postgres psql
psql (9.1.5)
Type "help" for help.

postgres=# ALTER USER postgres WITH PASSWORD 'newpasswd';
ALTER ROLE
  • 然后我退出shell并尝试使用新密码登录
$ psql -U postgres -W
Password for user postgres: 
psql: FATAL:  Peer authentication failed for user "postgres"

我的PostgreSQL版本是

$ psql --version
psql (PostgreSQL) 9.1.5
contains support for command-line editing

我做错了什么？

谢谢

更新 我进行了更改pg_hba.conf，这就是现在的样子

# Database administrative login by Unix domain socket
local   all             postgres                                peer

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
#local   all             all                                     peer
local   all             all                                     md5
# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
# IPv6 local connections:
host    all             all             ::1/128                 md5

然后我重新启动了postgres

$ sudo /etc/init.d/postgresql restart
 * Restarting PostgreSQL 9.1 database server                                                                                                                                               [ OK ]

我尝试再次登录，但失败了

$ psql -U postgres -W
Password for user postgres: 
psql: FATAL:  Peer authentication failed for user "postgres"
postgresql postgresql-9.1