昨天我已经安装了postgresql并完成了所有设置并创建了数据库和表，但是今天早晨我突然出现了此错误
我也已经卸载并安装了postgresql，但仍然是相同的错误。而且我还观察到，全新安装时它可以正常工作，但是一旦我关闭或重新启动系统，就会出现以下错误。
psql:
could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
我已经尝试了所有媒介中提供的所有解决方案，但无法解决问题，因此我将在输出中再次发布此问题。
postgresql的状态
**sudo /etc/init.d/postgresql status**
postgresql.service - PostgreSQL RDBMS
Loaded: loaded (/lib/systemd/system/postgresql.service; enabled; vendor preset: enabled)
Active: active (exited) since Wed 2019-10-30 11:40:39 IST; 5min ago
Process: 7666 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
Main PID: 7666 (code=exited, status=0/SUCCESS)
Tasks: 0
Memory: 0B
CPU: 0
CGroup: /system.slice/postgresql.service
当我运行pg_lsclusters
**pg_lsclusters**
Ver Cluster Port Status Owner Data directory Log file
11 main 5432 down postgres /var/lib/postgresql/11/main /var/log/postgresql/postgresql-11-main.log
**dpkg -l | grep postgres**
ii pgdg-keyring 2018.2 all keyring for apt.postgresql.org
ii postgresql 11+207.pgdg16.04+1 all object-relational SQL database (supported version)
ii postgresql-11 11.5-3.pgdg16.04+1 amd64 object-relational SQL database, version 11 server
ii postgresql-client-11 11.5-3.pgdg16.04+1 amd64 front-end programs for PostgreSQL 11
ii postgresql-client-common 207.pgdg16.04+1 all manager for multiple PostgreSQL client versions
ii postgresql-common 207.pgdg16.04+1 all PostgreSQL database-cluster manager
ii postgresql-contrib 11+207.pgdg16.04+1 all additional facilities for PostgreSQL (supported version)
我什至试图重新启动postgres仍然存在的问题。
**sudo /etc/init.d/postgresql status**