1. 修改postgresql.conf
postgresql.conf存放位置在
/etc/postgresql/x.x/main
x取决于你安装PostgreSQL的版本号，编辑或添加下面一行，使PostgreSQL可以接受来自任意IP的连接请求。
listen_addresses = '*'
2. 修改pg_hba.conf
增加这一行
#TYPE DATABASE USER CIDR-ADDRESS METHOD
host all all 0.0.0.0/0 md5
3. 重启服务
sudo service postgresql restart
第二步，修改密码
此时，远程登录时，可能提示密码不正确，修改默认用户的密码。
切换账号：sudo -u postgres psql
修改密码：ALTER USER postgres WITH PASSWORD 'postgres';(注意后面有分号)
或者直接修改 Linux 账户的密码(未尝试)
步骤一：删除用户postgres的密码
sudo passwd -d postgres
步骤二：设置用户postgres的密码
sudo -u postgres passwd
系统提示输入新的密码
Enter new UNIX password:
Retype new UNIX password:
如果想新建不同的账户，则按照 Linux 创建账号的步骤来就可以了，因为 PostgreSQL 默认使用的是基于 Linux 的账户认证系统。
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