Refer to the original link: http://www.cnblogs.com/sparkdev/p/5678874.html

Refer to the original link: https://www.cnblogs.com/andfly/p/6589488.html

Reference original link: https://www.jianshu.com/p/dda94c4ffd52

1. Install Postgresql in Ubuntu 16.04

sudo apt install postgresql

If everything goes well, you can see the following installation results:

Two, change the Postgres configuration

edit /etc/postgresql/9.5/main/postgresql.conf

将下面 listen_addresses = 'localhost'注释去掉并改为  listen_addresses = '*'
# - Connection Settings -
#listen_addresses = 'localhost'          
# what IP address(es) to listen on;                
# comma-separated list of addresses;     
# defaults to 'localhost'; use '*' for all
...

将下面password_encryption = on 注释打开
#password_encryption = on

Switch users su - postgres
through psqla command into the postgresql client
change password:

 ALTER USER postgres PASSWORD '123456';

vim /etc/postgresql/9.5/main/pg_hba.confModify host all all 192.168.1.0/24 md5the ip, as follows:0.0.0.0/0

# TYPE DATABASE  USER    CIDR-ADDRESS     METHOD
# "local" is for Unix domain socket connections only
local all    all               trust
# IPv4 local connections:
host  all    all    127.0.0.1/32     trust
host  all    all    192.168.1.0/24    md5
# IPv6 local connections:
host  all    all    ::1/128       trust

Three. Create a database and roles

Start the postgresql service before creating the database and role:

$ service postgresql restart 重启
$ service postgresql stop  停止
$ service postgresql start 启动

First switch the user to postgres (postgres is a system user created during the installation of postgresql. The role of this user is similar to the sa in sqlserver):

sudo -i -u postgres

Create the database kong:

createdb kong

Next, create the role kong, we implement it through the postgresql client:

psql

Type in the interactive command and press Enter:

CREATE USER kong;    // 这个命令创建的role默认具有登录权限

Set a password for testuser:

\password kong       // 按照提示输入密码

Set the owner of the database testdb to testuser:

ALTER DATABASE kong OWNER TO kong;

Use the \q command to log out of the current postgresql login, and then use the following command to log in to the newly created database:

psql -d kong -U kong -h 127.0.0.1 -W

Enter the password you just set for kong:

Postgresql learning (1) installation