ubuntu Error: You must install at least one postgresql-client-<version> package 解决

ubuntu系统上执行psql 报错

Warning: No existing cluster is suitable as a default target. Please see man pg_wrapper(1) how to specify one.
Error: You must install at least one postgresql-client-<version> package

原因是没有安装psql客户端，安装过程如下：

sudo apt install postgresql-client-common
echo "deb http://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" | sudo tee /etc/apt/sources.list.d/pgdg.list
sudo apt update
sudo apt -y install postgresql-client

 

再次执行psql 可以运行

psql: error: connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or directory
        Is the server running locally and accepting connections on that socket?