sudo apt install libreadline-devsudo apt install libssl-devsudo apt install zlib1g-dev安装之后,默认创建 postgres 用户,为管理员。
sudo su postgrespsqlCREATE ROLE ubuntu;,也可以在命令行执行 createuser ubuntu
select * from pg_roles;ALTER ROLE ubuntu WITH LOGIN;ALTER ROLE ubuntu WITH CREATEDB;\password ubuntusudo apt install libpq-devsudo apt install g++sudo apt install libevsudo apt install libxml2-dev libxslt-devapt install libmysqlclient-devenv RAILS_ENV=production bin/rails db:create